Hayes Quik Connect OEM Wiring Harness For Cadillac/Chevy/Gmc/Hummer. No splicing is required The 81780-HBC Quik-Connect OEM Wiring Harness is compatible with select Cadillac Chevrolet GMC and Hummer vehicle models. This OEM Wiring Harness is compatible with select 2002 - 2006 Cadillac Escalade EXT/ESV models. Compatible with select 2003 - 2007 Chevrolet: Avalanche 1500/2500 Silverado 1500/2500/3500 Silverado Classic Only Suburban and Tahoe models. Compatible with select 2003 - 2007 GMC: Sierra Sierra Classic Only Yukon Yukon Denali Yukon XL and Yukon XL Denali models. Compatible with select 2003 - 2007 Hummer: H2 and H2SUT models. These vehicle models feature a BP1 position for installation. The BP1 position for installation can be found under or behind the dash to the left or right of the emergency brake pedal. Features of Hayes 81780HBC Quik Connect OEM Wiring Harness For Cadillac/Chevy/Gmc/Hummer Installations are fast and easy just simply snap together No splicing is required Compatible with select Cadillac Chevrolet GMC and Hummer vehicle models See long description for full list of compatible vehicle models Package Contents: Hayes 81780HBC Quik Connect OEM Wiring Harness For Cadillac/Chevy/Gmc/Hummer Hayes 81780HBC: Quik Connect OEM Wiring Harness For Cadillac/Chevy/Gmc/Hummer