Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC2021SAVANA 2500 LS, 6.6L ENG VIN 7REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 38 (PROGRAMMING AND SETUP)REPAIR INSTRUCTIONSK34 GLOW PLUG CONTROL MODULE: PROGRAMMING AND SETUPPROGRAMMING AN EXISTING OR NEW CONTROL MODULE
2021 GMC Savana 2500 LS, 6.6L Eng VIN 7
Programming an Existing or New Control Module
2021 GMC Savana 2500 LS, 6.6L Eng VIN 7SECTION Programming an Existing or New Control Module
WARNING: This page is about a different car, the 2022 GMC Savana 3500, 2022 GMC Savana 2500, 2022 Chevrolet Express 3500, and 2022 Chevrolet Express 2500. 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
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.