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38 complaints
GMC SIERRA 1500 2026 ENGINE
high
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 shift
NHTSAUSMay 2026Source →
GMC SIERRA 1500 2026 POWER TRAIN
low
While driving on the highway, the steering became much more stiff, and then I heard metallic clanging sounds for a few seconds. The dashboard said press start to start Vehicle. I pressed start while
NHTSAUSMay 2026Source →
GMC SIERRA 1500 2026 ENGINE
low
Heard clanging noise under hood as I was driving and truck just stopped. Tried to restart and nothing! Towed to dealership where they found the engine has to be replaced.
NHTSAUSMay 2026Source →
GMC SIERRA 1500 2026 ENGINE
medium
The contact owns a 2026 GMC SIERRA 1500. The contact stated while driving 40 MPH, the vehicle independently engaged into limp mode. A dealer was contacted. The vehicle was towed to the dealer where it
NHTSAUSMay 2026Source →
GMC SIERRA 2500 2026 ELECTRICAL SYSTEM
high
During normal use, the factory wireless phone charging pad in the center console overheated, produced visible smoke inside the cabin, and melted the charging surface area. No liquids or foreign metal
NHTSAUSMay 2026Source →
GMC SIERRA 1500 2026 STRUCTURE:BODY
low
The tailgate intermittently opens while driving or parked
NHTSAUSMay 2026Source →
GMC SIERRA 1500 2026 ENGINE
low
6.2 ENGINE BLEW UP 3000 MILES
NHTSAUSApr 2026Source →
GMC SIERRA 1500 2026 ENGINE
low
I bought the truck brand new from Gregg Young in Atlantic, IA. While an hour into the drive home, the truck began shuttering as if the transmission was having problems finding the gear. I immediately
NHTSAUSApr 2026Source →
GMC SIERRA 2500 2026 SERVICE BRAKES
low
Brand new delivery there was a noise that changes with engine RPM. It also changed with turning the steering wheel. The dealer diagnosed a bad power steering pump. Due to possible metallic contamina
NHTSAUSApr 2026Source →
GMC SIERRA 1500 2026 POWER TRAIN
low
Transmission Cooler line blew out
NHTSAUSApr 2026Source →
GMC SIERRA 1500 2026 ENGINE
medium
Complete engine failure at 1838 miles. Need complete engine replacement. Estimated time unknown for replacement parts.
NHTSAUSApr 2026Source →
GMC SIERRA 1500 2026 ENGINE
medium
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. Schedule
NHTSAUSApr 2026Source →
GMC SIERRA 1500 2026 POWER TRAIN
low
ENGINE LOCK UP WITH 5018 MILES ON, IT IS A THE 6.2 MOTOR ROD AND CRANK BAD
NHTSAUSApr 2026Source →
GMC SIERRA 2500 2026 STEERING
medium
I recently purchased my vehicle from Big Star Dealership in Baytown Tx. At a little over 1000 miles i was towing a camper. The vehicle stalled, fuel pouring from engine. It was towed and repaired d
NHTSAUSApr 2026Source →
GMC SIERRA 1500 2026 STEERING
medium
I had this truck as brand new for approximately 24 hours when it had a major failure. It had 450 miles on it at time of purchase, but was sold as new. While driving at 45MPH it had a check engine ligh
NHTSAUSMar 2026Source →
GMC SIERRA 1500 2026 ENGINE
medium
Driving on the PA turnpike at speed with traffic and the engine lost power and started squealing. No lights came on, I was able to get to the side of the road and the truck shut off. When I restarted
NHTSAUSMar 2026Source →
GMC SIERRA 1500 2026 ENGINE
low
Driving approximately 30mph, the engine shut down. Vehicle shifted into neutral until stopped and shifted to park. Unable to place in neutral to pull off the road. Check engine stated transmission nee
NHTSAUSMar 2026Source →
GMC SIERRA 1500 2026 ENGINE
medium
Total engine failure at highway speed with loss of propulsion . Catastrophic engine loss with 3,000 miles . GMC never fixed the problem with the 6.2 l87 like they said
NHTSAUSJan 2026Source →
GMC SIERRA 1500 2026 LANE DEPARTURE: ASSIST
medium
GMC SUPER CRUISE MALFUNCTION NO WARNING BEFORE SUPERCRUISE SHUTS OFF PASSING A CAR ON FOUR LANE HIGHWAY (SUPER CRUISE ENABLED) SUPER CRUISE SHUT OFF AND TRUCK CONTINUED HEADING FOR THE CENTER GAURD RA
NHTSAUSJan 2026Source →
GMC SIERRA 1500 2026 POWER TRAIN
low
26’ GMC Sierra 1500 AT4 3.0l Duramax experiencing Harsh shifting occurring sporadically while accelerating and deceleration. More frequent and severe during quick deceleration. Severe clunking/rear
NHTSAUSJan 2026Source →