2003 Chevrolet Avalanche 1500 electrical system problems
Owners reported electrical system problems in 85 complaints for the 2003 Chevrolet Avalanche 1500, 40% of the complaints on file. It is the most reported problem area for this model year.
At a glance
- Complaints
- 85 40% of this year's complaints
- Typical mileage
- 85,000 miles 72 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 | 0 |
| 20k to 40k miles | 1 |
| 40k to 60k miles | 18 |
| 60k to 80k miles | 15 |
| 80k to 100k miles | 17 |
| 100k to 120k miles | 10 |
| 120k to 140k miles | 3 |
| 140k to 160k miles | 2 |
| 160k to 180k miles | 1 |
| 180k to 200k miles | 1 |
| 200k+ miles | 4 |
What the data shows
Of the 72 electrical system complaints that report mileage, the median is about 85,000 miles, and 26% were reported before 60,000 miles.
These complaints mention 1 fire.
What owners wrote
2003 chevy avalanche caught on fire from defective wires behind radio panel that shorted. Burned all the wiring and smoked the vehicle.
My 2003 chevy avalanche z-66 has just now developed speedometer problems and I am sorry it is a safety issue and concern but general motors has brushed it off as no case closed. My speedometer started acting weird,it only works for short distance driving then either shows last speed obtained or zero. My example for GM is this: no other GM vehicle I purchase ever had this problem and even though you may not think of it as a safety issue perhaps you might rethink this thought by getting into a vehicle where the…
Other problems reported for the 2003 Chevrolet Avalanche 1500
- Brakes 55 complaints