I am looking for some help on a 2005 Chevy pickup with a 4.3L. The truck blew a head gasket so I replaced the head gasket, hooked all the wires back up, and tried to start it. Truck would not even click, the dash reads Unknown Driver. I tried to reset the truck by turning the key on for 10 minutes and off for 5 seconds and back on repeating 3 times. I tried this 30 minute process 3 times. I also tried to reset the truck by disconnecting the battery and touching the leads together for 10 seconds. I also replaced the ECM with a brand new one. Also the truck will not talk to my scanner. Please help me.

 

I’m having the same issue did you ever find a solution

 

Welcome from Florida. Go back and double check that all wires are connected to the correct places and make sure that all grounds are making good contact.