I used the remote to unlock the truck. since then the headlights and running lights ( i believe it to be the daytime running lights ) will not turn off. Service advance track light is on, No wiper or turn signals ( wipers work in high speed only ) no head light controls ( cannot turn them on or off or use High or low beams. I have the SCCM disconnected and the head light switch removed. The lights will still not turn off. The fog light indicator light is on next to the headlight switch, but the fog lights are not on. I have checked ever fuse, but am out of ideas to try. The connector above the parking break has been removed and inspected and reconnected. Scan shows U0212 for several modules. Where do I start here? I am willing to turn this thing upside down to figure this out. Right now I have to disconnect the batteries so the lights dont run them dead.

Are the headlights controlled by the PCM?

U0212 Lost Communication With Steering Column Control Module: No Sub Type Information

There is sub info. Just about every module that communicates with the SCCM shows that code. My big concern is why will the head lights not shut off. The only way I can get them to shut off with the battery connected is to disconnect the BCM. I dont know much about the Body control module and if it could be the culprit. I have a new SCCM coming this week but have my doubts if it will fix the problems.

check these and see if any help

Awesome. Thank you.

Curious thing when looking at the second diagram. I noticed a few weeks ago that it would loose the GPS signal in area's where it shouldn't. constantly getting signal and loosing it. I really didn't think anything of it. The truck had been sitting about 2 weeks and I drove it across town without incident the night it started giving me problems. Me letting it sit for long periods of time probably isnt helping. I am wondering if that SBP29 Gray-red wire may be the culprit. the other systems on that wire could be part of the problem, but the description is kind of vague. Thank you again and I will get out there looking again tomorrow.

Thanks for the help

Just a follow up. I did not replace any parts, but the problem is fixed. For some reason when I disconnected the Ground from the battery to a 500 amp relay I have, all the problems went away and its back to normal. The relay on or off didnt make a difference, just disconnecting the ground. I am going to add a grounding block and a few ground straps to the truck and hook the Relay back up this weekend. I must have a poor chassis ground somewhere on the truck.