Dual Electric Fan Replacement

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Doubeleive

Wes
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Factory fans wired to a FACTORY harness (like the ones I've sold to several members on here) are normally wired as follows: One fan run at high speed when the AC is on. The second fan comes on high. when the temp threshold is reached and the temp wire is triggered. So when the engine is at operating temp AND the AC is on, both fans will be running at high speed. If the AC is OFF and the engine reaches operating temperature, both fans come on at low speed. But it could be set up completely different if it's custom wired, or if it has an after harness or fan controller. Some aftermarket fan controllers don't connect to the ECM or the AC compressor trigger wire, they just have a temp probe that gets mounted to the radiator or a coolant hose or something.
maybe it's different on the nbs but on the nnbs there is only 1 relay for high and 1 relay for low, no left/right
 

OR VietVet

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You know I replace things on my rig just for giggles. I have looked high and low for a new in stock complete electric fan assembly for my Z71 and cannot find anything except Dorman or other aftermarket crap. I can get motors and blades all day long but the whole assembly? I cannot find one. If it was available anywhere, I would buy it. @915_Tahoe, can you help a guy out? 89023365 is the OE number, right?
 

Doubeleive

Wes
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You know I replace things on my rig just for giggles. I have looked high and low for a new in stock complete electric fan assembly for my Z71 and cannot find anything except Dorman or other aftermarket crap. I can get motors and blades all day long but the whole assembly? I cannot find one. If it was available anywhere, I would buy it. @915_Tahoe, can you help a guy out? 89023365 is the OE number, right?
the price for a whole new shroud, motors and fans as a set is crazy high, you only need to replace the motor/s unless the plastic is cracked
 

OR VietVet

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the price for a whole new shroud, motors and fans as a set is crazy high, you only need to replace the motor/s unless the plastic is cracked
I know and agree @Doubeleive, but you know me, I like shiny new things on my rig. It has a new radiator and whatever bolts to it must be shiny too. Plus, it is easier to swap out that way and I have a friend with a 2005 Tahoe that buys all my old reusable parts.
 

Doubeleive

Wes
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I know and agree @Doubeleive, but you know me, I like shiny new things on my rig. It has a new radiator and whatever bolts to it must be shiny too. Plus, it is easier to swap out that way and I have a friend with a 2005 Tahoe that buys all my old reusable parts.
you can find all the parts new individually
 

OR VietVet

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you can find all the parts new individually
I did look again and found Genuine GM motors and both blades but no shroud. RA says is out of stock and will notify me and Genuine GM Parts and GM Parts Direct both show discontinued. Did you find the shroud somewhere else?
 

mattbta

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They are activated differently on 00-02 trucks vs 03-06. Can't comment on the operation for certain but I seem to recall on 03-06 both are on for low and then high.
 

Doubeleive

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They are activated differently on 00-02 trucks vs 03-06. Can't comment on the operation for certain but I seem to recall on 03-06 both are on for low and then high.
00-03 do not come with fans unless someone retro fits them on from a 04+, and some 04's may not have fans either the last 04 suburban we had did not have electric fans
 

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