Mechanical fan clutch ID - The 1947 - Present Chevrolet & GMC Truck Message Board Network

LeesTruk · 09-22-2023, 08:30 AM

Thinking about going back to a mechanical cooling fan on my LS swapped '89 Cheyenne. Looking on Car-Part.Com, they list 4 different codes for the clutch; BF, DL, GDJ, and GFZ. Does anyone know what these codes signify? I'm not sure if they're RPO codes. Thanks

Joyridin · 09-22-2023, 12:21 PM

I went on Rockauto and punched in a 2003 Silverado as I wasn't sure what engine you have. They are listing quite a few variations. Reverse rotation, heavy duty heater, A/C etc.

https://www.rockauto.com/en/catalog/...an+clutch,6812

LS short box · 09-22-2023, 04:38 PM

I don't know the codes but I think only the trucks/vans had the mechanical fan. Should be tons of them in the salvage yard. I bet all were the same diameter.

**AussieinNC** · 09-23-2023, 05:18 PM

Those do not appear to be RPO codes....

Here is a link to a decent RPO decoder...

https://decoderpo.com/pages/G.html

72MARIO · 10-08-2023, 07:51 PM

I just went back to a clutch fan as well. I used a couple different clutches new from auto zone and carquest. One was a hayden. None of them came on or off at the correct temperature. The hayden stayed locked up fully with the ac on the other I think was a duralast it was still engaged at 184. I got one from a junk yard. Work perfectly. On in town in traffic off on the freeway.

09-22-2023, 08:30 AM	#1
LeesTruk Registered User Join Date: Mar 2015 Location: Manchester, CT Posts: 433	Mechanical fan clutch ID Thinking about going back to a mechanical cooling fan on my LS swapped '89 Cheyenne. Looking on Car-Part.Com, they list 4 different codes for the clutch; BF, DL, GDJ, and GFZ. Does anyone know what these codes signify? I'm not sure if they're RPO codes. Thanks

09-22-2023, 12:21 PM	#2
Joyridin Registered User Join Date: Sep 2020 Location: Cleveland, Ohio Posts: 558	Re: Mechanical fan clutch ID I went on Rockauto and punched in a 2003 Silverado as I wasn't sure what engine you have. They are listing quite a few variations. Reverse rotation, heavy duty heater, A/C etc. https://www.rockauto.com/en/catalog/...an+clutch,6812

09-22-2023, 04:38 PM	#3
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,136	Re: Mechanical fan clutch ID I don't know the codes but I think only the trucks/vans had the mechanical fan. Should be tons of them in the salvage yard. I bet all were the same diameter.

09-23-2023, 05:18 PM	#4
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,204	Re: Mechanical fan clutch ID Those do not appear to be RPO codes.... Here is a link to a decent RPO decoder... https://decoderpo.com/pages/G.html __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox

10-08-2023, 07:51 PM	#5
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Re: Mechanical fan clutch ID I just went back to a clutch fan as well. I used a couple different clutches new from auto zone and carquest. One was a hayden. None of them came on or off at the correct temperature. The hayden stayed locked up fully with the ac on the other I think was a duralast it was still engaged at 184. I got one from a junk yard. Work perfectly. On in town in traffic off on the freeway. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

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