For Reference only! ASTRO 04 Elec Cont Unit (ECU); (LH Fr by battery) AVALANCHE 2500 04 Elec Cont Unit (ECU); (LH Fr under battery) BLAZER S10/JIMMY S15 04 Elec Cont Unit (ECU); (RH Fr eng comp) CHEVROLET VAN 04 Elec Cont Unit (ECU); (LH Rr eng comp) CORVETTE 04 Elec Cont Unit (ECU); (RH eng comp), ID 12586243 CTS 04-05 Elec Cont Unit (ECU); (RH eng comp), V series, ID 12586243 ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKB ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKY ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFPZ ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFYY ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YHRA ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKB ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKY ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFPZ ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFYY ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YHRA GMC VAN 04 Elec Cont Unit (ECU); (LH Rr eng comp) GTO 04 Elec Cont Unit (ECU); main (LH eng) RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKB RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKY RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFPZ RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFYY RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YHRA S10/S15/SONOMA 04 Elec Cont Unit (ECU); (RH Fr eng comp) SAFARI (GMC) 04 Elec Cont Unit (ECU); (LH Fr by battery) SIERRA 1500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), w/o hybrid; w/4.3L SIERRA 2500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 8.1L SIERRA 3500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 8.1L SILVERADO 1500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), w/o hybrid; w/4.3L SILVERADO 2500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 8.1L SILVERADO 3500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 8.1L SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFKB SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFKY SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFPZ SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFYY SSR 04 Elec Cont Unit (ECU); (next to air box), ID YHRA SUBURBAN 2500 04 Elec Cont Unit (ECU); (LH Fr under battery), 8.1L TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKB TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKY TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFPZ TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFYY TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YHRA YUKON XL 2500 04 Elec Cont Unit (ECU); (LH Fr under battery), 8.1L Please make sure to match the Part Number of the item with the one you have. All Modules have to be reprogrammed/repaired. We do not provide reprogramming/repair service. We are also not responsible for any kind of labor cost or reprogramming cost. In case of a return, Buyer will only be covered for the item price. This ECM is a core, recommended to be repaired/re-manufactured before installation. ECM appears to be in good condition but has not been tested. Please review all photos and the part number as this is the exact unit you will receive. Powered by SixBit's eCommerce Solution