Gas tank replacement - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GM72K10 · 10-23-2005, 07:35 AM

HI guys
Picked up an 85 K20 Plow truck last winter on the cheap that has sat since the last snow. Gas tank leaks. Is this an easy swap and any reccomendations for who to buy a replacement from? Thanks

SlapFish · 10-23-2005, 09:50 AM

I just ordered one from LMC truck. I'll tell you how it goes. It's a 20 gallon in a 1985 C10 LWB.

beaterC10 · 10-23-2005, 09:52 AM

The swap isn't too tough.

Support the tank, disconnect the filler at the bed, remove the ground wire attachment on the inside of the frame rail, and pull the bolts that attach the tank hangers to the frame. You can lower the tank enough to disconnect the three fuel lines from the sender and finally remove the tank with the hangers.

Be prepared to replace the tank hangers and the sender if the tank leaks, I had too on my street driven 84. I pulled my tank to fix the plastic tank cover that had dropped and had to replace everything because of rust.

Turbo85GMC · 10-23-2005, 10:32 AM

I just buttoned up my tank re-install this weekend. My number one tip: Take Off The Bed! I didn't because I thought I could just do it from underneath. It was a huge pain to do the whole thing from underneath. I agree with replacing the tank hangers while you're under there. Mine were all rusted out. Also, the plastic cover (if you have one) traps water and sand which causes the tank to rust faster. Drill some drain holes in it if you're going to put it back on.

C&C Chevy · 10-23-2005, 11:02 AM

I'd get a plastic one, if I lived where you do..

SSC's76 · 10-23-2005, 12:08 PM

Hard to take it off from underneath?

It takes me 20 minutes or so to swap one over.

Where is the leak? Is it huge, a pin hole or is the whole thing rusted out?

If it's not too bad of a hole they make a two part compound to repair the tank. It's $8 clean the surface mix the putty slap it over the hole and your done. Ive used this on older motor homes which replacment tanks are nearly impossible to get and it does the job.

If you wanted new I'd try http://www.performanceradiator.com/ They sell new gas tanks fairly reasonable price.
Used try. http://www.car-part.com/

GM72K10 · 10-24-2005, 06:06 AM

Thanks!

**Captkaos** · 10-24-2005, 05:06 PM

I can get steel replacement for about $130 + shipping.

u2slow · 10-24-2005, 10:12 PM

I get them from a local supplier. They are Spectra-Premium brand, and they're under $100 CDN.

7tcutty · 10-29-2005, 09:12 PM

you can get tanks from ebay DIRT CHEAP check out A1 auto.. plastic is the best for norther areas. i just got a renu gastank from the local place paid to much 141$ for it and had to give them an old tank. they guy told me that the have a lifetime warranty on them so i cant complain to much on the price. they are coated with PVC inside and out. i also seen an older one on a truck in the J yard and it was in GREAT SHAPE so i would also check that route out..

karl

86 GMG · 11-02-2005, 11:15 AM

just a guestion but what have you used to replace the for a lack of words gasket between the tank and straps i used a self adhesive rubber padding it seems to be fine but curious what else has been used? thanks guys

u2slow · 11-02-2005, 11:23 PM

I cut an tire-tube into strips and used that.

10-23-2005, 07:35 AM	#1
GM72K10 Next! Join Date: Jan 2003 Location: Eastern Pa. Posts: 2,483	Gas tank replacement HI guys Picked up an 85 K20 Plow truck last winter on the cheap that has sat since the last snow. Gas tank leaks. Is this an easy swap and any reccomendations for who to buy a replacement from? Thanks __________________ 86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck

10-23-2005, 09:50 AM	#2
SlapFish Real Men Wear Orange Join Date: Oct 2005 Location: NC Posts: 89	Re: Gas tank replacement I just ordered one from LMC truck. I'll tell you how it goes. It's a 20 gallon in a 1985 C10 LWB.

10-23-2005, 09:52 AM	#3
beaterC10 Senior Member Join Date: Jul 2003 Location: Indianapolis, IN Posts: 1,277	Re: Gas tank replacement The swap isn't too tough. Support the tank, disconnect the filler at the bed, remove the ground wire attachment on the inside of the frame rail, and pull the bolts that attach the tank hangers to the frame. You can lower the tank enough to disconnect the three fuel lines from the sender and finally remove the tank with the hangers. Be prepared to replace the tank hangers and the sender if the tank leaks, I had too on my street driven 84. I pulled my tank to fix the plastic tank cover that had dropped and had to replace everything because of rust.

10-23-2005, 10:32 AM	#4
Turbo85GMC Registered User Join Date: Apr 2005 Location: Medford, MA Posts: 307	Re: Gas tank replacement I just buttoned up my tank re-install this weekend. My number one tip: Take Off The Bed! I didn't because I thought I could just do it from underneath. It was a huge pain to do the whole thing from underneath. I agree with replacing the tank hangers while you're under there. Mine were all rusted out. Also, the plastic cover (if you have one) traps water and sand which causes the tank to rust faster. Drill some drain holes in it if you're going to put it back on. __________________ '85 GMC 1500 "Friends don't let friends drive stock!"

10-23-2005, 11:02 AM	#5
C&C Chevy Registered User Join Date: Feb 2003 Location: Midwest City, OK Posts: 1,001	Re: Gas tank replacement I'd get a plastic one, if I lived where you do.. __________________ Robert Current: 1986 SWB Silverado 4.3 / TH400 Past: 1985 SWB Silverado 305 / TH350 - sold 1995 1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007

10-23-2005, 12:08 PM	#6
SSC's76 No No Join Date: Jun 2005 Location: Pueblo Colorado Posts: 1,781	Re: Gas tank replacement Hard to take it off from underneath? It takes me 20 minutes or so to swap one over. Where is the leak? Is it huge, a pin hole or is the whole thing rusted out? If it's not too bad of a hole they make a two part compound to repair the tank. It's $8 clean the surface mix the putty slap it over the hole and your done. Ive used this on older motor homes which replacment tanks are nearly impossible to get and it does the job. If you wanted new I'd try http://www.performanceradiator.com/ They sell new gas tanks fairly reasonable price. Used try. http://www.car-part.com/ __________________ 1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler Last edited by SSC's76; 10-23-2005 at 12:11 PM.

10-24-2005, 06:06 AM	#7
GM72K10 Next! Join Date: Jan 2003 Location: Eastern Pa. Posts: 2,483	Re: Gas tank replacement Thanks! __________________ 86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck

10-24-2005, 05:06 PM	#8
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: Gas tank replacement I can get steel replacement for about $130 + shipping. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

10-24-2005, 10:12 PM	#9
u2slow Web Wheeler Join Date: Jan 2000 Location: BC, Canada, eh? Posts: 388	Re: Gas tank replacement I get them from a local supplier. They are Spectra-Premium brand, and they're under $100 CDN. __________________ '66 C10 longstep - Clifford equiped '84 C20 Suburban 6.2L - awaiting 4x4 conversion '91 V3500 Crewcab - awaiting diesel swap

10-29-2005, 09:12 PM	#10
7tcutty Registered User Join Date: Oct 2005 Location: lansing mi Posts: 17	Re: Gas tank replacement you can get tanks from ebay DIRT CHEAP check out A1 auto.. plastic is the best for norther areas. i just got a renu gastank from the local place paid to much 141$ for it and had to give them an old tank. they guy told me that the have a lifetime warranty on them so i cant complain to much on the price. they are coated with PVC inside and out. i also seen an older one on a truck in the J yard and it was in GREAT SHAPE so i would also check that route out.. karl

11-02-2005, 11:15 AM	#11
86 GMG Registered User Join Date: Apr 2005 Location: Tulsa Oklahoma Posts: 943	Re: Gas tank replacement just a guestion but what have you used to replace the for a lack of words gasket between the tank and straps i used a self adhesive rubber padding it seems to be fine but curious what else has been used? thanks guys __________________ square body trucks an addiction or an investment either way they consume all my extra time and money

11-02-2005, 11:23 PM	#12
u2slow Web Wheeler Join Date: Jan 2000 Location: BC, Canada, eh? Posts: 388	Re: Gas tank replacement I cut an tire-tube into strips and used that. __________________ '66 C10 longstep - Clifford equiped '84 C20 Suburban 6.2L - awaiting 4x4 conversion '91 V3500 Crewcab - awaiting diesel swap



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