This harness is standalone and is not intended to replace the OEM engine wiring.
Standalone harnesses are designed to run the designated engine & transmission only, generally when swapped into another vehicle.
This harness is 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.
A mechanical throttle body must be installed for 2003-2006 engines.
2003-2006 engines originally flex fuel will also require Delphi Multec 2 (factory truck style) injectors to be installed.
Connections for the rear O2 sensors or fuel tank pressure sensor are not included but are available separately.
Included with this harness is a 10-circuit weatherproof fuse block and GM color coded wires with labels for easy installation.
This extended length harness allows eight feet from the back of the intake manifold to where the fuse block and ECM mount.
Ideal for those planning to mount these components under the seat or in the center console.
Checking the online manual for the full list of required mating parts prior to ordering is recommended.
This harness does not support Flex Fuel USCAR Injectors.
