2003 Chevrolet Suburban electrical system problems
81 owner complaints filed with NHTSA name the electrical system on the 2003 Chevrolet Suburban — 27% of all complaints for this model year.
What owners report
“Odometer Fraud. The contact purchased a 2003 Chevrolet Suburban. It was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 291,000 and at the time of inspection, it was discovered that the odometer was tampered with, and…”
filed May 21, 2026
“Tl* the contact owns a 2003 chevrolet suburban. At various times, the ignition switch failed and all the warning indicators illuminated. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 225,000.”
filed Jan 17, 2017
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, 2025This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8…
PIP4723J · Service Bulletin/Repair Instructions · issued Oct 25, 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 modules need updating and then proceed to…
General Communication · Service Campaign · issued Aug 26, 2024
Electrical System problems in other Suburban years
| Year | Reports | Share |
|---|---|---|
| 2024 Suburban | 4 | 11% |
| 2023 Suburban | 13 | 11% |
| 2022 Suburban | 18 | 17% |
| 2021 Suburban | 17 | 9% |
| 2020 Suburban | 8 | 19% |
| 2019 Suburban | 7 | 9% |
| 2018 Suburban | 16 | 20% |
| 2017 Suburban | 21 | 15% |
| 2016 Suburban | 26 | 12% |
| 2015 Suburban | 58 | 14% |
| 2014 Suburban | 7 | 12% |
| 2013 Suburban | 14 | 12% |
Other reported problem areas on the 2003 Chevrolet Suburban
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.