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Review on πŸ”Œ Efficient GM Dual Electric Fan Upgrade Wiring Harness for Enhanced Cooling - 1999–2006 ECU Control Kit by Brody Jacobs

Revainrating 4 out of 5

Good price.

Fairly easy kit. Use silicone spray to push the pins through. Use a lot. Green goes to 42 on the blue ECM field. White rises to 33 on the ECM red box. I installed a relay on the side cover of the ECU. I have a 2001 Sierra, 99-2002, you may have a wire on number 33, although CAREFULLY push it. The HP tuner helps you turn on the fans. I would upgrade a 34" heatsink and fan. All pre 2012 fan headers are the same. The ground wire is too short and won't fit. Get the extra foot of wire you need.

Pros
  • In-Car Audio and Video Installation
Cons
  • Interchangeable