For Reference only:

Used, Good Condition, Match Part number; Please make sure to match part number before you buy, in order for its fitment n to work right it must be same part number !!! Plz also see pictures !!!  Expeditious Shipping !!! 30 days money back guarantee !!! May  Need Reprogramming !!! We are not liable for any labor cost !!! In case of any defect or damage we provide 30 days of money back guarantee and free return !!!

AVALANCHE 1500 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12586242
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKD
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKF
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKH
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKJ
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKX
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXL
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXM
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXN
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXP
ENVOY XL 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YHTN
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKD
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKF
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKH
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKJ
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKX
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXL
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXM
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXN
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXP
ENVOY XUV 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YHTN
ESCALADE 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12586242
ESCALADE ESV 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12586242
ESCALADE EXT 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12586242
HUMMER H2 04 Elec Cont Unit (ECU); (LH Fr under battery), SUT
ISUZU ASCENDER 04 Elec Cont Unit (ECU); (LH eng), 5.3L
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKD
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKF
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKH
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKJ
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKX
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXL
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXM
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXN
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXP
RAINIER 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YHTN
SIERRA 1500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), w/o hybrid; w/o 4.3L; ID 12586242
SIERRA 2500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L, ID 12586242
SIERRA 3500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L, ID 12586242
SIERRA DENALI 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12586242
SILVERADO 1500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), w/o hybrid; w/o 4.3L; ID 12586242
SILVERADO 2500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L, ID 12586242
SILVERADO 3500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L, ID 12586242
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFKD
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFKF
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFKH
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFKJ
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFKX
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFXL
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFXM
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFXN
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YFXP
SSR 04 Elec Cont Unit (ECU); (next to air box), ID YHTN
SUBURBAN 1500 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12586242
SUBURBAN 2500 04 Elec Cont Unit (ECU); (LH Fr under battery), 6.0L, ID 12586242
TAHOE 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12586242
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKD
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKF
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKH
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKJ
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFKX
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXL
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXM
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXN
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YFXP
TRAILBLAZER EXT 04 Elec Cont Unit (ECU); 5.3L (next to air box), ID YHTN
YUKON 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12586242
YUKON XL 1500 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12586242
YUKON XL 2500 04 Elec Cont Unit (ECU); (LH Fr under battery), 6.0L, ID 12586242
Please make sure item matches your car before you buy. All ECU/Engine computers/Airbag modules need to be reprogrammed in order to work properly. We are not responsible for labor costs.