For installations of a throttle by wire LS1 / LS6 engine with a 4L60E or T-56 transmission using ECMs with service #12200411. These engine and transmissions were factory equipped in 1997-2004 Chevrolet Corvette 5.7L. Harness includes all connections for fuel injection operation: ECM, TPS, CTS, IAT, MAF, MAP, Injectors, Coils, CMP, CKP, Knock, VSS, 4L60E Transmission, Front Bank 1 & 2 O2 Sensors, TAC module, TAC motor and Accelerator pedal position sensor. Harness does not include any emissions related connections. Harness incorporates its own 8 circuit fuseblock with ignition relays and connection to factory style fuel pump relay.