For installations of 2003-2006, throttle by wire, Gen III 4.8/5.3/6.0L engines (with a 4L60E, 4L65E, 4L70E, 4L80E, 4L85E, or manual transmission) using V8 ECMs with Green and Blue TPAs. Engine codes supported are LR4, LM7, LM4, LQ4, and LQ9. The harness includes all connections for fuel injection operation: ECM, TAC module, Accelerator Pedal, IAC, CTS, IAT, MAF, MAP, Injectors (Non-flex and flex-fuel connector pigtails included in kit), Fuel Composition Sensor, Coils, CMP, CKP, Knock, VSS, ISS, 4L60E & 4L80E Transmissions, Front Bank 1 & 2 O2 Sensors. The harness does not include any emission device connections. The harness incorporates its own 10-circuit/4-relay weather-proof fuse block.