I'm assuming you already tried the manual mode mentioned in the manual? Maybe someone can give you some pics from the shop manual. The manual for my car keeps getting pushed back by Helm.
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Body shops are much cheaper on their rates than dealers.Buy a module /motor from a wrecking yard and take it to a body shop to have it installed. Most junk yards give a 90 day warranty on parts and body shop labor rates are cheaper than an auto repair shop. A body shop will also be able to get the hatch open
Welcome to the world of American corporations. Screwing the consumer at every turn! Plus, they offshore all their profits so they don't have to even pay taxes on them.Most GM dealers claim they work for the consumer, but really keep GM's best interests at heart. They will deny a problem until the warranty is up, then all of a sudden, yep, its broke, that will be double the rate of warranty pay!