Painless Performance 60217 Standard Length EFI Harness for 1999-2006 GM Gen III 4.8, 5.3 & 6.0L w/Mechanical Throttle Body

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. 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 harness is a 10-circuit weatherproof 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 fuse block and ECM mount. Perfect for those that plan to mount these components under the dash or in the glove box. Includes: All new fuel injection harness with OEM fitment connectors and harness breakouts, OBDII connector, mounting bracket and check engine light, rubber grommet & mounting hardware. We recommend checking the online manual for the full list of required mating parts prior to ordering.

• Painless fuel injection wiring utilizes all new TXL wire, OEM fitment connectors and grouped harness breakouts making for an easy install and saving you from using old re-worked wiring; Machine crimped terminals match OE quality
• Every EFI harness is tested before leaving our facility, ensuring that each connector is properly pinned out and seated no chasing mis-pinned connections with Painless EFI wiring
• Diagnostic port and check engine light included with powder coated bracket, allowing you to check codes and troubleshoot just like a new OE vehicle
• When reliability and performance can't be compromised, you want TXL Wire - not the inexpensive primary wire you find in other harnesses; High strand count copper and high-quality insulation makes for high abrasion resistance and easy routing