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 MANUALSCHEVROLET2011SILVERADO 1500 4WD V8-6.2LREPAIR AND DIAGNOSISDIAGRAMSCONNECTOR VIEWSENGINE CONTROL MODULEENGINE CONTROL MODULE (ECM) X2
2011 Chevrolet Silverado 1500 4WD V8-6.2L
Engine Control Module (ECM) X2
2011 Chevrolet Silverado 1500 4WD V8-6.2LSECTION Engine Control Module (ECM) X2
ENGINE CONTROL MODULE (ECM) X2
(RPO L20 or L9H with Y91)
Engine Control Module (ECM) X2
(LMG, LC9 or L9H without Y91)
RPO Codes
RPO L20, VIN A - Engine Gas, 8 Cylinder, 4.8L SFI, E85 MAX, Iron, GM
RPO LMG, VIN 0 - Engine Flexible Fuel (Gas/Alcohol), 8 Cylinder, 5.3L, SFI, V8, OHV, CYL Deactivation, Iron, GM
RPO LC9, VIN 3 - Engine Flexible Fuel (Gas/Alcohol), 8 Cylinder, 5.3L SFI, Aluminum, Cylinder Deactivation, GM
RPO L9H, VIN 2 - Engine Flexible Fuel (Gas/Alcohol), 8 Cylinder, 6.2L, SFI, Aluminum, GM
RPO Y91 - Merchandised Package, Luxury Edition
RENDER: 1.0x
NO RELATED
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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.