we have bucket trucks and pickups at work. I'll see if the mechanics there can read the codes for me... Thanks everyone

 

ok, so far i have a new selection switch in the dash and a new actuator on the front differential... Still NO 4x4... I will check with the mechanics at work on the scaning of the TCCM... I will post as i make progress...

 

motor on the tcase is my guess...

 

Its about the only thing left...

 

Not that bad... Done more than a couple on the lift at work. Doesn't take long to swap it in and test it out. Don't fix it put it back in the box and send it back

 

It's only an extra few hundred for the encoder motor and couple hundred-ish for the TCCM. If that doesn't work, then the only thing left to check is the wiring and fuses.

Why diagnose when you can just replace?

 

The mechanics at work used the GM Tech2 scanner today and it came up as control module or something like that... Which i assume is the TC motor... He reset my ABS light (ABS sensor on front driver is bad) and it re-appeared immediatly... All fuses are good, there are no relays that we know of... We replaced a 20amp fuse for the "service" fuse (???) and the service 4wd light came back on... The new dash selector swith NOW shows the 2wd option lit... It doesn't change regardless of any other buttons pushed - the 2wd light stays lit... He's thinking it might be a bad wire somewhere or bad connections... I don't mind replacing the tc motor if that will fix the problem... We were running short on time tho today, so we will continue the research later... Just wanted to update the progress here... Any more thoughts after hearing this???

 

Wouldn't happen to remember the exact code would ya?

You say 'control module', so I would go in the direction of the Transfer Case CONTROL MODULE, more so than the encoder motor. It would be nice to have the code so we can steer you in a more deffinant direction.

 

I thought the guys from work told me that the control and motor were both part of the motor assembly... I will re-converse with them and get the exact code and some dang answers...

 

Nope. There is a TCCM that is located behind the 4wd buttons on the dash. Then there is the Encoder Motor that is on the side of the t-case. Both are known to go out. Both are expensive.