⚡ Upgrade your ride’s cool factor with precision wiring!
The CULMKARI Dual Electric Fan Upgrade Wiring Harness (Part 7L5533A226T) is a direct-fit replacement designed for GM vehicles from 1999 to 2006 with ECU-controlled fans. It enhances cooling efficiency, prevents common wiring failures, and offers easy installation backed by expert customer support.
E**.
Wired incorrectly
I installed this wire harness with a dual fan setup on my 03 sierra. After getting the fans turned on by my tuner, yes they worked, but the fans came on and were on high speed constantly. Found the majority of the wires were wired wrong on the kit. Low speed never came on with original setup. Also the low speed fan(left fan) quit working all together. Now I have to purchase a new fan motor to fix the one fan.
V**M
Buy it
It DEFINITELY WORKS. Better than wiring up your own from the internet.. trust me!
T**Y
Under sized wire and relays.
The wire size is too small and the cheap relays are junk. The relays spade connectors overheated from poor electrical connections. Put better relays 40 amp then the connector spades at the fan connection melted on both fans. I ordered the GM OEM fan connectors and their a quality product. Don't waste your money on this harness. Either make you own with TE connectivity or Bosch relays and GM fan pig tails ( Part# 13580874) or get an OEM harness out of the salvage yard.
P**E
Simple to install and works perfect
Easy to install and was worth every penny. Did a E Fan swap on my 2000 silverado and boy did it free up hidden power a must do if you have a clutch fan
P**A
Good value for the price.
Pretty straight forward kit. Use silicon spray to help push through the pins. Use a lot. Green goes to 42 on the Blue ECM Panel. White goes to 33 on Red ECM panel. I mounted the relays on the side of the ECU cover. I have a 2001 Sierra, 99-2002 you might have a wire on number 33, GENTLY push it though. HP tuner is the go to on this to turn the fans on. I would do the 34 inch radiator upgrade and fans. All the fan plugs up to 2012 are the same. The ground wire is too short and will not fit. Get an extra foot of wire you WILL need it.
1**8
This harness is ok for the money if you are capable of modifying it to work properly.
Giving it 3 stars. Ordered this for my 2000 GMC Yukon SLT 5.3 that I did an Electric fan swap on. For the cost it's ok but required a lot of modifications to make it work. Most folks would be better off spending $150.00 for the Nelson harness.1) One ground wire is too short. I had to extend that wire.2) The white/green signal wires won't fit in the PCM harness due to how the pins were crimped. I had to repin those wires.3) Upon further inspection several of the contacts where the relays plug in were not fully seated and locked in the terminal s. So I had to fix 4 connections there.4) Becareful what advice you take on install. The White wire goes to Blue 42, The Green goes to Red 33. White wire is the signal wire that triggers activation based on coolant temp setting in PCM. The Green wire is the 12v trigger to run the fans when AC is on.This way gives you low/high speed dual fan operation just how GM sets them up. I set low speed to come in at 195 and high speed to come on at 210 degrees based around the factory thermostat temp.Hope this helps.
R**Z
Great LS swap harness
Works great. Good quality
F**R
Like this setup
I like how the relay packs are set up because all you have to have is a temperature grounding switch set to a certain temperature that you would like and you can literally put electric fans on just about anything with GM connectors which seem to be the most heavy duty out of most of the car industry
Trustpilot
1 week ago
1 month ago