Holley EFI 558-455 - Transmission Control Harness

Holley EFI 558-455 - Transmission Control Harness

Holley EFI Transmission Control Harness - 2009+ GM 4L60

Transmission Control Harness;

Expanding on our Transmission Control options from Holley EFI. This new harness 558-455 from Holley EFI provides plug and play transmission control for the 2009+ GM 4L60 when used with a Dominator ECU. The 2009+ GM 4L60E contains an internal turbine speed sensor, which was not on the previous model year transmissions. Additionally, the valve body range selector is wired and controlled differently from the ECU.

• Plug and play fully terminated harness
• Compatible with Dominator, Terminator X Max and Sniper Transmission Controllers
• Connectors and unterminated wires for easy installation
• Built in Relay (Must be wired to a switched 12V source)