Thought I had everything fixed with replacing grounds but problems are back even more.

Always "unknown driver". no more "driver 1" *everything works great when in "driver 1".
No security light and starts and drives fine.
BUT
no power windows, locks, stereo, heated seats, etc...
ABS, airbag and battery light are on dash.
Air suspension has lost all air (compressor works fine though).

tech2 cannot access anything while truck is running. comm error.
However when you turn off truck it communicates perfectly fine, no error codes.
With the exception of trying to manually trigger compressor "cannot be performed with truck is moving", ignition is off. Abs says speed is zero but in air sus. control screen it say truck is going 100kmph, lol
Triggered compressor manually by hot wiring relay.

All stuff I believe to be related, reading up im guessing bcm?
Took out air vent and headlight controls and was able to touch bcm, but fml unsure how to get out.

Oh and traction control light turns on when you turn truck off, (little light above tow mode button), lol
And random interior lights stay on?

 

Did you check your ground just below the parking brake pedal? (Lift up on the door sill plate... It snaps in and out. Then grab a hold of the trim piece around the parking brake pedal and pull straight backwards.... That will give you access to that ground lug)

Check your harness, for example in the driver's door flexible piece. It's not uncommon for the wires in there to break and short out.

 

cleaned that ground and most others.