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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