Join Date: Jan 2009
Location: Not necessarily Humbolt County
Wiggle the key and see if it does anything. Also, cycle the tilt column up and down. There are several circuits on the ignition switch and one is power for the TCM. You could have a back switch or bad connection. Mine did. I kept getting TCM comm errors.
Just a suggestion.
Edit: Forgot something. The TCM is powered via IGN 1. Can you check the voltage? I believe the fuse is post ignition switch so if it's low, it maybe indicate a faulty switch. Since the switch switches several circuits you can lose one (like TCM power) and not others.
2005 Chevy Silverado 3500LT SRW D/A CC/LB LLY 4x4 (loaded)
LBZ MP, TxCAI, PS Cooler, stack seal, Edge Insight CTS + EGT + EOT, E837 HD Radiator + Aux Radiator w/fan, Earl's trans cooler, mass/IAT shield, LML manifold, SD rotors
NuWa Hitchhiker II LS 29.5LKTG 5th Wheel
Last edited by terryk; 01-26-2013 at 09:23 PM.