This LS 1 engine harness is a simple, stand alone EFI engine harness designed for the mass air fuel injection system found in 1999-2004 Corvettes. It comes complete with factory connectors, terminals, color coding OBD II connector, check engine light and plugs directly into the factory computer. This harness allows you to run the harness in the central tunnel so that the computer can get mounted in the cockpit behind the dash.

Applications
· Any car using a GM LS 1 engine with electronic throttle cable and mass air EFI system.

Technical Notes
· If using a new computer then the computer must also get programmed by the dealer with a 99-04 Corvette manual transmission program.
· The computer must still get sent to Factory Five to get flashed.
· This is a Mass Air harness like the factory Corvette harness not a speed density harness.
· This harness requires all of the stock Corvette sensors, relays and a 99-04 Corvette computer.

Below are part numbers if buying them all new.
Main Computer…… Service - #12200411 (Must also get programmed by the dealer with a 99-04 Corvette manual transmission program)
Fuel Pump Relay……………… - Delco # 15-8240
Brake Switch………………… - Delco# D850A
Gear Indicator Switch - ……Delco# D2286A MAF/IAT
Sensor - Delco# 213-364 GM# 25318411
Engine Coolant Temperature… - …Delco# 213-953 GM# 15326388
Oxygen Sensor (Pass & Driver Side) - Delco# AFS75 GM# 25312184
MAP Sensor……… - Delco# 213-331 GM# 16212460
Oil Pressure…… - …………………GM# 12573107
Knock Sensors - Delco# 213-362 GM #10456603
Coils - GM #12558948 Delco# D580
Cam Position Sensor - GM #12561211 Delco# 213-363
Crankshaft Position Sensor - ………GM #12560228 Delco# 213-354
Throttle Body - GM# 17113669
TAC Module - GM# 12578953
Accelerator Pedal - GM# 12565643

Note: Because the GTM intake is rotated 180 degrees, installation into the GTM will require rerouting of some wires. Follow instructions in the GTM assembly manual for installation of this harness in the GTM.