What is this for? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kevinr1970 · 03-18-2013, 03:00 AM

What is the oil filter for, it is located just under the front of the bed.
Doesn't look to be hooked up right now.

This is on a 1991 GMC 3500 crew-cab 2-wheel drive.
It had a camper on it when I bought it (that was removed before I bought it), and looks to have had a fifth-wheel hitch in the bed at one time.

piecesparts · 03-18-2013, 03:17 AM

Does this thing have a diesel engine in it? Maybe they used for a fuel filter.

kevinr1970 · 03-18-2013, 04:04 AM

No, it is a TBI 7.4 (454).
You know, it does have two batteries that I assumed had something to do with the camper, but maybe it was a diesel originally?
The 454 does have those "ribbed" valve covers that I think say Tonowanda(?) on them and I thought that was something from a later truck, so maybe it was swapped in?
I'll have to break down the option tag on the glove box in the next few days and see what it says...

andrewmp6 · 03-18-2013, 05:08 AM

Yeah it looks like a diesel fuel filter to me too.

ElGracho · 03-18-2013, 07:45 AM

It says fuel filter on it... I'm gonna say its a fuel filter....

Gordonr1973 · 03-18-2013, 11:12 AM

x3 Those lines to it look like rubber fuel limes as well.

Trace one back to see where it goes.

kevinr1970 · 03-18-2013, 02:56 PM

OK, it's a fuel filter, I guess I could have read that myself!
But my focus was on replacing the fuel filler hoses, and noticed that thing.

So is that a deisel thing or woould it have been used for gas?

The one line doesn't go anywhere, sort of loops around and is tucked in the frame.
The other one disappears behind the heatshield in front of it.

Hmmm...

willett · 03-18-2013, 04:35 PM

Maybe it had some kind of auxiliary motor in the box at some time like a water pump or a salter. Any weird holes in the box? Maybe somebody decided that they didn't like clamp-on inline filters???
Posted via Mobile Device

03-18-2013, 03:00 AM	#1
kevinr1970 Senior Member Join Date: Aug 2004 Location: Everett, WA Posts: 2,316	What is this for? What is the oil filter for, it is located just under the front of the bed. Doesn't look to be hooked up right now. This is on a 1991 GMC 3500 crew-cab 2-wheel drive. It had a camper on it when I bought it (that was removed before I bought it), and looks to have had a fifth-wheel hitch in the bed at one time. Attached Images __________________ 2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold)

03-18-2013, 03:17 AM	#2
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: What is this for? Does this thing have a diesel engine in it? Maybe they used for a fuel filter. __________________ Frank

03-18-2013, 04:04 AM	#3
kevinr1970 Senior Member Join Date: Aug 2004 Location: Everett, WA Posts: 2,316	Re: What is this for? No, it is a TBI 7.4 (454). You know, it does have two batteries that I assumed had something to do with the camper, but maybe it was a diesel originally? The 454 does have those "ribbed" valve covers that I think say Tonowanda(?) on them and I thought that was something from a later truck, so maybe it was swapped in? I'll have to break down the option tag on the glove box in the next few days and see what it says... __________________ 2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold)

03-18-2013, 05:08 AM	#4
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: What is this for? Yeah it looks like a diesel fuel filter to me too.

03-18-2013, 07:45 AM	#5
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,553	Re: What is this for? It says fuel filter on it... I'm gonna say its a fuel filter.... __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

03-18-2013, 11:12 AM	#6
Gordonr1973 Home Built '87 Join Date: May 2010 Location: Calgary, Alberta Canada Posts: 1,829	Re: What is this for? x3 Those lines to it look like rubber fuel limes as well. Trace one back to see where it goes. __________________ Gordon 1998 White Chev ext cab 2WD (Summer Project) http://67-72chevytrucks.com/vboard/s...d.php?t=408424 1987 Chev Silverado SWB (Winter Project Rebuild) http://67-72chevytrucks.com/vboard/s...d.php?t=424833 Truck Club http://67-72chevytrucks.com/vboard/s...d.php?t=466969

03-18-2013, 02:56 PM	#7
kevinr1970 Senior Member Join Date: Aug 2004 Location: Everett, WA Posts: 2,316	Re: What is this for? OK, it's a fuel filter, I guess I could have read that myself! But my focus was on replacing the fuel filler hoses, and noticed that thing. So is that a deisel thing or woould it have been used for gas? The one line doesn't go anywhere, sort of loops around and is tucked in the frame. The other one disappears behind the heatshield in front of it. Hmmm... __________________ 2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold)

03-18-2013, 04:35 PM	#8
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: What is this for? Maybe it had some kind of auxiliary motor in the box at some time like a water pump or a salter. Any weird holes in the box? Maybe somebody decided that they didn't like clamp-on inline filters??? Posted via Mobile Device __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

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