Holley EFI Transmission Control Harness - GM 4L60 (Pre-2009) and 4L80 All particularly big cams that tend

particularly big cams that tend to reduce low-end power and torque

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

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

2020 GMC Sierra 3500 HD Denali Gas Crew Cab Pickup

Holley EFI Transmission Control Harness - GM 4L60 (Pre-2009) and 4L80 All particularly big cams that tendExpanding 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.