For installations of 1999-2006, mechanical throttle body, Gen III (4.8L, 5.3L, 6.0L) engines using ECMs with service #12200411 or #9354896. Engine codes supported are LR4, LM7, LM4, LQ4, and LQ9. 2003-2006 engines require the factory installed throttle by wire throttle body to be changed to a cable throttle type. Harness includes all connections for fuel injection operation: ECM, TPS, IAC, CTS, IAT, MAF, MAP, Injectors**, Coils, CMP, CKP, Knock, VSS, ISS, 4L60E & 4L80E Transmissions, Front Bank 1 & 2 O2 Sensors. Emissions connections included in harness include a Secondary air pump, Secondary air solenoid, EGR, Canister vent and Canister purge. Harness incorporates its own 8 circuit fuse block with ignition relays and connection to factory style fuel pump relay. This standard length harness allows four feet from the back of the intake manifold to where the fuse block and ECM mount. Perfect for those that plan to mount these components under the dash or in the glove box.

This kit includes:

• All new fuel injection harness with OEM fitment connectors and harness breakouts
• OBDII connector, mounting bracket and check engine light
• Crimp-on terminals, rubber grommet
• Mounting hardware
• Installation manual