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2009+ GM 4L60E Transmission Control Harness 558-455

Transmission Harness


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(928) 706-6112


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.
  • Built in Relay - Must be wired to a switched 12v source.
  • Plug and play with 2009+ GM 4L60E Transmissions

Requires software version 5.0 build 100 or higher and ECU firmware 5.0 build 110 or higher



Shipping Information

  • Item Requires Shipping
  • W10.0000” x H2.0000” x L10.0000”

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