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Watch the video to see how easy it is to install a Painless wiring harness.
PERFECT EMS GM 5.3L 1999 - 2006 Manual Throttle Body By Painless Performance
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Grab this 65108 and Click below for some more cool stuff to go with it.

PERFECT EMS GM 5.3L 1999 - 2006 Manual Throttle Body

This PERFECT®™ Engine Management System developed by Painless Performance®™ provides an opportunity for the avid car nut to upgrade their hot rod with a simple-to-install fuel injection system.  Benefits gained when a fuel injected engine is transplanted into a hotrod are:

  • Active fuel management
  • Fantastic cold starts
  • Better fuel efficiency
  • Reduced exhaust smell
  • Reduced engine noise
  • Longer service intervals
This PERFECT®™ Engine Management System consists of three key components:
  • A compact, waterproof 5.3L Gen3 engine control module, dyno-tested for maximum horsepower and then tuned for drivability by Painless Performance®™.  NOTE: Calibration to be used with GM 5.3L Gen3 engines from donor vehicles (1999-2006 Chevrolet/GMC full size pick-ups and SUVs).  This harness supports engines with Delphi Multec 2 injectors only.  Click here to identify what injector your engine currently has.  Absolutely no programming of the computer is required to run these stock engines - just plug-and-play. 
  • A brand new engine harness with all the OEM sensor connectors and circuits to make your engine run and look great while doing so.  Weatherproof fuseblock with built in fuel pump, ignition, electric cooling fan and an A/C circuit relay.  Fuel pump relay is controlled by the PERFECT Engine controller.  Ignition relay is used to power up the fuel injection harness.  Electric cooling fan relay will operated one electric cooling fan with an amperage rating of up to 40 AMPs.  A/C relay is used to tell the engine controller when the a/c compressor is commanded on by any factory or aftermarket a/c system.  With this harness your electric cooling fan will be activated according to preset engine temperature setting in the calibration and a/c compressor activation.

In the past customers have raised the question if this system will work with engine upgrades such as larger camshafts, aftermarket heads or headers?  The answer is absolutely yes.  Available for this PERFECT®™ System is the user friendly PERFECT Cal-Tool®™ part number 65245.   With this plug-n-play software and a laptop anyone can tune for almost all engine upgrades.  Purchase it separately or get it with your harness with part number 65253.