2012 Gmc Sierra 1500 Electrical Problems
8 owner-reported electrical complaints from NHTSA data
Data sourced from NHTSA public database. For informational purposes only. Always consult a qualified mechanic.
Owner Complaints (8)
You purchased a 2012 GMC Sierra 1500 that showed 111,000 miles at sale, but the odometer reading was actually 243,000 miles when you registered it. The vehicle's service records show it was serviced at 149,000 and 179,000 miles, but the registration documents indicate those same mileage numbers, which doesn't match the actual mileage history. This appears to be odometer fraud, and you've filed a police report with the Dillon Police Department. Resolving this will likely require working with law enforcement and potentially pursuing legal action against the seller.
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Your vehicle suddenly lost all electrical power while driving, causing you to lose control and collide with a guardrail. All warning lights on your dashboard illuminated at the moment of the failure. The vehicle regained power after the crash and was still drivable, but the underlying electrical problem was never diagnosed. This could involve issues with the battery, alternator, or main electrical connections that need professional inspection.
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When driving at 50-60 mph or any speed, your tachometer needle jumps erratically and the engine surges, making it feel like the car might stall. This could indicate an issue with engine fuel delivery, ignition timing, or sensor malfunctions. A mechanic will likely need to scan for engine fault codes and inspect the fuel injectors, ignition system, and engine sensors.
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Your dashboard near the passenger side airbag has developed a crack. A dealer inspection determined that the entire dashboard needs to be replaced to fix this issue. The problem appeared at 22,000 miles.
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WHILE MOVING WITH TRANSMISSION IN DRIVE, THE IGNITION SWITCH CAN BE SWITCHED OFF. BY DOING SO, THE POWER STEERING AND BRAKES FAIL TO FUNCTION PROPERLY. THE STEERING WHEEL WILL LOCK, NOT ALLOWING TO STEER. THERE HAVE BEEN A SAFETY CONCERNS WITH OTHER GM PRODUCTS, WHY NOT THIS MODEL? THIS IS A SAFETY CONCERN.
CHECK ENGINE LIGHT ILLUMINATED. TOOK TRUCK TO LOCAL CHEVROLET DEALER FOR REPAIR AND THEY DISCOVERED THE WIRES HAD BEEN CHEWED THROUGH. I READ THAT GM USES PEANUT OIL ON WIRES IN ORDER TO INSTALL THEM EASIER. LOOKS LIKE THIS ATTRACTED A MOUSE, SQUIRREL, CHIPMUNK, OR OTHER CREATURE AND IT CHEWED THE WIRES. LUCKILY IT DID NOT AFFECT THE OPERATION OF THE TRUCK BUT IT COULD HAVE LED TO A SHORT CIRCUIT THAT COULD HAVE CAUSED A FIRE. I FEEL THIS NEEDS TO BE THOROUGHLY INVESTIGATED. AND GM NEEDS TO CREATE SOME KIND OF ANIMAL REPELLANT TO SPRAY ON THE WIRES AFTER VEHICLE ASSEMBLY.
APPARENTLY GM USES PEANUT OIL TO LUBRICATE WIRING SO THEY CAN MORE EASILY INSULATE, ETC (ACCORGING TO THE GM DEALER). THIS ATTRACTS RATS AND MICE WHICH CHEW UP THE WIRING - POTENTIALLY IMPACTING SENSORS AND OTHER ITEMS CONTROLLING CRUISE, STABILITY/TRACTION CONTROL, AND ANY NUMBER OF ELECTRICAL SYSTEMS THAT THE DRIVER MAY BE RELYING UPON FOR SAFETY. I ACTUALLY HAD MAP SENSOR WIRES CHEWED UP THAT DISABLED MY STABILITY/TRACTION SYSTEMS AND INHIBITED ENGINE PERFORMANCE. LUCKILY FOR ME IT HAPPENED IN MY DRIVEWAY RATHER THAN ON THE HIGHWAY. DEALER CLAIMS IT IS NOT WARRANTY ITEM EVEN THOUGH CAUSED BY A PROCESS THAT GM ELECTS TO USE IN BUILDING THE VEHICLE. THIS COULD IMPACT ANY/EVERY VEHICLE THAT GM BUILDS WITH USE OF PEANUT OIL (MAY INDEED BE ALL OF THEIR MODELS). *TR
VEHICLE WAS TAKEN TO GMC DEALER FOR HEADLIGHT DEFECT AND WE WERE INFORMED THAT THEY WOULD HAVE TO ORDER PARTS. DROVE TRUCK BACK TO SITE AND WHILE TRUCK WAS RUNNING BUT STATIONARY SMOKE WAS OBSERVED COMING FROM THE ENGINE COMPARTMENT. WHEN THE HOOD WAS RAISED THE ENTIRE TRUCK BECAME ENGULFED AND COMPLETELY BURNED. *TR