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 INSTRUCTIONSB218R SIDE OBJECT SENSOR MODULE - RIGHT: PROGRAMMING AND SETUPUNSUCCESSFUL PROGRAMMING RECOVERY
2021 GMC Savana 2500 LS, 6.6L Eng VIN 7
Unsuccessful Programming Recovery
2021 GMC Savana 2500 LS, 6.6L Eng VIN 7SECTION Unsuccessful Programming Recovery
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.
In the event of an interrupted or unsuccessful programming event, perform the following steps:
- DO NOT turn the ignition OFF. Ensure that all ECU, DLC and programming tool connections are secure and the TIS terminal operating software is up to date.
- Attempt to reprogram the ECU.
- If the ECU can still not be programmed, turn the ignition OFF for at least one minute.
- Turn the ignition ON and attempt to reprogram the ECU. The ECU should program.
- If the ECU still cannot be programmed, replace the ECU.
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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.