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.
ECM Replacement
If the engine control module (ECM) is replaced, the following procedures must be performed:
- The ECM Reprogramming-Refer to Service Programming System (SPS) .
- The CKP Variation Learn-Refer to Crankshaft Position System Variation Learn , for the 4.8L, 5.3L, 6.0L or 6.2L and Crankshaft Position System Variation Learn for the 6.0L Hybrid.
- The Throttle/Idle Learn procedure-Refer to the following:
- Throttle/Idle Learn for the 4.8L, 5.3L, 6.0L or 6.2L
- Throttle/Idle Learn for the 6.0L Hybrid
- The Theft Deterrent Programming-Refer to Theft Deterrent Module Programming and Setup .
- The Fuel Composition Diagnostic, as necessary-Refer to Fuel Composition Diagnosis .
- Engine Oil Life Remaining-When available, use a scan tool to reset the Engine Oil Life Remaining back to the original percentage recorded before the module was replaced.
- Transmission Fluid Life Remaining-When available, use a scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was replaced.
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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.
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