Holley EFI Transmission Control Harness - GM 4L60 (Pre-2009) and 4L80 All and a 12 percent thicker

and a 12 percent thicker core area with a major increase in volume

When the ExoFilter clogs during a CP4 pump failure it helps the truck give signs of an issue so you can shut off sooner

The included LED lights are backed by a 3-year warranty

2020 GMC Sierra 3500 HD Denali Gas Crew Cab Pickup

Holley EFI Transmission Control Harness - GM 4L60 (Pre-2009) and 4L80 All and a 12 percent thickerExpanding our transmission control options for our EFI systems, this harness provides plug and play for Pre 2009 GM 4L60 and 4L80 transmissions using a Dominator. This also contains a J4 connector to operate GM electronic transmissions.