2003 Pontiac Bonneville electrical system problems
10 owner complaints filed with NHTSA name the electrical system on the 2003 Pontiac Bonneville — 19% of all complaints for this model year.
What owners report
“Look at the car the car is located [XXX] first of all you start off as a passcode 2 system and then it says passcode 3 system on the thing and I just don't want to deal with this because you have the cut off switch you have the fuel cut off switch but you still have current going through the switch…”
filed Jul 14, 2026
“My car shuts off while driving. I notice it because power steering is hard to use and rpm's go down to zero and car has shut off. It started up again. This has been a real problem. Dealer tested car and said it was a crankshaft sensor. I replaced the crankshaft sensor and the problem continues. Cam…”
filed Aug 13, 2015
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 Bonneville years
| Year | Reports | Share |
|---|---|---|
| 2005 Bonneville | 8 | 30% |
| 2004 Bonneville | 11 | 39% |
| 2002 Bonneville | 10 | 11% |
| 2001 Bonneville | 16 | 12% |
| 2000 Bonneville | 32 | 15% |
| 1999 Bonneville | 22 | 15% |
| 1998 Bonneville | 28 | 10% |
| 1997 Bonneville | 28 | 19% |
| 1996 Bonneville | 21 | 14% |
| 1995 Bonneville | 40 | 16% |
| 1994 Bonneville | 19 | 22% |
| 1993 Bonneville | 18 | 13% |
Other reported problem areas on the 2003 Pontiac Bonneville
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.