10
Complaints
0
Crashes
0
Fires
0
Deaths

This Problem Across All Years

All Engine Complaints

Showing 10 of 10
Apr 30, 2025 100,000 mi

The contact owns a 2016 GMC Sierra 3500. The contacted stated that while her husband was attempting to start the vehicle, the contact stated that after five minutes the engine independently failed while the vehicle was running. No warning light was illuminated. The vehicle was towed to an independent mechanic where it was diagnosed and determined that the fuel system and fuel pump needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure but offered no assistance. The contact was transferred to the NHTSA Hotline to report the failure. The approximate failure mileage was 100,000.

Apr 30, 2025 100,000 mi

The contact owns a 2016 GMC Sierra 3500. The contacted stated that while her husband was attempting to start the vehicle, the contact stated that after five minutes the engine independently failed while the vehicle was running. No warning light was illuminated. The vehicle was towed to an independent mechanic where it was diagnosed and determined that the fuel system and fuel pump needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure but offered no assistance. The contact was transferred to the NHTSA Hotline to report the failure. The approximate failure mileage was 100,000.

Apr 4, 2025

Driving my vehicle in the mountains pulling a 16000 lb 5th wheel trailer, the engine goes into Reduced Engine Power due to a Turbo Vane Position sensor / Turbo Over Boost or Under Boost fault. This has happened 4 times in the last 3 months and has nearly caused an accident following each occurrence. The vehicle is a 2016 GMC Sierra 3500HD with the 6.6L LML Duramax Diesel engine with 75000 miles. I believe the Reduced Engine Power protection is far to abrupt in the loss of Engine Power to safely move the vehicle out of the flow of traffic. During each occurrence I was in the left lane of a 2 lane expressway attempting to pass a much slower vehicle going up a 5-8% grade and was unable to complete my pass due to the loss in propulsion which nearly caused an accident.

Apr 4, 2025

Driving my vehicle in the mountains pulling a 16000 lb 5th wheel trailer, the engine goes into Reduced Engine Power due to a Turbo Vane Position sensor / Turbo Over Boost or Under Boost fault. This has happened 4 times in the last 3 months and has nearly caused an accident following each occurrence. The vehicle is a 2016 GMC Sierra 3500HD with the 6.6L LML Duramax Diesel engine with 75000 miles. I believe the Reduced Engine Power protection is far to abrupt in the loss of Engine Power to safely move the vehicle out of the flow of traffic. During each occurrence I was in the left lane of a 2 lane expressway attempting to pass a much slower vehicle going up a 5-8% grade and was unable to complete my pass due to the loss in propulsion which nearly caused an accident.

Jul 23, 2024 105,000 mi

The contact owns a 2016 GMC Sierra 3500. The contact stated while driving 20 MPH, there was an abnormal rattling sound coming from the engine compartment. The vehicle lost motive power and stalled. The vehicle was towed to the residence. The vehicle was towed to an independent mechanic where it was diagnosed that the crankshaft, lower bearings, head gasket seals, and the long block needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 105,000.

Jul 23, 2024 105,000 mi

The contact owns a 2016 GMC Sierra 3500. The contact stated while driving 20 MPH, there was an abnormal rattling sound coming from the engine compartment. The vehicle lost motive power and stalled. The vehicle was towed to the residence. The vehicle was towed to an independent mechanic where it was diagnosed that the crankshaft, lower bearings, head gasket seals, and the long block needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 105,000.

Jul 17, 2023

I own a 2016 GMC 3500 Diesel that had a serious mechanical breakdown while traveling on the freeway. The truck lost all motive power and needed to coast across 4 freeway lanes. Once towed to a local GMC Dealer, they diagnosed the problem as the Bosch CP4 fuel pump internally came apart while driving. I have to have this vehicle working so I got it repaired at a cost of $16,145. This is a known issue and losing all power while at highway speeds could have caused a serious incident. Please address this issue before someone dies.

Jul 17, 2023

I own a 2016 GMC 3500 Diesel that had a serious mechanical breakdown while traveling on the freeway. The truck lost all motive power and needed to coast across 4 freeway lanes. Once towed to a local GMC Dealer, they diagnosed the problem as the Bosch CP4 fuel pump internally came apart while driving. I have to have this vehicle working so I got it repaired at a cost of $16,145. This is a known issue and losing all power while at highway speeds could have caused a serious incident. Please address this issue before someone dies.

Jul 25, 2018

TL* THE CONTACT OWNS A 2016 GMC SIERRA 3500. WHILE PASSING A BOAT RAMP HAULING A BOAT TRAILER, THE BRAKES AND STEERING FAILED TO FUNCTION. THE CONTACT WAS ABLE TO MANEUVER THE VEHICLE AND NOTICED THAT THE SERPENTINE BELT BECAME DETACHED. THE CONTACT WAS ABLE TO RECONNECT THE SERPENTINE BELT. THE VEHICLE WAS TAKEN TO LEGACY BUICK GMC (293 E HOWZE BEACH RD, SLIDELL, LA 70461, (985) 231-5256) WHERE IT WAS AWAITING DIAGNOSTIC TESTING. THE MANUFACTURER WAS NOTIFIED. THE FAILURE MILEAGE AND VIN WERE NOT AVAILABLE. *TT

Jul 25, 2018

TL* THE CONTACT OWNS A 2016 GMC SIERRA 3500. WHILE PASSING A BOAT RAMP HAULING A BOAT TRAILER, THE BRAKES AND STEERING FAILED TO FUNCTION. THE CONTACT WAS ABLE TO MANEUVER THE VEHICLE AND NOTICED THAT THE SERPENTINE BELT BECAME DETACHED. THE CONTACT WAS ABLE TO RECONNECT THE SERPENTINE BELT. THE VEHICLE WAS TAKEN TO LEGACY BUICK GMC (293 E HOWZE BEACH RD, SLIDELL, LA 70461, (985) 231-5256) WHERE IT WAS AWAITING DIAGNOSTIC TESTING. THE MANUFACTURER WAS NOTIFIED. THE FAILURE MILEAGE AND VIN WERE NOT AVAILABLE. *TT