2016 Chevrolet Colorado

While sitting in idle the engine will just start to idle rough for no reason this happens all the time and clear out when accelerated. While driving the radio and Infotainment screen will go blank then come back on. I was driving on the freeway going straight and all of a sudden the power steering went out and I got this warning light on for the power steering being disabled along with this vehicle symbol and squiggly lines behind it on. I drove to a safe spot with the truck feeling really heavy. Turned it off and on then it cleared up. This power steering issue just happened.

Vacuum pump busted as shown in photos. Once that busted it sent metal shrapnel into the engine which broke a piece of the cam shaft into bits. There were metal fragments that had to be meticulously cleaned out of my engine block. The loss of vacuum seal caused me to lose brakes while driving in stop and go traffic on the highway.

COMPONENT: The piston in cylinder #1 cracked and created conditions for the fuel injector to bore a hole through it. SAFETY: This led to sudden loss of engine power and violent shaking of the vehicle at highway speeds. CONFIRMATION: Multiple reports of the exact same incident can be confirmed and researched at ColoradoFans.com, specifically on these threads https://www.coloradofans.com/threads/looks-like-my-number-finally-came-up-engine-failure.444376 https://www.coloradofans.com/threads/poll-how-many-blown-up-2-8-diesels-please-indicate-on-poll.396705/ https://www.coloradofans.com/threads/documented-2-8l-duramax-lwn-engine-catastrophic-failures-thread.427244 INSPECTION: Confirmed the crack and the hole in piston #1 with borescope. WARNINGS: Prior to catastrophic failure, there was an ongoing intermittent issue chasing down DTC P11CC - NOx1 Performance Low. Not sure if that was a harbinger or completely unrelated.

The contact owns a 2016 Chevrolet Colorado. The contact stated that while driving at an undisclosed speed and making a turn, the vehicle stalled but restarted. The contact continued driving, but the failure recurred. There were no warning lights illuminated. The contact stated that the failure should be covered under NHTSA Campaign Number: 21V213000 (Steering). The contact pulled over to the side of the roadway. The vehicle was taken to the local dealer, where it was diagnosed that the steering gear torque sensor cover assembly needed to be replaced; Part Number: 23232310. The vehicle was repaired. The manufacturer was not contacted. The failure mileage was approximately 122,998.

-What component or system failed or malfunctioned, and is it available for inspection upon request? 2016 Chevrolet Colorado VIN: [XXX] Engine: 2.5L I4 (camshaft-driven brake system assist vacuum pump failure). GM Technical Service Bulletin 21-NA-268 (Nov 2021) confirms that if vacuum pump drive lugs are broken, replacement of both the vacuum pump and the exhaust camshaft is required which was the case. Parts kept by repair facility that performed service. Autonation Chevrolet South Clearwater FL 33764. -How was your safety or the safety of others put at risk? May, 2025 the vehicle experienced a sudden loss of braking (hard/stiff brake pedal). This is a safety-critical failure. -Has the problem been reproduced or confirmed by a dealer or independent service center?Yes by shop stated above. Diagnosis showed a seized engine brake system vacuum pump (driven by the exhaust camshaft) that had sheared drive lugs and produced metal debris which damaged the exhaust camshaft and associated components. The repair required replacement of the vacuum pump and the exhaust camshaft; my total repair cost was over $4,000. The camshaft was not readily available and I required a rental car for over 30 days while waiting for parts. -Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? System and parts inspected by shop above. GM Special Coverage N182202780 (Apr 2019) addresses vacuum-pump related decreased brake assist for certain 2014–2017 GM trucks/SUVs, but Colorado is not listed in that bulletin’s model list. -Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Check Engine came on at time of brake loss (Brake Vacuum Pump Failure). Immediate system failure. I request NHTSA send me a copy of any investigation number or record created for this complaint, and I request guidance on whether I may be eligible for reimbursement under any GM program. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATIO

07-01-23 Vehicle died out, wouldn't start, got jumped, still wouldn't start. No indicator lights or warnings. Towed vehicle to the dealership, where it was for 11 1/2 months with the determination it was the ECM and Harness. Which it took that long to get. The vehicle was given back 06-14-24, even though it was in running condition, it was discovered parts were missing. Dealership put on order, received by end of July and installed. November 13, 2024, vehicle died out while driving on the freeway. Dashboard lit up everything, had to get the vehicle towed back to dealership. I have the Onstar diagnostics indicating the same components as the original reason the vehicle was held for an approximate year. Dealership now has vehicle and we have to wait for them to do a diagnostic.

06/13/2023: Odometer: 86881 Transmission-2nd Shift: Flare, 3rd Shift: rough shift flare, 4th Shift: shutter. Excessive metal particles in the fluid. No transmission codes or engine light detected. Result was a new rebuilt transmission. 11/01/23: Odometer: 90239 Engine Code: P00b7 coolant flow restriction, stuck thermostat. Result was to replace thermostat and flush coolant system. 12/06/23: Odometer: 91701 No codes detected. Fluids noticed on pavement occasionally. Valve cover gasket, vacuum pump gasket were failing. Result was to replace all parts. 02/25/24: Odometer: 92885 Code-engine overheating, idle engine. Critical 260 upon cold start. Failing temperature sensor. Result was to replace front and rear temperature sensor. Driver seat has begun to unravel and separate at the stich line on the side closest to the door. No repairs have been made. Issue began years ago. Approximately 2018. The area was small and has slowly widened. Approximately 6 inches currently even with avoidance of stretching and being cautious of that area. I do have documentation of this events and repairs if they are needed.

I have asthma and it is controlled by medication when needed. Recently I have had a lot more incidents of breathing difficulty since I purchased my vehicle. It was during one of these episodes that my wife noticed an odor associated with antifreeze. However, there is no moisture in the vehicle and no visible leaks or puddles on the ground. I have detected the same odor when standing near the back of the truck near the tailpipe. Also, I have had to refill the radiator with exactly five gallons of Antifreeze in less than 3000 miles of driving. It was my wife who alerted me to the odor being inside the vehicle and only during times when the heater was running. Since that time I have driven the vehicle only when I can safely leave the heater off, because I cannot be sure it is safe. If I need the heater to defrost, I leave the vehicle. Also, I noticed that when the engine coolant is low, the engine never seems to overheat, and the heater no longer blows hot air. Is this an issue involving only my vehicles and what other health risks are there? The most I have had to add to restore heat is a gallon of coolant.

The contact owns a 2016 Chevrolet Colorado. The contact stated while driving 45 MPH, upon reaching the top of an incline, the vehicle began to shudder before losing motive power. The contact pushed the vehicle to the shoulder of the roadway, where the vehicle failed to restart. The check warning light was illuminated. The vehicle was towed to the dealer, who diagnosed failures with the purge valve and mass air flow sensor. The vehicle was repaired, but the failure reoccurred. The dealer was made aware of the failure and informed the contact that there was a possible failure with the vent valve canister. After a visual inspection of the engine compartment, the contact discovered water within the vent valve canister. After investigating the failure, the contact related it to Emission Recall: N202313200. The manufacturer was notified of the failure but referred the contact to the NHTSA Hotline for assistance. The failure mileage was 96,000.