how big is the gas tank behind seat - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pete29 · 03-09-2009, 04:46 PM

how many gallon is the gas tank behind the seat of a 72 gmc.

**leddzepp** · 03-09-2009, 04:54 PM

around 14 gals

oldblue1968chevy · 03-09-2009, 05:02 PM

i heard 16..

not very big lol

Sinister · 03-09-2009, 05:12 PM

I thought they were 20 gallons.

**chev-obsession** · 03-09-2009, 05:18 PM

they are 20 gallons. my owners manual says so!

Longhorn Man · 03-09-2009, 05:18 PM

most are about 21 1/2 gallons.
There were some that were 16 - 17 gallons, but there is no documentation of it anywhere.

oldblue1968chevy · 03-09-2009, 05:29 PM

well, lucky me i got the 16 gallon tank lol

Stock72c10 · 03-09-2009, 05:30 PM

Mine's a 72 Chevy, but I have put over 20 gallons in it (or at least that is what the pump said).

Andy4639 · 03-09-2009, 05:34 PM

I've got the 20-21 gal. tank if some one is interested in it. Vent tubes everything you need.
PM me if so.

**leddzepp** · 03-09-2009, 06:50 PM

I have never been able to put more than about 15 gals in either of the tanks in my 72's. Maybe the gauge is off slightly....of course, I have never run them bone dry either!

**john** · 03-09-2009, 07:07 PM

I dont know if it carried through to the 67-72 trucks, but i worked for a company that had alot of 1964 gmc's. The v/6 trucks had a 20 gal. and the l-6 trucks all had 16 gal tanks.

**'68OrangeSunshine** · 03-10-2009, 06:12 AM

I have a '68 C/10 with factory L6 [292], the stock tank has taken almost 22 gallons. That is with the drivers side wheels higher than the passenger side -- kinda like filling a tall beer glass from a keg.
I like the in-cab tank a lot better than the tank in my K/5. It fills fast and doesn't 'burp'. Plus there's that element of danger. I'm bad because I'm leaning back on 20 gallons of highly flammable liquid, and I don't give a damn.

71MUTT · 03-10-2009, 02:16 PM

Quote:

Originally Posted by '68OrangeSunshine

I'm bad because I'm leaning back on 20 gallons of highly flammable liquid, and I don't give a damn.

Real men have gas in the cab!!!!!!

ahhhhhhhhrrrrrrrrrrrrrrrrrrrrr

Elephanthead · 03-10-2009, 04:09 PM

I also keep a spare can on the passenger side floor just in case. You can't have enough fuel in the passenger compartment.

Hammer57 · 03-10-2009, 05:40 PM

Quote:

Originally Posted by Elephanthead

I also keep a spare can on the passenger side floor just in case. You can't have enough fuel in the passenger compartment.

Waaaaaaaaayyyyyyyy too funny!!!!!
Sending mine to "the back of the bus".

**El Jay** · 03-10-2009, 06:35 PM

I've put a shade over 20 gal. in both of mine.

71MUTT · 03-10-2009, 07:29 PM

Quote:

Originally Posted by Elephanthead

I also keep a spare can on the passenger side floor just in case. You can't have enough fuel in the passenger compartment.

X2

chevydog66 · 03-10-2009, 07:40 PM

Mine takes about 20, also. I like smoking in the cab of my truck and then throwing the cigarette out the window past the filler neck where the fumes are. Mine is going to the back too in a few weeks.

Porterhausen · 03-11-2009, 02:34 PM

Quote:

Originally Posted by chevydog66

Mine takes about 20, also. I like smoking in the cab of my truck and then throwing the cigarette out the window past the filler neck where the fumes are. Mine is going to the back too in a few weeks.

Thats why I'm moving mine back asap.

**** burning down in the truck, known too many people to get ****ed up/ die in vehicle fires. The only thing I am paranoid about. and all that ****ing gass right behind my back seems stupid.

**leddzepp** · 03-11-2009, 11:23 AM

Now that I know it holds 20 gals instead of 14, I am going to set my ashtray on top of the tank on the passenger side. That way I can rest my arm across the top of the seat and ash at the same time.

72BlckButy · 03-11-2009, 02:39 PM

Okay guys since we're talking gas... tell me about the gas gauge.

When your tank is full, does the needle go past the white dashes into the black portion to the right of the Full mark? Or is it supposed to stop at the last white dash on the top right of the gauge?

If you can't tell, my old truck's gauge never worked, but my new truck does. Just trying to figure out what it's like to own a truck with a working gas gauge...

monte0185 · 03-11-2009, 03:42 PM

Quote:

Originally Posted by 72BlckButy

Okay guys since we're talking gas... tell me about the gas gauge.

When your tank is full, does the needle go past the white dashes into the black portion to the right of the Full mark? Or is it supposed to stop at the last white dash on the top right of the gauge?

If you can't tell, my old truck's gauge never worked, but my new truck does. Just trying to figure out what it's like to own a truck with a working gas gauge...

White marks?? You must have one of them there fancy sticks behind your seat!! Mine just has notches from my pocket knife.

Thats just funny right there I dont care who ya are!!

chevydog66 · 03-11-2009, 02:51 PM

Mine stops right on the full mark. I also have a repop sending unit, cause mine quit working a few years ago.

03-09-2009, 04:46 PM	#1
pete29 Registered User Join Date: Dec 2007 Location: Knoxville, Iowa Posts: 122	how big is the gas tank behind seat how many gallon is the gas tank behind the seat of a 72 gmc.

03-09-2009, 04:54 PM	#2
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,022	Re: how big is the gas tank behind seat around 14 gals

03-09-2009, 05:02 PM	#3
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: how big is the gas tank behind seat i heard 16.. not very big lol __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

03-09-2009, 05:12 PM	#4
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: how big is the gas tank behind seat I thought they were 20 gallons. __________________ Beat it to fit, Paint it to match...

03-09-2009, 05:18 PM	#5
chev-obsession Senior Member Join Date: Jul 2008 Location: kennewick, WA Posts: 1,513	Re: how big is the gas tank behind seat they are 20 gallons. my owners manual says so!

03-09-2009, 05:18 PM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: how big is the gas tank behind seat most are about 21 1/2 gallons. There were some that were 16 - 17 gallons, but there is no documentation of it anywhere.

03-09-2009, 05:29 PM	#7
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: how big is the gas tank behind seat well, lucky me i got the 16 gallon tank lol __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

03-09-2009, 05:30 PM	#8
Stock72c10 classic=of recognized value Join Date: Sep 2008 Location: Wichita, KS Posts: 317	Re: how big is the gas tank behind seat Mine's a 72 Chevy, but I have put over 20 gallons in it (or at least that is what the pump said).

03-09-2009, 05:34 PM	#9
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: how big is the gas tank behind seat I've got the 20-21 gal. tank if some one is interested in it. Vent tubes everything you need. PM me if so. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

03-09-2009, 06:50 PM	#10
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,022	Re: how big is the gas tank behind seat I have never been able to put more than about 15 gals in either of the tanks in my 72's. Maybe the gauge is off slightly....of course, I have never run them bone dry either!

03-09-2009, 07:07 PM	#11
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: how big is the gas tank behind seat I dont know if it carried through to the 67-72 trucks, but i worked for a company that had alot of 1964 gmc's. The v/6 trucks had a 20 gal. and the l-6 trucks all had 16 gal tanks. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

03-10-2009, 06:12 AM	#12
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,440	Re: how big is the gas tank behind seat I have a '68 C/10 with factory L6 [292], the stock tank has taken almost 22 gallons. That is with the drivers side wheels higher than the passenger side -- kinda like filling a tall beer glass from a keg. I like the in-cab tank a lot better than the tank in my K/5. It fills fast and doesn't 'burp'. Plus there's that element of danger. I'm bad because I'm leaning back on 20 gallons of highly flammable liquid, and I don't give a damn. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 03-10-2009 at 06:25 AM.

03-10-2009, 04:09 PM	#14
Elephanthead Registered User Join Date: Nov 2008 Location: Carmel, IN Posts: 187	Re: how big is the gas tank behind seat I also keep a spare can on the passenger side floor just in case. You can't have enough fuel in the passenger compartment.

03-10-2009, 06:35 PM	#16
El Jay Gone to greener pastures Join Date: May 2007 Location: Gateway to the Delta Posts: 7,354	Re: how big is the gas tank behind seat I've put a shade over 20 gal. in both of mine. __________________ '69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck

03-10-2009, 07:40 PM	#18
chevydog66 GM ONLY BABY!!! Join Date: Oct 2003 Location: Fort Wayne, IN. Posts: 1,998	Re: how big is the gas tank behind seat Mine takes about 20, also. I like smoking in the cab of my truck and then throwing the cigarette out the window past the filler neck where the fumes are. Mine is going to the back too in a few weeks. __________________ 2 wrongs don't make a right, but 3 lefts do. 66 Chevelle Malibu 406ci, 573hp, 10.99@121mph 96 Chevy Silverado Z71 72 GMC 1500 Super Custom LS 6.0/4L65 on airride http://www.cardomain.com/ride/707879...mc-c-k-pick-up Last edited by chevydog66; 03-10-2009 at 07:41 PM.



Register or Log In To remove these advertisements.

03-11-2009, 11:23 AM	#20
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,022	Re: how big is the gas tank behind seat Now that I know it holds 20 gals instead of 14, I am going to set my ashtray on top of the tank on the passenger side. That way I can rest my arm across the top of the seat and ash at the same time.

03-11-2009, 02:39 PM	#21
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: how big is the gas tank behind seat Okay guys since we're talking gas... tell me about the gas gauge. When your tank is full, does the needle go past the white dashes into the black portion to the right of the Full mark? Or is it supposed to stop at the last white dash on the top right of the gauge? If you can't tell, my old truck's gauge never worked, but my new truck does. Just trying to figure out what it's like to own a truck with a working gas gauge... __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

03-11-2009, 02:51 PM	#23
chevydog66 GM ONLY BABY!!! Join Date: Oct 2003 Location: Fort Wayne, IN. Posts: 1,998	Re: how big is the gas tank behind seat Mine stops right on the full mark. I also have a repop sending unit, cause mine quit working a few years ago. __________________ 2 wrongs don't make a right, but 3 lefts do. 66 Chevelle Malibu 406ci, 573hp, 10.99@121mph 96 Chevy Silverado Z71 72 GMC 1500 Super Custom LS 6.0/4L65 on airride http://www.cardomain.com/ride/707879...mc-c-k-pick-up

Register or Log In To remove these advertisements.