Diagnostic Aids
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
A known good DVD disk is any original DVD, NOT a copy. An original DVD will give you the best results whereas a copied DVD can alter the voltage readings.