2003 GMC Sierra electrical system problems
Owners reported electrical system problems in 31 complaints for the 2003 GMC Sierra, 12% of the complaints on file. It is the 2nd most reported problem area for this model year.
At a glance
- Complaints
- 31 13% of this year's complaints
- Typical mileage
- 62,000 miles 26 complaints with mileage
- Crashes and fires
- 0 and 1
- Injuries and deaths
- 0 and 0
Source: NHTSA owner complaints
When electrical system problems show up
View the numbers
| Mileage | Complaints |
|---|---|
| 0k to 20k miles | 3 |
| 20k to 40k miles | 4 |
| 40k to 60k miles | 5 |
| 60k to 80k miles | 5 |
| 80k to 100k miles | 4 |
| 100k to 120k miles | 2 |
| 120k to 140k miles | 0 |
| 140k to 160k miles | 0 |
| 160k to 180k miles | 1 |
| 180k to 200k miles | 1 |
| 200k+ miles | 1 |
What the data shows
Of the 26 electrical system complaints that report mileage, the median is about 62,000 miles, and 46% were reported before 60,000 miles.
These complaints mention 1 fire.
What owners wrote
On may 31st, the rear end differential assembly exploded sending the pinon thru the housing and the rear axle caught on fire. The truck was in the shop (perry cheverolet, inc., columbia, mo)until 6-9-03. When I arrived in bozeman, mt on 7-2-03 I was having problems with the wiring. There was a fire when I plugged the rv electrical plug into the truck's trailer plug. There was also a blown rear tail light bulb. In bozman, they replaced the complete wiring harness, the tow receptacle and 2 fuse kits.
The speedometer in the truck registers false MPH. For example when parked the speedometer reads 50 MPH, when traveling on the road the speedometer will register 80 MPH and the actual speed may be only 30 MPH.
Other problems reported for the 2003 GMC Sierra
- Brakes 86 complaints
- Steering 28 complaints
- Transmission 17 complaints