Reading H1 ODB codes
 

Dad has an H1 Alpha giving a check engine light. The dealership he bought in from in the Dallas area isn't GM anymore and will no longer service the truck. Can a GM dealership or general mechanic check the code on a Hummer? I'm hoping we can at least determine what the code is in Dallas. The truck has pretty low mileage and doesn't get driven a lot, it has no other symptoms beyond the light.

I have a shop near austin. I specialize in and only work on Hummer H1 and support hmmwv. I am also the closest Hummer specialist to you. Give me a call and i should be able to help over the phone about your code and if you need and service i would be happy to help. I have a few clients from near dallas.