One problem related to ignition switch has been reported for the 1999 GMC Sonoma. The most recently reported issues are listed below.
The contact owns a 1999 GMC Sonoma. While driving 72 mph on the highway, the vehicle lost all power and the power steering failed. After the vehicle stalled, all the lights illuminated on the instrument panel. The vehicle was towed to a dealer where it was diagnosed that the ignition switch needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 156,000.
| Fuses And Circuit Breaker problems | |
| Underhood Wiring problems | |
| Ignition Module problems | |
| Ignition Switch problems |