Written by Joel Paynton Tuesday, 10 November 2009 13:54
Last issue, Joel Paynton wrote about aftermarket power modifications on the Duramax diesel and their potential affects on your GM warranty. Shortly after, on August 4, 2009, GM posted Bulletin #08-06-04-006D which contained this statement:
Important: In order to process ANY driveability/engine/transmission/drivetrain WARRANTY CLAIM, you MUST photograph the required Tech 2® screen information BEFORE servicing or removing any engine/transmission/drivetrain components from the vehicle.
This had broad implications, requiring a technician to do all the groundwork to ensure there is no power program in the truck before doing any powertrain warranty work. It could be interpreted to mean that even minor and completely unrelated powertrain issues, for example, leaky seals, an electrical failure, a failed sensor and so on, would obligate the technician to investigate and document if there is a power program in the ECM. GM seemed to be launching an all-out campaign to find and stamp out anyone running aftermarket calibrations in their ECM.