2012 GMC Sierra 2500 Electrical system Problems
- Complaints
- 4about this part
- Share
- 13%of 31 total for the year
- Median mileage
- 67,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the electrical system of the 2012 GMC Sierra 2500, 13% of the 31 complaints for this model year. Where a mileage was given, the median is 67,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Driving on the expressway around 60 mph when the truck went into limp mode slowing me down to 40 and then would not shift gears Tcm went out gm told me that there is a big problem”
NHTSA complaint #11542551, filed 2023-09, 126,393 miles“The contact owns a 2012 Gmc SIERRA 2500. The contact stated that the vehicle stalled when turning the key in the ignition switch. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was 67,000.”
NHTSA complaint #10678363, filed 2015-01, 67,000 miles“The contact owns a 2012 Gmc SIERRA 2500. When using the snow plow, the headlights dimmed and the heat decreased as if it were turned off. The contact mentioned that the volts decreased when using the plow, which may have caused the failure. The vehicle was taken to the dealer, but the cause of the failure could not be diagnosed. The manufacturer was made aware of the failure and sent an investigator to diagnose the vehicle. The vehicle was not repaired. The VIN was not available. The failure mileage was 18,500.”
NHTSA complaint #10824851, filed 2016-02, 18,500 milesRelated service bulletins
- 11017252Mar 28, 2025This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.
- 11017031Mar 12, 2025This service bulletin provides information to diagnose batteries that have set for a long period of time and/or cold weather climates and testing those batteries.
- 11014230Jan 31, 2025This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 11013069Jan 9, 2025This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 11011805Dec 6, 2024This Preliminary information communicates a GM part number for reflective high temperature heat or insulating tape when repairing wiring harnesses.
- 11009156Oct 25, 2024This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester…
- 11010421Oct 3, 2024This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
- 11007196Sep 6, 2024This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the…
- 11006621Aug 26, 2024Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which…
- 11007116Aug 6, 2024This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 5 | 38% |
| 2025 | 1 | 4% |
| 2024 | 33 | 31% |
| 2023 | 6 | 18% |
| 2022 | 12 | 27% |
| 2021 | 6 | 12% |
| 2020 | 13 | 16% |
| 2019 | 9 | 28% |
| 2018 | 7 | 20% |
| 2017 | 6 | 16% |
| 2016 | 9 | 15% |
| 2015 | 11 | 12% |
| 2014 | 4 | 13% |
| 2013 | 3 | 7% |
| 2012 | 4 | 13% |
| 2011 | 9 | 14% |
| 2009 | 7 | 23% |
| 2008 | 3 | 5% |
| 2007 | 5 | 6% |
| 2006 | 4 | 6% |
| 2005 | 42 | 37% |
| 2004 | 48 | 34% |
| 2003 | 36 | 23% |
| 2002 | 1 | 1% |
| 2001 | 4 | 3% |
| 2000 | 3 | 6% |
| 1999 | 2 | 6% |
| 1998 | 1 | 7% |
Other parts of the 2012 GMC Sierra 2500
8 complaintsOther or unknown
7 complaintsFuel system
5 complaintsBody and structure
4 complaintsTransmission and drivetrain
4 complaintsEngine
3 complaintsTires
2 complaintsSuspension
1 complaintsVehicle speed control
1 complaintsWheels
1 complaints
← All problems reported for the 2012 GMC Sierra 2500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology