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How To: '99-'04 GMT800 OEM E-fan upgrade

Discussion in 'Tech How To' started by ScottyBoy, Jun 19, 2011.

  1. Black02Silverado

    Black02Silverado Sponsor

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    I would thing that putting that much of a draw on that little amp alternator, that it will not last to long, probably getting super hot trying to keep up.
     
  2. 5.3silverado

    5.3silverado I'm too LAZY to Choose a Custom Title!!!

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    I am wanting to do this efan swap and looking for radiator I found different thickness which one do I need and do I reuse my original radiator hoses?

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  3. Faxcion

    Faxcion Diesel Killer

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    So that wiring job kicks on the fans automatically still or do you have a switch?
     
  4. 5.3silverado

    5.3silverado I'm too LAZY to Choose a Custom Title!!!

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    Fan will turn on with a/c and when the pcm detects coolant temp high both fans will turn on.

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  5. 5.3silverado

    5.3silverado I'm too LAZY to Choose a Custom Title!!!

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    I got electric fan unit bought $100 and I am gonna buy new radiator $155 and I found a 145 amp alternator. The last thing looking for is wire harness.

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  6. daddy

    daddy Administrator

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    You have to have it programmed as well. :BBP: can do that and they sell harnesses as well, if desired.
     
  7. ScottyBoy

    ScottyBoy No, that's not a banana in my pants.

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    If you got the fan plugs/pigtails with your fan, then you can make your own harness using the wiring diagram I posted in the beginning of the thread. I would use 40 amp relays and 10 gauge wiring.
     
  8. 5.3silverado

    5.3silverado I'm too LAZY to Choose a Custom Title!!!

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    I have access to a tech 2 scan tool can I turn on e-fan opt with that?

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  9. Faxcion

    Faxcion Diesel Killer

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    Cool thanks :thumbs:
     
  10. ScottyBoy

    ScottyBoy No, that's not a banana in my pants.

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    Not sure. I know you can do it if you have EFI-Live.
     

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