Conditions for Running the Procedure
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.
- Ignition = On
- Engine = Not Running
- K34 Glow Plug Control Module = -20 to 60°C (-4 to 140°F)