60714 - 1999-2006 GM Gen III 4.8/5.3/6.0L EFI Harness - Mech TB (60217 w/ VATS Removed ECM)
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This harness is designed for the 1999-2006 4.8L, 5.3L, 6.0L mechanical throttle body engines using an LS1 / LS6 PCM with a 4L60E, 4L65E, 4L70E, 4L80E, 4L85E, or manual transmission. 2003-2006 Engines will require a mechanical throttle body to be installed. 2003-2006 engines which were originally flex fuel will also require Delphi Multec 2 (factory truck style) injectors to be installed. Harnesses do not include connections for the rear O2 sensors or fuel tank pressure sensor but are available separate. Included with this kit is an 0411 ECM PN 60712. This ECM has the VATS removed and is loaded with a base truck tune. Further tuning will be required by a local tuner.