Holley HP EFI ECU and Harness Kits 550-606N 1Inventory Dedicated fuel and oil pressure

Dedicated fuel and oil pressure inputs

N/A or with power adders

2001-2006 GMC Yukon XL 1500 325 CID

Does NOT fit models equipped with Flex Fuel (E85)

2x Transmission Cooler Hoses

Holley HP EFI ECU and Harness Kits 550-606N 1Inventory Dedicated fuel and oil pressureHP ECU AND HARNESS, FORD MPFI, NTK Looking for a alternative for your stock or built late model factory FORD EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine