late model fans on a 2000 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Boog** · 01-28-2012, 07:32 AM

I have been wondering if it's much trouble converting the engine driven fan on the 2000 GMC to the later model dual electric fan setup from say an 06. The mounting part should be a snap. It's the wiring I'm more concerned about. Obviously it won't be a plug n play deal. I know I could buy an aftermarket controller to run them but I'd really like it to wire up and work like the factory setup. A clean factory installed look.
Does the computer control the fan cycling or is it just controlled by the temp sensor?
Have any of you done this?

**Boog** · 01-28-2012, 09:00 AM

Well after some reading I see the later efan trucks have a 34" wide radiator. I guess I'll have to do some measuring.
My interest in the swap was sparked when we bought the 06 crew. The thing is quiet and the engine seems to warm up quicker than my 2000. I like that.

clinebarger · 01-28-2012, 07:11 PM

The ECM controls the fans, You can have the feature turned "on" in you ECM with a custom tune. Add some wires & relays.

droppedgmc · 01-31-2012, 02:30 PM

I went to the wrecking yard and picked up a set of LS1 fans. I've been running them since 2004 with no issues. wired in with 1 relay per fan. they are always on and work well. No need for the 34". These with a 160° thermostat, I never get above 170°

6772owner · 02-02-2012, 09:44 PM

Nelson Perfomance sells a harness to allow you to use GM factory (LS1 or truck fans) or aftermarket fans and control them from the PCM. As stated above you have to the feature turned on in the PCm, but then the fans will operate correctly with temp and A/C. The fans running all the time defeats the purpose of having e-fans in my opinion, you are not getting the faster warm ups and they are dragging down the alternator/batt all the time... just my .02

**Boog** · 02-02-2012, 11:04 PM

I agree. The fans do not need to run all the time and these engines are tuned to operate best @195*. This ready made harness is what I'm talking about. Would Nelson Performance.com get me there?

6772owner · 02-02-2012, 11:13 PM

Yup, heres a link to what ive been looking at, hoping to do GM e-fans at some point...

http://www.nelsonperformance.com/HarnessInstall.htm
Posted via Mobile Device

01-28-2012, 07:32 AM	#1
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,191	late model fans on a 2000 I have been wondering if it's much trouble converting the engine driven fan on the 2000 GMC to the later model dual electric fan setup from say an 06. The mounting part should be a snap. It's the wiring I'm more concerned about. Obviously it won't be a plug n play deal. I know I could buy an aftermarket controller to run them but I'd really like it to wire up and work like the factory setup. A clean factory installed look. Does the computer control the fan cycling or is it just controlled by the temp sensor? Have any of you done this? __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

01-28-2012, 09:00 AM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,191	Re: late model fans on a 2000 Well after some reading I see the later efan trucks have a 34" wide radiator. I guess I'll have to do some measuring. My interest in the swap was sparked when we bought the 06 crew. The thing is quiet and the engine seems to warm up quicker than my 2000. I like that. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

01-28-2012, 07:11 PM	#3
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: late model fans on a 2000 The ECM controls the fans, You can have the feature turned "on" in you ECM with a custom tune. Add some wires & relays.

01-31-2012, 02:30 PM	#4
droppedgmc Truck Enthusiast Join Date: Dec 2006 Location: Arlington, WA Posts: 1,346	Re: late model fans on a 2000 I went to the wrecking yard and picked up a set of LS1 fans. I've been running them since 2004 with no issues. wired in with 1 relay per fan. they are always on and work well. No need for the 34". These with a 160° thermostat, I never get above 170° __________________ '85 swb

02-02-2012, 09:44 PM	#5
6772owner Gearhead Join Date: Jan 2008 Location: Colorado Posts: 1,193	Re: late model fans on a 2000 Nelson Perfomance sells a harness to allow you to use GM factory (LS1 or truck fans) or aftermarket fans and control them from the PCM. As stated above you have to the feature turned on in the PCm, but then the fans will operate correctly with temp and A/C. The fans running all the time defeats the purpose of having e-fans in my opinion, you are not getting the faster warm ups and they are dragging down the alternator/batt all the time... just my .02 __________________ 2002 Saturn SL2, My D/D 2019 Ford Fusion SE, Ecoboost - Wife's D/D 1993 Camaro Z28, A4, CAI, Cat-Back Exhaust Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD! Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644

02-02-2012, 11:04 PM	#6
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,191	Re: late model fans on a 2000 I agree. The fans do not need to run all the time and these engines are tuned to operate best @195*. This ready made harness is what I'm talking about. Would Nelson Performance.com get me there? __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

02-02-2012, 11:13 PM	#7
6772owner Gearhead Join Date: Jan 2008 Location: Colorado Posts: 1,193	Re: late model fans on a 2000 Yup, heres a link to what ive been looking at, hoping to do GM e-fans at some point... http://www.nelsonperformance.com/HarnessInstall.htm Posted via Mobile Device __________________ 2002 Saturn SL2, My D/D 2019 Ford Fusion SE, Ecoboost - Wife's D/D 1993 Camaro Z28, A4, CAI, Cat-Back Exhaust Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD! Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644



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