Standalone Wiring Harness Fits 03-07 Hummer LS Vortec W/4L60E 4.8 5.3 6.0 Multec. These harnesses are designed for retrofitting'03 -'07 Vortec engines (4.8, 5.3, 6.0-Liter) and 4L60E or 4L80E transmissions into older muscle cars and street rods or newer non-emissions controlled vehicles. Harness allows use of the factory Vortec intake manifold and multec injectors with flex-fuel injectors (EV6) optional. Completely plug and play with four wire hookup (switched power, constant power and ground connections required). Harnesses are designed with a sliding grommet seal and 4 - 5 feet of length from the rear of the cylinder head to the PCM mounting position under the vehicle dashboard. A sliding grommet seal allows for professional, leak proof installation. Harnesses are professionally constructed from Brand New GM Delphi Connectors and TXL (Polyethylene Cross Linked) High Temperature Wire to GM Specifications. That harnesses are for non-emissions equipped vehicles and do not include air pump or EGR provisions. 1 x Complete Engine and Transmission Harness. 1 x English Instruction Manual. The item "Standalone Wiring Harness Fits 03-07 Hummer LS Vortec With4L60E 4.8 5.3 6.0 Multec" is in sale since Friday, January 8, 2021. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Air Intake & Fuel Delivery\Fuel Inject. The seller is "gothroughsuccess" and is located in Humble, Texas.