2026 GMC Sierra 1500 · symptom sheet
Engine stalls or loses power while driving
- 39owner reports
- 3,202median miles
- 0involved a crash
Newest report Sep 29, 2026 · checked Oct 2, 2026
111 of the 128 complaints on this car are about the engine. 39 of those describe stalling. Only engine failure is reported more often on this car.
Tick what matches of 39 reports
Stalling on other Sierra 1500 years
Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2016, 2018, 2025.
What this problem usually is
Stalling reports are some of the most alarming on the site. The engine quits while the car is moving, sometimes on a highway and sometimes at a stop. Many owners say it restarted right away and the dealer found no stored code, which is part of why these complaints pile up before anything gets fixed.
What got replaced
Owners who name the part that was replaced mention the engine (6 reports) and the battery (5 reports).
Recalls and investigations
One recall on the engine covers the 2026 model year. A recall on the same system isn't always the same failure, so read the defect text.
A component missing from the drivetrain transfer case may cause the front and/or rear wheels to lock up without warning to the driver.
All 2 recalls on the 2026 GMC Sierra 1500, with the owner complaints on each recalled system
NHTSA investigations into the engine on the Sierra 1500
Loss of motive power due to engine failure post recall remedy. Open.
Loss of motive power due to engine failure post recall remedy. Closed aug 20, 2026.
Loss of motive power due to engine failure. Open.
Loss of motive power due to engine failure. Closed oct 23, 2025, led to recall 25V-274.
Pedestrian alert sounds. Closed aug 7, 2023, led to recall 22V-063.
Non-crash engine compartment fires. Closed sep 8, 2008, led to recall 08V-441.
Non-crash engine compartment fires. Closed jun 12, 2008.
When it happens
The middle half of failures fell between 1,861 and 6,000 miles, from the 16 reports that gave a mileage.
What owners wrote
“The vehicle lost power after sitting for a week. start up with a jump, but the battery doesn't hold a charge after that.”
Filed Sep 29, 2026
“Was driving the vehicle and started making a loud knocking noise and had a loss of power.”
Filed Sep 12, 2026
“I was driving on 96 W. in slow traffic on the freeway when the vehicle put itself in neutral and shut off”
Filed Aug 4, 2026
“While driving vehicle the engine lost power and shut off in traffic. There were no warning signs of issues at that time. The dashboard went blank and then reappeared and the truck was in park. after that the truck would not shift gears. The truck was towed to the dealership and found to have had catastrophic engine failure.”
Filed Jul 13, 2026
Should you keep driving it?
This page can't tell you that. 0 of 39 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Paid for this repair before a recall covered it? How recall reimbursement works
Other problems on this car
- Engine failure, knocking or rod bearing 54 reports