SKU: HLY558-405
UPC: 090127667491
MPN: 558-405
The Trans Wire Harness GM 4L60 Pre 2009 - 4L80 from Holley is a vital electronic control solution designed for builders upgrading or retrofitting General Motors automatic transmissions. This harness is intended for use with pre-2009 wiring configurations, allowing for the integration of modern transmission systems into older vehicles.
Engineered to interface directly with Holley EFI systems and OEM-style engine controllers, this harness translates solenoid commands and sensor inputs with precision-matched pin configurations. It features shielded conductors that effectively reject electrical noise, ensuring reliable operation in high-vibration environments. The assembly also accounts for essential functions such as voltage regulation and transmission fluid temperature sensing.
This wire harness is ideal for fabricators, performance shops, and serious DIY enthusiasts working on LS conversions or EFI upgrades. It provides a streamlined solution for those tackling transmission swaps where factory wiring may no longer be applicable, ensuring a more straightforward installation process.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
