GMC C Series Electrical problems by year

First we were driving out of town and the radio start going on and off, the locks began going up and down until the truck lost power. The truck loses power with out any reason. We have check the battery, everything with out being able to determine why. After few minutes the truck starts up and everything goes back to normal. I am concerned that one of these days the truck is going to suddenly stop and my son could get into an accident. I bought this truck for my son to go to school and I don't feel he is safe on it for this electrical or ignition problem. *Tr

Wiring harness under driver side dash melting shorting fuse panel, unable to use passenger side window, nor remote lock/entry on passenger side. *Tr

I bought two new gmc vehicles, an acadia and a sierra 1500 pickup truck. While under warranty the door locks started sticking and had to be repaired. A few months later it started again. I took it back to the dealership and was told it was now out of warranty. The service manager refused to repair them with out a $500.00 Charge for each door. I refused being very disappointed that I would buy two vehicles and receive such service after bailing out the company as a tax payer. All companies that were bailed...

A new distributor cap and rotor has been replaced 2 times within a 6 month period. The vehicle tries to start but it doesn't catch and then sounds like it's trying to back fire. The ac coil is leaking on to the cap and producing moisture which is why it will not start or stalls and will not start back up. Gmc says they have had no problems with other vehicles and my mechanic said that they can't do anything until it happens again. This is my 3rd gmc van and have never had these kind of problems or I wouldn't have purchased the 2nd one. I'm very disappointed!