cept saturn and hummer
LoL...that's messed up, they make them, they should work on them too.
Same company all GMCno, all GM.
right they are all owned by gm but saturn and hummer have to be purchased by the dealership to be serviced there. Im not sure why but i think its bc saturn wants to keep the customer service high and if youve ever been to a satern dealership vs a chevy or whatever they are alot nicer.... now im thinking hummer is just due to parts and stuff bc its such a off road vehicle (although not as much as the h1)