2003 GMC Sierra 2500 electrical system problems
36 owner complaints filed with NHTSA name the electrical system on the 2003 GMC Sierra 2500 — 23% of all complaints for this model year.
What owners report
“Blower motor resistor does not operate. Upon inspection, harness and final stage are damaged due to excessive heat. I need to replace both components because I fear it will cause a fire. Many posts on the same thing. Why is there nothing done about this? My bmw had same issue but it was a recall on…”
filed Apr 1, 2019
“Gmc 2500 diesel hd sle sierra rearwheel drive instrument panay is inoperative. Have to use iphone for speed and guess at gas effecting cruise control interior lights fan speed and cd player”
filed Oct 5, 2017
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
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General Communication · Service Campaign · issued Aug 26, 2024This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and…
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Electrical System problems in other Sierra 2500 years
| Year | Reports | Share |
|---|---|---|
| 2024 Sierra 2500 | 31 | 32% |
| 2023 Sierra 2500 | 5 | 17% |
| 2022 Sierra 2500 | 12 | 29% |
| 2021 Sierra 2500 | 6 | 12% |
| 2020 Sierra 2500 | 12 | 16% |
| 2019 Sierra 2500 | 9 | 28% |
| 2018 Sierra 2500 | 7 | 20% |
| 2017 Sierra 2500 | 6 | 16% |
| 2016 Sierra 2500 | 9 | 15% |
| 2015 Sierra 2500 | 11 | 12% |
| 2014 Sierra 2500 | 4 | 13% |
| 2013 Sierra 2500 | 3 | 7% |
Other reported problem areas on the 2003 GMC Sierra 2500
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.