NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
200 reportsMileage unknown · Sep 3, 2026
Power Train
1. My vehicle is having transmission issues with shuddering and shifting. M5U RPO code 8L90 transmission. 2. My safety and the safety of others is a concern if the transmission is not working as intended my vehicle could be at risk an accident that could be avoided. 3. The problem has not be reproduced or confirmed by a dealer I…
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1. My vehicle is having transmission issues with shuddering and shifting. M5U RPO code 8L90 transmission. 2. My safety and the safety of others is a concern if the transmission is not working as intended my vehicle could be at risk an accident that could be avoided. 3. The problem has not be reproduced or confirmed by a dealer I work on my own vehicles and I am going to repair this issue myself if able. 4. There are no trouble codes on my vehicle when scanned with an OBD2 scanner.
NHTSA ODI #11761928
Mileage unknown · Jun 25, 2026
Chest Clip, Buckle, Harness
After my child had thrown up all over the car seat her father had taken her inside to clean up and I took the car seat apart to throw the pieces into the washer to clean them. The harness strap did not come out fully clean so I contacted Graco for a replacement piece and I was told that they don’t replace those and that the stra…
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After my child had thrown up all over the car seat her father had taken her inside to clean up and I took the car seat apart to throw the pieces into the washer to clean them. The harness strap did not come out fully clean so I contacted Graco for a replacement piece and I was told that they don’t replace those and that the strap being removed totaled my car seat. It has a woven material tab that goes up through the hard plastic base and locks in by opening itself. It’s essentially a T in the material so it can be folded to go back through the hard plastic base. I was told that since the manual doesn’t provide instructions regarding that piece that I should know it’s not to be removed. No where in the manual, on the car seat or on the strap says it’s not to be removed. I did not damage/break/cut any pieces to get it in or out of the car seat. I was a mom in a panic trying to clean the car seat as quickly as possible so I could tend to my sick child. There were no warning signs telling me anywhere not to remove it. I don’t want other parents to do what I did and have a totaled car seat that they continue to use. I did not have the manual at the time of removing the pieces for cleaning but I have since located the PDF and read through all 96 pages.
NHTSA ODI #11746486
Mileage unknown · Apr 22, 2026
EngineSteeringVehicle Speed ControlCrash
My wife was driving down the highway and out of no where there was a loud taping sound, the vehicle started running real bad (skipping), the vehicle lost power and she lost control of the steering. As a result, she ran off the road into a ditch. this is a known concern with the 6.2 liter engines and all signs are pointing to lif…
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My wife was driving down the highway and out of no where there was a loud taping sound, the vehicle started running real bad (skipping), the vehicle lost power and she lost control of the steering. As a result, she ran off the road into a ditch. this is a known concern with the 6.2 liter engines and all signs are pointing to lifter failure. She could have ben seriously injured and GM is responsible for this.
NHTSA ODI #11732911
Mileage unknown · Apr 19, 2026
Power Train
TRANSMISSION FAILURE ON 8L90 8 SPEED TRANSMISSION. 93,000 MILES.
NHTSA ODI #11732277
Mileage unknown · Mar 25, 2026
Engine
I am submitting this complaint to report what I believe to be a serious and systemic safety defect involving GM 6.2L engines equipped with fuel efficiency systems such as Active Fuel Management (AFM) or Dynamic Fuel Management (DFM). I have experienced catastrophic engine failure in two separate GMC Yukon Denali vehicles with n…
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I am submitting this complaint to report what I believe to be a serious and systemic safety defect involving GM 6.2L engines equipped with fuel efficiency systems such as Active Fuel Management (AFM) or Dynamic Fuel Management (DFM). I have experienced catastrophic engine failure in two separate GMC Yukon Denali vehicles with nearly identical symptoms, which strongly suggests a broader design defect rather than isolated mechanical issues. My first vehicle, a 2015 GMC Yukon Denali XL, developed significant engine performance problems consistent with known lifter and camshaft failures widely reported in GM vehicles using these fuel efficiency systems. Due to ongoing reliability concerns and the financial burden of potential repair, I was forced to trade this vehicle at a loss. My second vehicle, a 2016 GMC Yukon Denali XL equipped with the same engine platform, suffered sudden and catastrophic engine failure in February 2026. This failure occurred abruptly and without meaningful prior warning, rendering the vehicle inoperable and creating a potentially hazardous situation. Sudden engine failure of this nature presents a significant safety risk, particularly if it occurs at highway speeds or in heavy traffic. An oil service had been performed on this vehicle in December 2025 at a Jiffy Lube franchise. After the failure, an independent service provider documented that the oil fill cap had been left loose. However, the Jiffy Lube franchise and its insurance carrier have denied responsibility, asserting that the engine failure is attributable to known defects and reliability issues associated with GM’s fuel efficiency engine systems. As a result, both the manufacturer and the service provider are denying responsibility for a catastrophic mechanical failure that has serious safety implications. This leaves consumers exposed to sudden engine failure risk with no meaningful recourse. Based on my direct experience with two separate vehicles exhibiting similar catastroph
NHTSA ODI #11727109
Mileage unknown · Feb 23, 2026
Engine
AFM system failed resulting in engine replacement.
NHTSA ODI #11719971
Mileage unknown · Feb 19, 2026
Forward Collision AvoidanceSteering
I was test driving the vehicle after some and as I was test, driving it, the steering lot up on me. Luckily, I was entering a residential area when it occurred down the street from my residency; in which I was able to drive it to my residency, during that short ride, you could smell a burning smell coming out along with some cra…
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I was test driving the vehicle after some and as I was test, driving it, the steering lot up on me. Luckily, I was entering a residential area when it occurred down the street from my residency; in which I was able to drive it to my residency, during that short ride, you could smell a burning smell coming out along with some crackling noises. I had to get the vehicle towed a week later to the mechanic shop where they fix one of my engine problems and verified that I needed a new power steering unit and gave me a quote, I couldn’t afford the word and started doing research and came across the recall for the power steering within my vehicle year, make and model. I replaced the power steering unit, but I’m having a difficult time celebrating the system..
NHTSA ODI #11719051
Mileage unknown · Feb 11, 2026
EngineFuel/propulsion SystemPower Train
My vehicle has been in 16 times since I bought it the most recent incident is for the engine which started about six months ago. It’s been in since then for other issues concurrently with this one it hesitates like it’s getting stuck in sand before it wants to go first the mechanic told me he didn’t sense it but the thermostat w…
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My vehicle has been in 16 times since I bought it the most recent incident is for the engine which started about six months ago. It’s been in since then for other issues concurrently with this one it hesitates like it’s getting stuck in sand before it wants to go first the mechanic told me he didn’t sense it but the thermostat was stuck open so they fix that. Second time it went in they thought it was some sort of a filter and some other components I’m not sure. Again it was not fixed then my son and I were out in Minnesota freezing cold night in November and go and drive and then when again it was the drive train this time that got fixed a month ago about a week ago it starts making a noise like there’s too much snow in the tires. I get my car washed every few days but I got it washed again and that didn’t fix it so it’s in the shop again and I’m paying for a rental again. I have the Walser guard thank the Lord because it’s paid for itself about 15 times over. I’ve gotten two transmissions, an air conditioner, two sensors the arm that other people have complained about I don’t know exactly the name of it the trailer component that you plug into also blew out my seven way and I had to have my seven way wire fixed so I’m nervous about plugging that back in. My dad passed away and I spent $70,000 of my inheritance by this car. I should’ve flushed it down a toilet instead. Everybody makes fun at work that this car is literally gonna kill my kids and I because every other day it feels like we’re stuck on the side of the road.
NHTSA ODI #11717371
Mileage unknown · Jan 25, 2026
Engine
Driving after dark on a main street in St George Utah, the engine suddenly surged and then revved down. It felt like someone jamming it into 4WD. Traffic was tailgating me, and I was nearly hit. I could not pull completely out of the right lane. I put on hazard lights. Check engine light came on, and TCS light came on. I d…
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Driving after dark on a main street in St George Utah, the engine suddenly surged and then revved down. It felt like someone jamming it into 4WD. Traffic was tailgating me, and I was nearly hit. I could not pull completely out of the right lane. I put on hazard lights. Check engine light came on, and TCS light came on. I decided to get out of traffic & crawled forward about 30 yards into a Sinclair station lot, then backed it into a spot where a tow truck could get it. It was clearly not drivable. Called AAA and a driver was able to get to me within 1/2 an hour. Checked the AAA website for mechanics since I was merely travelling through St. George and had no knowledge of the area. Hawker's Automotive was listed first, with many excellent reviews. Tow truck arrived and driver loaded it on the JerrDan bed. I asked him to take me to the Hawker's garage location. I locked it and put the key in the overnight box with my name, number, and description. Next day the mechanics said lifter arm was collapsed. Needed tearing down, replacing and probably new camshaft. Gave me estimate for "estimated" repair of about $8,000 or new engine at about $12,000! This is a KNOWN GMC failure apparently. Recalls have been initiated on newer models, but every mechanic will tell you that this happens all the time to all the 6.2L, V8 engine at around 150,000. I bought it used at about 156,000 miles and have put about 5,000 miles on it. And changed the oil at purchase, and about 1,000 miles ago. I researched model and year before purchasing. All online reviews I found were positive. Nothing out there on this know manufacturing flaw. But now when I type in 'catastrophic engine failure 2016 Denali XL" many many reviews and videos state that it is a known problem to both GMC and NHTSA. I or someone could have been killed by such a dramatic loss of power! This is a SAFETY issue and NHTSA needs to review ALL THE COMPLAINTS ON FILE ALREADY. Thankyou
NHTSA ODI #11713229
Mileage unknown · Jan 19, 2026
EngineFuel/propulsion SystemPower Train
There is a hesitation when trying to accelerate. The car will then slam forward and there is a rattling noise that the car also makes. This has almost caused accidents. I was driving in town which is where I do most of my driving.
NHTSA ODI #11711810
Official recalls
3Jul 10, 2017
General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may not have received the complete software update necessary to remedy the recall condition. Without the update, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence & remedy
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on August 4, 2017. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 17287.
Additional source detail variants (3)
Seat Belts:pretensioner
General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may not have received the complete software update necessary to remedy the recall condition. Without the update, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on August 4, 2017. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 17287.
Air Bags:frontal:sensor/control MODULE-INACTIVE
General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may not have received the complete software update necessary to remedy the recall condition. Without the update, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on August 4, 2017. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 17287.
Air Bags:frontal
General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may not have received the complete software update necessary to remedy the recall condition. Without the update, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on August 4, 2017. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 17287.
Sep 8, 2016
General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence & remedy
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on October 13, 2016. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 16007.
Additional source detail variants (3)
Seat Belts:pretensioner
General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on October 13, 2016. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 16007.
Air Bags:frontal:sensor/control MODULE-INACTIVE
General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on October 13, 2016. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 16007.
Air Bags:frontal
General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Consequence: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Remedy: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on October 13, 2016. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 16007.
Apr 28, 2016
General Motors LLC (GM) is recalling certain model year 2016-2017 Chevrolet Silverado 1500 and 2016 Cadillac Escalade, Cadillac Escalade ESV, Chevrolet Suburban, Chevrolet Tahoe, GMC Sierra, GMC Yukon and GMC Yukon XL vehicles. The front upper control arms may have inadequate welds near the control arm bushing.
Consequence & remedy
Consequence: Inadequate welds may allow the control arm to separate from the bushing, compromising steering and increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will replace the left and right front upper control arms and realign the vehicle, free of charge. The recall began on May 18, 2016. Until the repairs have been made, owners are advised not to drive their vehicles. Owners may contact Chevrolet customer service at 1-800-222-1020, Cadillac customer service at 1-800-458-8006, or GMC customer service at 1-800-462-8782. GM's number for this recall is 42190.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1PE18012 · Brake Vacuum Pump Failure
Opened Nov 20, 2018 · Closed Apr 10, 2022
Status: closed (inferred from source dates) · Service Brakes; Service Brakes, Hydraulic; Service Brakes, Hydraulic:power Assist:vacuum
On November 20, 2018, the Office of Defects Investigations (ODI) opened PE18-012 to investigate instances of sudden onset of a hard brake pedal that could result in extended stopping distance due to an issue with the brake assist vacuum pump in model year (MY) 2014 through 2016 GMC Sierra 1500 and Chevrolet Silverado 1500 series pickup trucks and MY 2015 through 2016 Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe, and GMC Yukon SUVs.If the brake assist vacuum pump fails to operate as intended, the amount of brake power assist supplied to the driver can be significantly reduced, extending the subject vehicle stopping distance. GM stated that the root cause of pump failures was due to foreign debris such as oil sludge in the engine oil. GM stated that this debris can become trapped by the oil inlet filter screen. Under normal operation, this screen allows a small amount of oil into the brake vacuum pump. The foreign debris can, over time, clog the pump which can cause a loss of lubrication and a reduction in the amount of vacuum produced leading to a hard pedal and extended stopping distance.On December 13, 2018, GM issued a Special Coverage (N182202780) for the brake vacuum pump issue in MY 2014-2017 trucks and 2015-2017 SUVs on the K2XX platform for 6 years or 72,000 miles. Special Coverage repair includes the replacement of the vacuum pump and vacuum pump belt. Consumers received notification of the coverage via mail. On September 6, 2019, GM notified NHTSA that it was conducting safety recall 19V-645 which reprograms the electronic brake control module (EBCM) and included approximately 3.5 million trucks and SUVs. In October 2019, GM extended the terms of special coverage N182202780 to 10 years or 150,000 miles as well as now including the entire scope of recall 19V-645. In October 2020, GM expanded the scope of coverage N182202780 to include the MY 2018 Escalade and 2019 Tahoe.The remedy implemented in GM recall 19V-645 appears to be sufficient in addressing the safety-related concerns of this issue. Loss of vacuum assist now occurs at a progressive rate as well as there being a more timely warning of a brake problem to the driver through the driver information center (DIC). In view of the recall action and revision to the special coverage, this Preliminary Evaluation is closed. The agency reserves the right to take additional action if warranted by new circumstances. The ODI reports cited above are available for review online at NHTSA.gov under the identification numbers in the attached document.
Additional source detail variants (3)
Service Brakes
On November 20, 2018, the Office of Defects Investigations (ODI) opened PE18-012 to investigate instances of sudden onset of a hard brake pedal that could result in extended stopping distance due to an issue with the brake assist vacuum pump in model year (MY) 2014 through 2016 GMC Sierra 1500 and Chevrolet Silverado 1500 series pickup trucks and MY 2015 through 2016 Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe, and GMC Yukon SUVs.If the brake assist vacuum pump fails to operate as intended, the amount of brake power assist supplied to the driver can be significantly reduced, extending the subject vehicle stopping distance. GM stated that the root cause of pump failures was due to foreign debris such as oil sludge in the engine oil. GM stated that this debris can become trapped by the oil inlet filter screen. Under normal operation, this screen allows a small amount of oil into the brake vacuum pump. The foreign debris can, over time, clog the pump which can cause a loss of lubrication and a reduction in the amount of vacuum produced leading to a hard pedal and extended stopping distance.On December 13, 2018, GM issued a Special Coverage (N182202780) for the brake vacuum pump issue in MY 2014-2017 trucks and 2015-2017 SUVs on the K2XX platform for 6 years or 72,000 miles. Special Coverage repair includes the replacement of the vacuum pump and vacuum pump belt. Consumers received notification of the coverage via mail. On September 6, 2019, GM notified NHTSA that it was conducting safety recall 19V-645 which reprograms the electronic brake control module (EBCM) and included approximately 3.5 million trucks and SUVs. In October 2019, GM extended the terms of special coverage N182202780 to 10 years or 150,000 miles as well as now including the entire scope of recall 19V-645. In October 2020, GM expanded the scope of coverage N182202780 to include the MY 2018 Escalade and 2019 Tahoe.The remedy implemented in GM recall 19V-645 appears to be sufficient in addressing the safety-related concerns of this issue. Loss of vacuum assist now occurs at a progressive rate as well as there being a more timely warning of a brake problem to the driver through the driver information center (DIC). In view of the recall action and revision to the special coverage, this Preliminary Evaluation is closed. The agency reserves the right to take additional action if warranted by new circumstances. The ODI reports cited above are available for review online at NHTSA.gov under the identification numbers in the attached document.
Service Brakes, Hydraulic
On November 20, 2018, the Office of Defects Investigations (ODI) opened PE18-012 to investigate instances of sudden onset of a hard brake pedal that could result in extended stopping distance due to an issue with the brake assist vacuum pump in model year (MY) 2014 through 2016 GMC Sierra 1500 and Chevrolet Silverado 1500 series pickup trucks and MY 2015 through 2016 Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe, and GMC Yukon SUVs.If the brake assist vacuum pump fails to operate as intended, the amount of brake power assist supplied to the driver can be significantly reduced, extending the subject vehicle stopping distance. GM stated that the root cause of pump failures was due to foreign debris such as oil sludge in the engine oil. GM stated that this debris can become trapped by the oil inlet filter screen. Under normal operation, this screen allows a small amount of oil into the brake vacuum pump. The foreign debris can, over time, clog the pump which can cause a loss of lubrication and a reduction in the amount of vacuum produced leading to a hard pedal and extended stopping distance.On December 13, 2018, GM issued a Special Coverage (N182202780) for the brake vacuum pump issue in MY 2014-2017 trucks and 2015-2017 SUVs on the K2XX platform for 6 years or 72,000 miles. Special Coverage repair includes the replacement of the vacuum pump and vacuum pump belt. Consumers received notification of the coverage via mail. On September 6, 2019, GM notified NHTSA that it was conducting safety recall 19V-645 which reprograms the electronic brake control module (EBCM) and included approximately 3.5 million trucks and SUVs. In October 2019, GM extended the terms of special coverage N182202780 to 10 years or 150,000 miles as well as now including the entire scope of recall 19V-645. In October 2020, GM expanded the scope of coverage N182202780 to include the MY 2018 Escalade and 2019 Tahoe.The remedy implemented in GM recall 19V-645 appears to be sufficient in addressing the safety-related concerns of this issue. Loss of vacuum assist now occurs at a progressive rate as well as there being a more timely warning of a brake problem to the driver through the driver information center (DIC). In view of the recall action and revision to the special coverage, this Preliminary Evaluation is closed. The agency reserves the right to take additional action if warranted by new circumstances. The ODI reports cited above are available for review online at NHTSA.gov under the identification numbers in the attached document.
Service Brakes, Hydraulic:power Assist:vacuum
On November 20, 2018, the Office of Defects Investigations (ODI) opened PE18-012 to investigate instances of sudden onset of a hard brake pedal that could result in extended stopping distance due to an issue with the brake assist vacuum pump in model year (MY) 2014 through 2016 GMC Sierra 1500 and Chevrolet Silverado 1500 series pickup trucks and MY 2015 through 2016 Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe, and GMC Yukon SUVs.If the brake assist vacuum pump fails to operate as intended, the amount of brake power assist supplied to the driver can be significantly reduced, extending the subject vehicle stopping distance. GM stated that the root cause of pump failures was due to foreign debris such as oil sludge in the engine oil. GM stated that this debris can become trapped by the oil inlet filter screen. Under normal operation, this screen allows a small amount of oil into the brake vacuum pump. The foreign debris can, over time, clog the pump which can cause a loss of lubrication and a reduction in the amount of vacuum produced leading to a hard pedal and extended stopping distance.On December 13, 2018, GM issued a Special Coverage (N182202780) for the brake vacuum pump issue in MY 2014-2017 trucks and 2015-2017 SUVs on the K2XX platform for 6 years or 72,000 miles. Special Coverage repair includes the replacement of the vacuum pump and vacuum pump belt. Consumers received notification of the coverage via mail. On September 6, 2019, GM notified NHTSA that it was conducting safety recall 19V-645 which reprograms the electronic brake control module (EBCM) and included approximately 3.5 million trucks and SUVs. In October 2019, GM extended the terms of special coverage N182202780 to 10 years or 150,000 miles as well as now including the entire scope of recall 19V-645. In October 2020, GM expanded the scope of coverage N182202780 to include the MY 2018 Escalade and 2019 Tahoe.The remedy implemented in GM recall 19V-645 appears to be sufficient in addressing the safety-related concerns of this issue. Loss of vacuum assist now occurs at a progressive rate as well as there being a more timely warning of a brake problem to the driver through the driver information center (DIC). In view of the recall action and revision to the special coverage, this Preliminary Evaluation is closed. The agency reserves the right to take additional action if warranted by new circumstances. The ODI reports cited above are available for review online at NHTSA.gov under the identification numbers in the attached document.
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