check engine light

yeah they can check GM!but most of the parts sellers don't know how to do it with the GM key.they have tons of them in the store put up,but most will give you one!

I need to get one of those magic thing from the Zone. I'm a tech for over 20 years and never seen a device that would tell me exactly what the problem is.... Why no one was telling me about this??? Zee

I have been a tech for over 50 years. if such a device was available i would be sitting in my easy chair hooking up cars and raking in the coins. and pushing the trip meter button does what? not going to happen at least not in the real world . ny friend you need more tin foil under your hat Hans