My 2003 Chevy Silverado 2500HD (6 litre gas engine
) won't shut off when I remove the key.
Last year, I ran into the the reduced engine power problem that so many people have had. I found three wires that were broken running to the throttle body. I soldered those back together and truck worked great all year. (great is a relative term - check engine light goes on for anything over 80km/hr, ABS light flashes on and off intermittently, airbag light is always on etc...)
Truck got snowed in this winter (over 500cm in New Brunswick this past winter). When I could finally get it out after a few months of sitting, the battery had died over winter. After boosting the truck it immediately started up in REP and shook like crazy.
I purchased a replacement pigtail connector for the throttle body control and crimped it on and a new battery.
This is my current re-occuring sequence for the truck.
1) I have been disconnecting my battery between truck attempts - as soon as the negative terminal starts to reconnect I can hear the throttle body moving and the fuse box making noise. I have narrowed the noise down to the PCM2 fuse. After tightening negative terminal, the sounds end.
2) Truck starts up fine. No REP. Drives great.
3) When I go to shut truck off there are two options.
a) remove keys and truck stays running indefinitely - pull fuel pump, or PCM 1 or PCM 2 fuse and truck shuts off - then it will start up again perfectly
b) turn truck off and it the engine bangs and rattles a few times and shakes hard before turning off - then I try to start it up and it goes to REP
Based on what I've researched this may be a ground cable situation. However, I've been un-able to locate these ground cables.