Gray Ghost Silverado

iTrader: (1)

Yes.... Well sort of.The codes I have been able to get are:

U0100- Lost Communication with ECM/PCM A
U0101- Lost Communication with TCM
U0102- Lost Communication with Transfer Case Control Module.
U0121- Lost Communication with Electronic Brake Control Module.
U0140- Lost Communication with Body Control Module

And OCCASIONALLY a U0155 and U1814. But they seem to go away.

It also throws a CXXXX code. :/

Spoolin

iTrader: (8)

Damn dude, this sucks to hear! I thought I was having some electrical gremlins but damn. Best of luck dude!

Gray Ghost Silverado

iTrader: (1)

Thanks bud!

I am uploading some video's on Youtube so you all can see exactly what it is doing.

01WS6/tamu

iTrader: (36)

Did you check all the fuses in the IP fuse boxes on the left and right side of the dash.

01WS6/tamu

iTrader: (36)

Find a used bcm for your truck even if it's not uplevel. Get it as cheap as possible to use it for diagnostic purposes only. Stick it in your truck and see if you can get the modules online correctly. Man if it was in my shop I could do a lot better for ya esp computer diagnostics are a PITA. Reading around it all data the modules are not seeing the correct wake and sleep cycles on the high speed buss. These cycles are directly controlled by the bcm. I really think the bcm turned turtle.

If you are in a real spot I can order a gm bcm for you and program it to your vin.

Gray Ghost Silverado

iTrader: (1)

Ok well, before we go any further, check this **** out, just to make sure.

Gray Ghost acting weird part 1 - YouTube

I have part 2 uploading right now. I'll get it up ASAP.

Gray Ghost Silverado

iTrader: (1)

Here's the other one:

Gray Ghost Acting Weird Part 2 - YouTube

smokeshow

iTrader: (16)

What did you end up doing with the FPCM? Is it functional, or whats the story?

Gray Ghost Silverado

iTrader: (1)

Just pulled the fuse. Even if I reinstall it, nothing happens.

smokeshow

iTrader: (16)

Almost like the GMLAN wires were cut between TCM and BCM...