Electric Fans & Radiator Size?

Discussion in 'Engine & Drivetrain' started by Dan Acosta, Aug 5, 2018.

  1. Dan Acosta

    Dan Acosta Full Access Member

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    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?
     
  2. MCAT069

    MCAT069 Full Access Member

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    Do you have the 6.0 or 8.1L?
     
  3. Dan Acosta

    Dan Acosta Full Access Member

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    I have the 6.0
     
  4. Doubeleive

    Doubeleive Elite Member Supporting Member

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    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
     
  5. MCAT069

    MCAT069 Full Access Member

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    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?
     
  6. Dan Acosta

    Dan Acosta Full Access Member

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    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.
     
  7. MCAT069

    MCAT069 Full Access Member

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    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.

    IMG_20180805_1525036.jpg
     
  8. ScottyBoy

    ScottyBoy Full Access Member

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    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.
     
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  9. MCAT069

    MCAT069 Full Access Member

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    Thanks for clarifying which trigger wire goes where.
     

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