Workshop Repair and Service Manuals GMC SIERRA
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K20 Engine Control Module Programming and Setup (LGH or LML) Engine Control Engine Control Module

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The following service procedures require either a programming or a setup event performedfor a complete repair.

ECM Replacement

If the engine control module (ECM) is replaced, the following procedures must be performed:

Note:Clear any DTCs that may have set after completing the programming procedure.

Enable ECM Reprogramming—Refer toService Programming System (SPS).Perform the CKP Variation Learn—Refer toCrankshaft Position Reluctor Wheel Learn.Perform a Theft Deterrent Module Programming and Setup—Refer toTheft Deterrent Module Programming and Setup.Brake Pedal Position Sensor Learn—Refer toBrake Pedal Position Sensor Learn.Perform a Fuel Injector Flow Rate Programming – Refer toFuel Injector Flow Rate ProgrammingPerform a Diesel Particulate Filter (DPF) Service Regeneration Enable—Refer toDiesel Particulate Filter (DPF) Regeneration Enable.If over 14k GVW, program the engine serial number with the scan tool.ECM Reprogramming

Note:Clear any DTCs that may have set after completing the programming procedure.

Enable ECM Reprogramming—Refer toService Programming System (SPS).

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