Programming an Existing or New Control Module

WARNING: This page is about a different car, the 2021 GMC Sierra 3500 HD and 2021 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

To program an existing or new control module, perform the following procedure:

NOTE:

High underhood temperatures may prevent programming of the control module. Allow sufficient time for the engine to cool before proceeding.

Ignition - On / Vehicle - In Service Mode
Access SPS and follow the on-screen instructions for the control module: K34 Glow Plug Control Module