The truck is unable to communicate with the scanner. Is powers up from the port but says unable to connect. All fuses have been checked and are good.
The security light comes on solid after sixty seconds with key on. It never goes off.
The truck cranks and starts for a quick second but will not stay running.
I replaced the passlock key housing, the key cylinder with new key and the ignition wiring harness but no luck.
I am debating whether to have it towed to dealer or try buying a new PCM. I have had four tech guys try to figure it out but no luck. I did the relearn of the new key. Key in start position, wait ten minutes, light stops blinking and repeat three times. It seems to have learned the key because light stops blinking, but the light comes back solid after sixty seconds like it is a different problem.
Any help would be appreciated and thanks Ken for the response!
2000 Chevrolet Express 3500 diesel
Wednesday, September 2nd, 2020 AT 2:09 PM