Serial Data Gateway Module (SDGM) Reprogramming
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
When SDGM reprogramming must be performed, refer to Service Programming System (SPS) .
Ensure the following conditions exist in order to prepare for SDGM programming or reprogramming:
- The battery is fully charged.
- The ignition switch is in the RUN position.
- The Techline equipment cable connection at the data link connector (DLC) is secure.
Program the SDGM using the latest software matching the vehicle. Refer to up-to-date Techline equipment user instructions.
If the SDGM fails to program, proceed as follows:
- Ensure the DLC and SDGM connections are good.
- Inspect the Techline equipment for the latest software version.
- Attempt to program the SDGM. If the SDGM still cannot be programmed properly, replace the SDGM.