This all sounds like BS. If it's not BS you're a dumbass for not taking it to a Hummer dealer for the warranty work, regardless of how bad traffic is or how far away it is.
First, you crank a vehicle. You don't "turn it on." You would drive it, not ride it. The engine dies not "turns off."
Then there all of the inconsistencies with the dealers among numerous others that are too many to list.
3 out of 10