2009 GMC Sierra 1500 electrical system problems
20 owner complaints filed with NHTSA name the electrical system on the 2009 GMC Sierra 1500 — 9% of all complaints for this model year.
What owners report
“TCM and electrical transmission grounded out TCM IN MY RESEARCH a lot of people are having issues with these. Dealers are of no help “backordered” so having to rebuild them. This is an expensive failure!”
filed Jan 7, 2024
“While driving on Saturday, July 29th, I went to make a right turn @ intersection of Nottingham Way onto Ledo Rd. The vehicle started jerking and suddenly shutoff. I had no power steering, No power brakes. I had to manually steer and stop the truck into the median, while avoiding oncoming traffic. I…”
filed Jul 31, 2023
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.
23-NA-001 · Service Bulletin/Repair Instructions · issued Mar 28, 2025
Electrical System problems in other Sierra 1500 years
| Year | Reports | Share |
|---|---|---|
| 2026 Sierra 1500 | 8 | 12% |
| 2025 Sierra 1500 | 21 | 23% |
| 2024 Sierra 1500 | 39 | 12% |
| 2023 Sierra 1500 | 55 | 13% |
| 2022 Sierra 1500 | 79 | 15% |
| 2021 Sierra 1500 | 71 | 13% |
| 2020 Sierra 1500 | 77 | 17% |
| 2019 Sierra 1500 | 94 | 15% |
| 2018 Sierra 1500 | 42 | 14% |
| 2017 Sierra 1500 | 54 | 15% |
| 2016 Sierra 1500 | 54 | 16% |
| 2015 Sierra 1500 | 93 | 13% |
Other reported problem areas on the 2009 GMC Sierra 1500
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.