Accessory Power Module (APM) Reprogramming
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 GMC Sierra 3500 HD, 2013 GMC Sierra 2500 HD, 2013 GMC Sierra 1500, 2013 Chevrolet Silverado 3500 HD, and 2013 Chevrolet Silverado 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
When APM reprogramming must be performed, refer to Service Programming System (SPS) .
Ensure the following conditions exist in order to prepare for APM 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 APM using the latest software matching the vehicle. Refer to up-to-date Techline equipment user instructions.
If the APM fails to program, proceed as follows:
- Ensure the DLC and APM connections are good.
- Inspect the Techline equipment for the latest software version.
- Attempt to program the APM. If the APM still cannot be programmed properly, replace the APM.