1998-2004 GM LS/1 LS6 EFI Harness

• LS Swap and Swap Wiring

• All new fuel injection harness with OEM fitment connectors and harness breakouts
• OBDII connector, mounting bracket and check engine light
• Rubber grommet
• Mounting hardware

This harness is standalone and is not intended to replace the OEM engine wiring.  Standalone harnesses are intended to run the designated engine & transmission only, generally when swapped into another vehicle.

• Engine: 5.7L LS1 / LS6 w/ Cable Throttle Body
• Trans.: 4L60E, 4L65E, 4L80E, T-56

Painless LS swap wiring harnesses make getting your engine swap wired a simple task!

This harness is designed for the 1998-2002 LS1 mechanical throttle body engines using a 1999+ LS1 / LS6 ECM with a 4L60E/4L65E/4L80E automatic or T56 manual transmission. These engines were found in 1998-2002 Camaro/Firebird. This harness will also work on 1997-2004 Throttle By Wire (TBW)  LS1/LS6 engines which has been changed to mechanical throttle body or any 1999-2006 (4.8, 5.3, & 6.2) Vortec truck engine which has been changed to a factory of aftermarket LS1 intake manifold, mechanical throttle body, and injectors. Harnesses do not include any emissions related connections but are available separate. Included with this harness is an 8 circuit modular fuse block and GM color coded wires with labels for easy installation.

This standard length harness allows four feet from the back of the intake manifold to where the fuseblock and ECM mount. Perfect for those that plan to mount these components under the dash or in the glove box.

Factory computers from 1999-02 Camaros or Firebirds, equipped with the LS1, may be used with this harness. These computers were service #9354896 or #12200411; the 60508/60509 will only work with one of these ECM part numbers that has been flashed with a V8 operating system. Some 12200411 ECMs were used in other applications

1998-2004 GM LS/1 LS6 EFI Harness/Engine: 5.7L LS1 / LS6 w/ Cable Throttle Body