One problem related to wiring has been reported for the 2002 Chevrolet 1500. The most recently reported issues are listed below.
On December 19th 2013 was at a class for work about 65 miles from home, when came out of class and truck would not start keep getting security light flashing in the information window. Later found out this cut the gas of from someone stealing the vehicle, but I had the original key to the truck. Had to have vehicle towed back to my home 65 miles away. A certified mechanic looked at the truck for me and said he believed he had fixed it by replacing the ignition wiring harness. Truck worked great until recent I was traveling down a the highway at 65mph and the key to the vehicle fell out of the ignition onto the floor, lucky for me the vehicle stayed running. I have recently been looking at the ignition and have found that any position that the key is in rather it be running or auxiliary the key can be removed from the ignition. Also the truck is back to showing the security light flashing in the information center and truck will not start. I have to leave the key in the on position and wait 10 minutes before the truck will start. This seems to be a problem with chevy!!!!!!!.