In 2004-2005 Chevrolet and GMC Duramax trucks, the glow plug controller is a common failure point, with a faulty module resulting in loss of power to the glow plugs, and code P0670 (glow plug control module circuit open). We rebuild these modules to function better than new by addressing the root cause of the failure. If you're in need of a rebuilt glow plug controller, you can find your exact part here: https://circuitboardmedics.com/glow-plug-controller/?_bc_fsnf=1&Service=Exchange If you have

5 Signs Of A Bad Or Failing Glow Plug