2026 GMC Sierra 1500: engine stalls while driving

Filed Oct 6, 2026 · Engine, Fuel system · LA

While driving on a public road, the 6.2L L87 V8 stalled without warning. There was heavy smoke and an oil trail of about 300 yards behind the truck. The engine would not restart, and the transmission would not shift into neutral. The truck was moved a short distance off the road and towed the next day to the selling GMC dealer. Odometer was 4,663 miles. Oil life remaining was 38 percent. The truck was stock, with no modifications, and was operated on premium fuel. No warning lamp was noticed before the stall. The failed engine is at the dealer and currently under inspection. The dealer inspection is not finished, and no written cause has been provided. This is a sudden loss of propulsion. Please associate this report with Engineering Analysis EA26005 concerning connecting-rod and crankshaft failures in the GM 6.2L L87 engine.

Filed Sep 29, 2026 · Transmission · TX

engine stall on the highway

Filed Sep 16, 2026 · Electrical, Engine · 6,000 miles · NC

The contact owns a 2026 GMC Sierra 1500. The contact stated that while driving 35 MPH, the vehicle stalled. Additionally, the wheels locked up, and transmission made a screeching sound. The contact was able to restart vehicle after approximately 5 minutes. The failure was recurrent. The vehicle was towed to the dealer, but the dealer was unable to duplicate the failure. The dealer replaced an unstated module that was damaged during the failure. The manufacturer was contacted by phone and was made aware of the failure. The failure mileage was approximately 6,000.

Filed Jul 31, 2026 · Engine · KY

Engine died while driving at higher speed on interstate. Barely able to pull to emergency lane before truck stopped. No warning of any issues with it. Had towed to dealership. Dealership confirmed 6.2 engine was faulty. Engine replaced under warranty. Truck only had 1207 miles on it when engine died.

Filed Jun 1, 2026 · Engine · TN

While driving approximately 45 MPH, I slowed to make a right turn into a parking lot. The engine suddenly stalled and lost all propulsion. The vehicle retained electrical power but automatically shifted into NEUTRAL, and would not shift back into DRIVE. I braked to a stop, temporarily stranding the vehicle and blocking traffic in the parking area. Attempting to turn the vehicle off via the START/STOP button actually restarted the engine, confirming the stall. The truck then shifted into DRIVE and operated normally. A subsequent OnStar diagnostic scan found no active trouble codes.

Filed Apr 5, 2026 · Engine, Transmission · TX

The motor on my 2026 GMC Sierra stalled 2 weeks ago with a p0016(crankshaft position sensor issue). Was able to clear code and limp home. Vehicle did stall on a busy road and stop abruptly. Scheduled service and was advised to drive it in. Was experiencing irregular idle when warmed up, and a slight hesitation in the pedal. Service advisor started the vehicle and claimed no codes, and everything appear OK. Later in the afternoon the service advisor called to inform me that the vehicle had a siezed engine and had siezed during a test drive on the highway. Currently waiting on warranty information, and engine replacement information but i've been informed it will require a whole new engine. This is the same 6.2l L87 V8 that has been in near constant recalls from GMC over the last 6 years.

Filed Mar 23, 2026 · Engine · NY

MY 2026 GMC Sierra AT4 1500 6.2 L87 engine had a catastrophic failure with only 3347 miles. It stalled twice while driving home, when pulling into my driveway it stalled a third time and would not start after that. Before having my vehicle towed to the Dealer from my home I connected my code reader and it posted code P0016. After being diagnosed by the dealer they informed me I needed an entire new engine. There were no warning lights or message prior to this failure My vehicle was purchased 9 week prior.

Filed Feb 19, 2026 · Electrical, Engine · TX

Vehicle stalled in busy intersection in McKinney Texas , unable to start are shift into a neutral position on transmission to remove from extreme dangerous intersection, sheriff advised that road side assistance that was contacted is not going to be in time (90min)to keep from causing an ongoing traffic backup , sheriff dispatched their own towing service to resolve the situation from getting extremely dangerous .vehicle and my wife was towed to McKinney Buick gmc dealership.