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  1. OEM Issues
    I am new to the group so first I would like to say hello to everyone. I just got back from hooking up my 2004 GMC Envoy XL to the computer reader at Checker. I got a few codes and I think I may know what they are but I thought I would post them here to be sure. I am making a trip from Colorado...
  2. General
    I am new to the group so first I would like to say hello to everyone. I just got back from hooking up my 2004 GMC Envoy XL 6CYL to the computer reader at Checker. I got a few codes and I think I may know what they are but I thought I would post them here to be sure. I am making a trip from...
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