This is going to come as a shock to most of you, but there is something ELSE wrong with my '05 H2 with 34k miles.
The only vents that work are the defroster vents (ones that blow onto the bottom of the windshield).
None of the other vents work. Not sure if its related, but whenever I turn the car off, a groan comes from the dash like someone is punching a senior citizen...
Any suggestions as to what it could be?