This transmission control harness provides plug-and-play wiring for pre-2009 GM 4L60 and 4L80 transmissions when running a Holley Dominator EFI system, and includes a J4 connector for electronic transmission operation.
Specifications:
- Harness Application: GM
- Harness Type: Transmission
- Application: 1996-2008 GM 4L60 / 4L80
- Made for Dominator EFI
- Includes J4 connector for electronic transmission
- Fully terminated, plug-and-play harness with unterminated wires available for custom installation
- Product Type: Transmission Harness
- Part Number: 558-405
This harness is not compatible with 4WD installations.
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
What transmissions does this harness support?
It's built for pre-2009 GM 4L60 and 4L80 transmissions, covering 1996-2008 applications.
Which Holley EFI ECU does this harness pair with?
It's made for use with a Dominator EFI system.
Is this harness compatible with 4WD?
No, this harness is not compatible with 4WD installations.
Is this harness legal for street use?
No. This part is for Racing Use Only Vehicles and is not legal to install on an emissions-controlled street vehicle.
What part number is this harness?
This GM 4L60/4L80 transmission control harness is Holley part number 558-405.
