One problem related to wiring has been reported for the 2003 GMC Sonoma. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 GMC Sonoma based on all problems reported for the 2003 Sonoma.
While traveling on the highway engine check light appeared on the dashboard. The vehicle was towed to the dealership on three occasions and was told the problem was possibly the wiring harness.
| Wiring problems | |
| Electrical System problems |