Electric Fans & Radiator Size?

[Dan Acosta]

I have an 03 Yukon 2500. I want to upgrade to electric fans. I have heard there are larger radiators on some models. How do I know if I have the larger one or not? Also, Do they make electric fans for both sizes?

 

[MCAT069]

Do you have the 6.0 or 8.1L?

 

[Dan Acosta]

I have the 6.0

 

[Doubeleive]

34" wide is usually the larger one, thickness can vary also depending on how much money you want to spend, mine is 1 3/8" from 1800radiator

 

[MCAT069]

The 8.1L is the one with the giant ass super expensive to replace radiator as I personally found out last summer. TYC 622210, Dorman 620-653 are the numbers to fans that will work for you among others. Are you going to run a stand alone controller for the fans or install the factory harness and have it tuned?

 

[Dan Acosta]

The 8.1L is the one with the giant ass super expensive to replace radiator as I personally found out last summer. TYC 622210, Dorman 620-653 are the numbers to fans that will work for you among others. Are you going to run a stand alone controller for the fans or install the factory harness and have it tuned?

Those are the part numbers for the "std" radiator, not the big one right? I am planning on getting a harness from Nelson Tuning unless I can find one locally. I want to have it tuned to run from the ecm.

 

[MCAT069]

Those are the part numbers for the std 34 inch(?) radiator found with the 5.3/6.0. You should get the factory harness that @ScottyBoy sells if he has any available. There are two wires, a blue one and a green one, that plug into the ECM. I don't remember which wire goes to #42 and which one goes to #33.

 

[ScottyBoy]

Those are the part numbers for the std 34 inch(?) radiator found with the 5.3/6.0. You should get the factory harness that @ScottyBoy sells if he has any available. There are two wires, a blue one and a green one, that plug into the ECM. I don't remember which wire goes to #42 and which one goes to #33.

View attachment 204707

Green trigger wire goes to pin 42 in the blue plug, and the blue wire goes to pin 33 on the green plug. And yes, I have an OEM harness in stock right now. It's $125 shipped.

 

[MCAT069]

Thanks for clarifying which trigger wire goes where.

 

[k0u812]

Green trigger wire goes to pin 42 in the blue plug, and the blue wire goes to pin 33 on the green plug. And yes, I have an OEM harness in stock right now. It's $125 shipped.

I'm looking for a harness for my 02' Tahoe if you have any right now @ScottyBoy.