Mine's going on the 12th.... Same exact seat movement issues, as well as the leaking heater core issue. This morning, the locking differential "locked up" and remained locked up until i placed it back into reverse and then drive again. Only 1100 miles.
Cant wait to see the story the dealer gives me. Good thing im holding their survey hostage. If not, gonna document a service history and call the "lemon lawyer" thats right down the block.
If the GM Customer Service Rep reads this; it would be appreciated if you got in touch with me. I would like for you (customer service) to inform the dealer that this is a common issue so they do not just brush this off.