here's a pic of it
 

Trying to upload pic

You're rear tire looks really pushed back, did you break a spring?

I don't know...no noises or anything out of the ordinary. I'm taking it to a GM dealer in the am...I'm hoping they can re-align the rear axle.
Two mechanics looked at the vehicle...nobody checked the rear!!!
I don't off road and actually baby the truck...maybe that's the problem!

If they did an alignment, they should have looked at the rear end. Doesn't mean they actually did look closely at it, especially if the numbers on the computer screen looked to be within spec.

Yeah, looking at that pic I'd say you're "dog walking" down the road. Have someone ride behind you and you'll be able to tell.