Three problems related to wiring have been reported for the 2001 GMC Sierra. The most recently reported issues are listed below.
Failure of abs module caused abs light and red service brake lights to come on. Replacing both front hub bearings (including both front abs sensors and wiring) and repairing the ground strap on the frame for the abs system did not fix the problem. Service brake system has new calipers ,rotors,and pads and a full inspection revealed no problems or failures. Abs module is still on vehicle but will be replaced next.
The harness wiring on the steering which controlled the headlights overheated and melted. They were so mashed together that they had began to rub against other wires. The wipers and headlights were inoperable. Please provide any further information.
After fuel pump was replaced, the vehicle wouldn't start. While the vehicle was under warranty, it would not start. The fuel pump was changed but not the connector. The problem resurfaced and quit running numerous times. The service dealer stated that the fuel cap was not tight enough which caused this problem. (the cap was tightened) the vehicle stopped running while at a traffic light more than once. The consumer had taken the vehicle to the dealer and had to pay for repairs because the vehicle was then out of warranty. Several weeks later the problem recurred and the service dealer found no gas pressure and replaced the pump. The vehicle stopped again while the consumer was making a left turn. The consumer had taken upon himself to go under the vehicle and wiggled the wiring harness which started the vehicle. The service dealer changed the fuel pump connector harness. (the connector was burned and pitted).