Electric fans | Chevy Silverado and GMC Sierra Forum

Apr 25, 2019 · Electric fans. Jump to Latest ... Chevy Silverado and GMC Sierra Forum. 1.4M posts 209K members Since 2009 A forum community dedicated to Chevrolet Silverado and …

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FAQs about Electric fans | Chevy Silverado and GMC Sierra Forum Coupon?

How do you wire a fan on a GM 05-06?

Here is a wiring diagram of how the fans are factory wired on the 05-06 GM trucks. If you have an 03-04 truck, then you will wire it exactly like this diagram shows. But on a 99-02, the PCM only has pin 42 available to use. The other trigger wire has to be connected to the AC compressor clutch relay wire. ...

Why is my engine fan not running at full speed?

When you first start up on a cool morning, the fan shouldn't be running at full speed when you run up the engine. If it is, the clutch has failed and you're going to be pouring a whole lot of power into the fan unnecessarily. So much power that it will definitely affect your fuel usage. ...

How do you hook up a fan on a 99-02 truck?

He claimed on 99-02 trucks there is only one pin available on the PCM to use for the fans. He said to hook the other one up to the AC wire. And there are no negative AC trigger wires, so I just used a relay on the compressor clutch wire. It works fine. Justin said that's exactly the same way he would have done it. ...

Do electric fans affect fuel usage?

So much power that it will definitely affect your fuel usage. There's no good reason to replace a properly functioning mechanical fan and clutch with electric fans. You'll never recover the cost. Electric fans aren't the panacea that everyone seems to think they are, anyway. ...

Should I replace a mechanical fan with an electric fan?

If it is, the clutch has failed and you're going to be pouring a whole lot of power into the fan unnecessarily. So much power that it will definitely affect your fuel usage. There's no good reason to replace a properly functioning mechanical fan and clutch with electric fans. You'll never recover the cost. ...

How do I connect a low speed fan trigger to a PCM?

And here is how your relay should look. Now take the green wire on your relay and splice it into the factory Green AC wire with solder and heat shrink tubing. I grounded the ground wire to this bolt on the fender, right below the fuse block. Now the low speed fan trigger needs to be connected to the PCM. ...