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 MANUALSCHEVROLET2009TAHOE 2WD V8-6.0L HYBRIDREPAIR AND DIAGNOSISTESTING AND INSPECTIONPROGRAMMING AND RELEARNINGENGINE CONTROL MODULE PROGRAMMING AND SETUP
2009 Chevrolet Tahoe 2WD V8-6.0L Hybrid
Engine Control Module Programming and Setup
2009 Chevrolet Tahoe 2WD V8-6.0L HybridSECTION Engine Control Module Programming and Setup
Engine Control Module Programming and Setup
The following service procedures require either a programming or a setup event performed for a complete repair.
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) (Programming and Relearning).
* The CKP Variation Learn-Refer to Crankshaft Position System Variation Learn (Service and Repair).
* The Theft Deterrent Programming-Refer to Theft Deterrent Control Module Programming and Setup (Programming and Relearning).
* 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.
ECM Reprogramming
Important: DO NOT reprogram a FlexFuel (E85) vehicle while the fuel composition learn function is active. If necessary, drive the vehicle until the scan tool indicates that the fuel composition learn parameter is inactive. Programming with the fuel composition learn active will result in fuel trim DTCs.
* If the ECM needs to be reprogrammed, refer to Service Programming System (SPS) (Programming and Relearning).
* 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 reprogrammed.
* 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 reprogrammed.
Setup for Component Replacement
The replacement of some components will require a setup procedure for complete repair.
If any of the following components are replaced, a CKP Variation Learn Procedure must be performed. Refer to Crankshaft Position System Variation Learn (Service and Repair).
* Engine replacement
* Any engine repair that disturbs the crankshaft position (CKP) sensor or its relationship with the crankshaft reluctor wheel
* CKP sensor
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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.