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.
The documentation procedure includes getting a photograph of the CVNs as listed by the Tech II scan tool, printing them out and stapling them to the hard copy of the work order. It also includes comparing all CVNs with the GM listing to determine if there is an aftermarket program in the ECM. GM also had to be informed by email whenever an aftermarket calibration was discovered. This whole process seemed like an extensive paper chase to endure for minor and typical repairs. It also takes time – who would pay the technician and the dealer to get this done with every Duramax that came into the shop? A good question. Even more confusing, several important steps referred to in the bulletin were completely missing. What prompted GM to attempt this kind of logistical nightmare – confusing to technicians and dealers, with the apparent idea to clamp down on any owners with power programs?
We can only speculate. Note this excerpt from my article:
Trackback(0) TrackBack URI for this entry
- Volume 3 Issue 3
- Volume 3 Issue 2
- Volume 3 Issue 1
- Volume 2 Issue 4
- Volume 2 Issue 3
- Volume 2 Issue 2
- Volume 2 Issue 1
- Volume 1 Issue 4
- Volume 1 Issue 3
- Volume 1 Issue 2
- Volume 1 Issue 1
Joel Paynton is an award-winning GM technician who specializes in Duramax fuel systems. He also does custom programming for any GM powertrain. Visit him on the web at www.payntonperformance.com.