Sierra 3500 Denali 4WD V8-6.0L (2011)
3. Connect a 3 A fused jumper wire between the MIL control circuit terminal listed below and ground. The MIL should illuminate.
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ECM terminal X1-52 for RPO L96
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ECM terminal X1-68 for all other RPOs
‹› If the MIL illuminates, replace the ECM.
‹› If the MIL does not illuminate, test the appropriate MIL control circuit for a short to voltage, or an open/high resistance. If the MIL control
circuit tests OK, test the instrument panel cluster ignition circuit for a short to ground or open/high resistance. If the circuit tests normal,
replace the instrument panel cluster/bulb.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble
Code Tests and Associated Procedures/Verification Tests and Procedures) after completing the diagnostic procedure.
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Instrument Cluster Replacement (Without RPO SLT) (See: Instrument Cluster / Carrier/Service and Repair/Instrument Cluster Replacement
(Without RPO SLT))Instrument Cluster Replacement (With RPO SLT) (See: Instrument Cluster / Carrier/Service and Repair/Instrument Cluster
Replacement (With RPO SLT))
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Control Module References (See: Testing and Inspection/Programming and Relearning/Control Module References) for ECM replacement,
setup, and programming
