This harness is designed to be a complete wiring harness for fuel injection system on GM 1999 and newer Vortec engines with Drive by Cable throttle body and T56 or non-electronic transmissions. Parts Included Complete Engine and Transmission Wiring Harness including all engine and transmission sensor connectors, ALDL Connector, 7 ATO Style Fuse Block, Fuel Pump Relay, Switched Power Ignition Relay, Cruise Control Wiring, Performance Shift Mode Wiring, MIL Light Wiring, P/N Wiring, TCC/Switch Wiring, Tach Wiring, Complete Detailed Instructions. Standalone Wiring Harness Fits LS LS1 Truck'99 -'06 VORTEC W/T56 DBC. Description These harnesses are designed for'99 -'06 VORTEC (w/LS1 Intake Manifold) retrofits into older muscle cars and street rods or newer non-emissions controlled vehicles. They are completely plug and play with switched power, constant power and ground connections required.Harnesses allow for installing the PCM underneath the dash of your vehicle with a sliding grommet seal for that professional leak proof look. Harnesses are professionally constructed from Brand New GM Delphi Connectors and TXL (Polyethylene Cross Linked) High Temperature Wire to GM Specifications. Note that harnesses are for non-emissions equipped vehicles and do not include air pump or EGR provisions. We are not responsible for undeliverable address. OR, you may choose to have a replacement. Your satisfaction is our priority. The item "Standalone Wiring Harness Fits LS LS1 Truck'99'06 VORTEC WithT56 DBC" is in sale since Wednesday, October 14, 2020. This item is in the category "eBay Motors\Parts & Accessories\In-Car Technology, GPS & Security\Terminals & Wiring\Wiring & Wiring Harnesses". The seller is "deepmo_64" and is located in Rancho Cucamonga, California. This item can be shipped to United States.