NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
59 reports98,000 miles · Aug 28, 2024
Power TrainVehicle Speed Control
The contact owns a 2018 Chevrolet Impala. The contact stated while driving 45 MPH, the accelerator pedal was depressed but was inoperable. The contact stated that the vehicle failed to accelerate as intended. There was no warning light illuminated. The vehicle was taken to an independent mechanic and a dealer and was diagnosed w…
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The contact owns a 2018 Chevrolet Impala. The contact stated while driving 45 MPH, the accelerator pedal was depressed but was inoperable. The contact stated that the vehicle failed to accelerate as intended. There was no warning light illuminated. The vehicle was taken to an independent mechanic and a dealer and was diagnosed with transmission failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 98,000.
NHTSA ODI #11611424
Mileage unknown · Aug 27, 2024
Tires
The contact owns a 2018 Chevrolet Impala equipped with Goodyear Tires, Tire Line: Assurance, Tire Size: 235/50/R18, DOT Number: MT1PJBUR2920. The contact stated that while the vehicle was in for routine service, it was discovered that all four tires had severe tread separation and piling. The cause of the failure was not yet det…
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The contact owns a 2018 Chevrolet Impala equipped with Goodyear Tires, Tire Line: Assurance, Tire Size: 235/50/R18, DOT Number: MT1PJBUR2920. The contact stated that while the vehicle was in for routine service, it was discovered that all four tires had severe tread separation and piling. The cause of the failure was not yet determined. The tires were not yet replaced. The manufacturer and local dealer were not contacted. The failure mileage was unknown.
NHTSA ODI #11611081
Mileage unknown · Jul 6, 2024
Steering
Power steering suddenly went out when driving without any indication as to why. Took to dealership and very expensive to fix. Only had the car for 6 months
NHTSA ODI #11599577
Mileage unknown · Apr 15, 2024
Unknown Or Other
answers to Questions from above 1. EVAPORATOR KIT 84409864 2. Not a safety issue to my knowledge. 3. Yes, issue was diagnosed and repaired at dealership. (Receipt for work - including part numbers will be attached with supporting documents) 4. No, no one outside of the dealership. 5. No warning lights but there was the smell o…
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answers to Questions from above 1. EVAPORATOR KIT 84409864 2. Not a safety issue to my knowledge. 3. Yes, issue was diagnosed and repaired at dealership. (Receipt for work - including part numbers will be attached with supporting documents) 4. No, no one outside of the dealership. 5. No warning lights but there was the smell of coolant in the cab of the car. Due to an issue with my 2018 Chevy Impala - V6 engine, I had to have the AC evaporator core replaced due to a leak (faulty part). Searching the NHTSA website, I found the below special coverage which seems to match my vehicle perfectly including the issue for which the special coverage was issued. I filed a claim with GM but continue to be told that my vehicle is not covered by this but no reason as to why it isn't covered. *Special Coverage N182186881 - Evaporator Core Icing, Leak *Quantity Part Name Part No. *1 EVAPORATOR KIT 84409864 This is concerning as a consumer as the issue and vehicle description matches the special coverage exactly, yet GM is stating that my vehicle is not covered. This issue clearly extends beyond the number of vehicles affected that was reported. Also, being replaced with the same part (part num) does give me pause that this will be an issue again in the future, costing consumers even more money and time.
NHTSA ODI #11582997
Mileage unknown · Oct 30, 2023
Unknown Or Other
The Evaporator core is leaking and a/c system is not operative. There is an outstanding report from your office, DCS4922, that outlines this condition perfectly. This report talks about a Special Coverage Adjustment #N182186881 Evaporator Core Icing, Leak, and an estimated number of vehicles involved. Since it is an estimated nu…
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The Evaporator core is leaking and a/c system is not operative. There is an outstanding report from your office, DCS4922, that outlines this condition perfectly. This report talks about a Special Coverage Adjustment #N182186881 Evaporator Core Icing, Leak, and an estimated number of vehicles involved. Since it is an estimated number of vehicles it means that GM doesn't know exactly how many vehicles are involved. It is my position that my vehicle should be included in the Service Adjustment. General Motors will not consider repair based on my VIN. This Special coverage addresses the exact issue I am experiencing. I have visited a Chevy Impala public forum and found there are others experiencing the same issue. Any help will be appreciated.
NHTSA ODI #11552712
Mileage unknown · Sep 14, 2023
Electrical SystemWheels
Tire pressure sensor system receiver (part of keyless entry system) will not collect info from individual tire pressure sensors in tires. Failure of this safety system would not provide and advance warning of low tire pressure.
NHTSA ODI #11544465
Mileage unknown · Jun 8, 2023
Power Train
While driving or idling (car in D/M, both automatic and manual), the car will rapidly shift to park and then back to where the shifter was set, usually in a lower gear that slows the car down or prevents acceleration. The transmission or speed sensor could be an issue. This can happen in rapid succession 3-5+ times in a row, w…
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While driving or idling (car in D/M, both automatic and manual), the car will rapidly shift to park and then back to where the shifter was set, usually in a lower gear that slows the car down or prevents acceleration. The transmission or speed sensor could be an issue. This can happen in rapid succession 3-5+ times in a row, which has led to a drop in speed from 65 MPH to 40 MPH, especially dangerous at faster speeds on a highway or when deceleration is occurring more quickly, like going up a steep hill. I am unsure what indication there is for cars that are behind me, but they have had to slow down or pass me in some instances to avoid hitting me. If it happens while turning at a 2 way stop or on an entrance ramp, my car might not accelerate fast enough to merge into traffic. There have been no lights on the dash, and the dealer has not been able to identify the issue when I have taken it in.
NHTSA ODI #11526108
Mileage unknown · May 19, 2023
Steering
My service stability and service power steering g drive with care warning lights came on.. I DO NOT have any power steering.. I am lucky I was NOT driving on the road when power steering failed. A SERVICE BULLERIN 19NA182 has be given to this very unsafe issue.
NHTSA ODI #11522829
Mileage unknown · Apr 22, 2023
Electrical SystemSteering
As I was driving home from my place of employment which is exactly 30 miles from where I live my Steering Assist went out and it was very hard to steer and to even stay in the lane which I was driving I managed to get the car home and did an under carriage inspection and there was no damage still kind of shaken from the power st…
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As I was driving home from my place of employment which is exactly 30 miles from where I live my Steering Assist went out and it was very hard to steer and to even stay in the lane which I was driving I managed to get the car home and did an under carriage inspection and there was no damage still kind of shaken from the power steering going out I checked for the power steering pump and the power steering fluid reserve but found out through my owner's manual that I have electronic power steering I took the car by my local Chevrolet dealer and was told it was nothing they could do because they knew nothing about how to repair such a problem the only warning lamp that I received was a message that said power steering service drive with care
NHTSA ODI #11518465
Mileage unknown · Aug 6, 2022
Electrical SystemEnginePower Train
While driving from work the car did a quick jerk and the STABILITRAK, ABS AND CHECK ENGINE LIGHT ALL CAME ON ALL AT ONCE. As I pulled into my workplace the car lost power to the engine completely while displaying ACTION REQUIRED ON THE LCD SCREEN. The brake and steering wheel became stiff and it was hard to control the vehicle. …
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While driving from work the car did a quick jerk and the STABILITRAK, ABS AND CHECK ENGINE LIGHT ALL CAME ON ALL AT ONCE. As I pulled into my workplace the car lost power to the engine completely while displaying ACTION REQUIRED ON THE LCD SCREEN. The brake and steering wheel became stiff and it was hard to control the vehicle. It took 10 minutes for me to regain power and control over the vehicle that again after leaving work stopped on the highway.
NHTSA ODI #11477959