Note that the 10-speed and Allison-branded 10-speed automatics used in the Silverado HD and Sierra HD use a different valve body. Prior to the Gen 3 part, GM was running the Gen 1 valve body (part ...
A GM engineer who approved a change to faulty ignition switches in models that have now been recalled also appears to have signed off on not issuing a new number for that changed part, according to an ...
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