Key won't turn the ignition over, the steering wheel is locked.

Hi this is Dusty, I'm one of the auto experts on RepairPal's Car Genius team! Sorry to hear about this, what a pain! If you haven't already, be sure to try and rotate the steering wheel both directions. If that doesn't help there could be a number of issues causing this bit of chaos, the good news is that GMC has a published diagnostic workflow to aide technicians in diagnosing this specific issue. If you have any other questions or would like to help with finding a RepairPal Certified shop in your area, give us a call! 877-913-1554