JEGS 555-10412 GM LS Engine Swap Wiring Harness Features:

• New GM-style fuel injector harness designed to work with OE EV1-style connectors
• OE Style OBDII connector and mounting bracket
• Compatible with all OE GM sensors
• Includes fuse block

Requirements:

• All Vortec engines require VATS (Vehicle Anti-Theft System) to be removed from the PCM. If VATS is not removed from the PCM, the engine will NOT start. A PCM such as 764-60717 can be used.
• Vortec engine harness utilizes two oxygen sensors on each side of the engine, one before and after the catalytic converter. The rear 02 sensors (after the catalytic converter) are NOT used.
• All Vortec engines utilize an EGR, Air Pump, and CCP features for emission control. This harness does not include provisions for EGR, Air Pump, and CCP (not necessary for engine operation). PCM programming may be necessary to avoid storing Diagnostic Trouble Codes (DTC) for the absence of emission equipment.
• It is recommended that you use a VSS when using a T56 or non-electric transmission (TH350, TH400, Powerglide, 700R4, etc.). Failure to use VSS can result in an unexpected stalling during hard braking or an inoperable throttle body.
• A two-position brake switch is also recommended when using drive-by-cable throttle bodies. The brake switch should be closed (not electronically connected) when brakes are not being applied and open (not electronically connected) when brakes are being applied. This is the opposite of a standard brake switch.

JEGS 555-10412 GM LS Engine Swap Wiring Harness Included Connectors:

• Fuse/Relay Box
• Fuel Pump Control
• Fan Controls
• Check Engine Light, Speedometer, Tachometer, OBD2
• IAC and TPS
• MAF Sensor
• MAP Sensor
• Engine Coolant Temp Sensor
• Alternator Control
• (2) Upstream Oxygen Sensors
• Crankshaft Position
• Camshaft Position
• Fuel Injectors
• Knock Sensors

JEGS 555-10412 GM LS Stand Alone Wiring Harness Notes:

• GM LS1 and LS6 main engine harness. For applications with 24x crank sensors.