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#1 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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How many gallons of fuel does a stock tank hold?
My tank is stock in the cab on my truck. When I filled it up the other day, it had exactly 1/8 and when the pump stopped it went almost 1/4 past the full mark. It took 12.36 gallons. I always thought these trucks had about 21 gallons. If that is the case I had about 8 gallons left at the 1/8 mark
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#2 |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: How many gallons of fuel does a stock tank hold?
The most I have ever put in was 19.5 gallons.
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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#3 |
Senior Member
![]() Join Date: Jul 2006
Location: Leander, Texas
Posts: 850
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Re: How many gallons of fuel does a stock tank hold?
Me too 19.5.....
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#4 |
Born To Lose Club
![]() Join Date: Feb 2003
Location: Calgary, Alberta/Oxenden, Ontario, Great White North
Posts: 13,306
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Re: How many gallons of fuel does a stock tank hold?
I think they are considered 17 gal. tanks but you can fit as you guys have said 19 gals or so. Pretty sure Blazer and Suburban tanks are 21 gal. Be interesting to see what the Burb Blazer owners out there manage to squeeze in their tanks...
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Brian Smith ![]() 1969 Chevrolet K10 LWB Fleetside - Proud Owner For 20 Yrs - 1 of 208 Built & Sold In Canada! - 283 V8/350TH/NP208, 2" All Spring Lift, 32" Good Year MT/R's. 1972 GMC K2500 Custom LWB Fleetside - Proud Owner For 2 Yrs - 1 of 571 Built & Sold In Canada! - 350 V8/SM465/NP205, 4” Rough Country Lift, 33” Interco TSL Thornbirds 2007.5 GMC Sierra SLE 2500HD 4x4 - Proud Owner For 15 Yrs - 6.6L V8 Duramax Diesel/Allison 1000, 2" Lift, 33" Mickey Thompson MTZ's. 2008 Yamaha Raptor 700r - Proud Owner For 13 Yrs - ITP Mud Lites. 2015 John Deere 1025R - Proud Owner For 6 Yrs - 24HP Diesel/H120/54D/260B/SB1154. |
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#5 | |
WTB this ad
Join Date: Sep 2004
Location: Lafayette Georgia
Posts: 5,074
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Re: How many gallons of fuel does a stock tank hold?
Quote:
C,K10 Panel, Suburban, Blazer 20.5 C,K20 Panel, Suburban, Blazer 23.5 |
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#6 |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,282
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Re: How many gallons of fuel does a stock tank hold?
The tank in my '70 is stock, but the sender has been replaced by the PO (from LMC) and my gauge will be on the empty line and I have approximately 4 gallons left. I can run about 50-55 miles after empty, and I get between 14-15 mpg. I think it holds 20 gallons. I have run about 300 miles (on a full tank) and then filled it up (to the top of the fill tube) and it took 19.87 gallons, so I'd say 20.2 is correct. Do these tanks have a baffle in them or something? When filling it up and the pump kicks off, I can hear a gurgling sound coming from the filler neck. If I wait a minute or two, I can squeeze another gallon or two in it. Sorry for the long ramble...
Stovebolt
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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#7 |
Registered User
Join Date: Oct 2016
Location: san bernardino ca
Posts: 1,611
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Re: How many gallons of fuel does a stock tank hold?
I cant find a true answer?
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#8 |
Registered User
Join Date: Mar 2005
Location: Just outside Durham, NC
Posts: 894
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Re: How many gallons of fuel does a stock tank hold?
Most I have put in mine was just over 16gallons, I always figure it was a 16 gallon tank, with about 2 gallons fitting in the plumbing (one tick mark or 1/8th always seemed to be just over 2 gallons of gas).....good to know I have an extra gallon or two I didn't know about.
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1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's ![]() 1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM! |
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#9 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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Re: How many gallons of fuel does a stock tank hold?
I'm really starting to think 16 max. It would take 7/8 to get to the full mark and it's about 1/4 past so that's 9/8 total and it held 12.36 in addition to what was in there. It doesn't add up
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#10 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: How many gallons of fuel does a stock tank hold?
All the books say aprox 21 gallons, and I put 21.75 gallons in my first truck once. This truck I have put 21 even in it before. My GMC was the same...20-ish at once.
There seems to have been a 17 gallon tank that was installed in a lot of trucks, but up untill now I had only heard if it in 67 and 68 trucks. ![]() |
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#11 | |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
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Re: How many gallons of fuel does a stock tank hold?
Quote:
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#12 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,635
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Re: How many gallons of fuel does a stock tank hold?
Yup -- it's been a long time, but I used to run it empty (I also have saddle tanks) and I know it took about 21 gallons or so.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#13 |
Born To Lose Club
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Location: Calgary, Alberta/Oxenden, Ontario, Great White North
Posts: 13,306
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Re: How many gallons of fuel does a stock tank hold?
I wonder if my tank is the smaller 17 gal too. I do remember the PO saying he used a lot parts from a 68 parts truck. Hmmm....
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Brian Smith ![]() 1969 Chevrolet K10 LWB Fleetside - Proud Owner For 20 Yrs - 1 of 208 Built & Sold In Canada! - 283 V8/350TH/NP208, 2" All Spring Lift, 32" Good Year MT/R's. 1972 GMC K2500 Custom LWB Fleetside - Proud Owner For 2 Yrs - 1 of 571 Built & Sold In Canada! - 350 V8/SM465/NP205, 4” Rough Country Lift, 33” Interco TSL Thornbirds 2007.5 GMC Sierra SLE 2500HD 4x4 - Proud Owner For 15 Yrs - 6.6L V8 Duramax Diesel/Allison 1000, 2" Lift, 33" Mickey Thompson MTZ's. 2008 Yamaha Raptor 700r - Proud Owner For 13 Yrs - ITP Mud Lites. 2015 John Deere 1025R - Proud Owner For 6 Yrs - 24HP Diesel/H120/54D/260B/SB1154. |
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#14 |
Senior Member
Join Date: Oct 2004
Location: calhoun city ms
Posts: 940
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Re: How many gallons of fuel does a stock tank hold?
My 1970 250 cyl, 3 speed manual would hold right around 20 gallons as mentioned previously and I know it was the factory tank.
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ongoing 1970 c 10 lwb ![]() 1994 z-28 few mods.-owned since new ![]() 1978 vette silver/grey 25th anniv. paint ![]() |
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#15 |
WTB this ad
Join Date: Sep 2004
Location: Lafayette Georgia
Posts: 5,074
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Re: How many gallons of fuel does a stock tank hold?
My owners manual says 20.2 U.S. gallons . That's for a C,K10. Now a C20,30 is listed as holding 21 gallons.
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#16 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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Re: How many gallons of fuel does a stock tank hold?
Thanks see ten. Anybody else's gauge reading like mine?. I'm paranoid about running out of gas but it sounds like there's alot more in there at the 1/8 mark than I thought. My other problem is my speedo gear is reading about 10mph faster so the odometer goes around quicker making it look like I drove more miles!.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#17 |
sufficiently talented fool
![]() Join Date: Jun 2006
Location: Forest Hill, MD
Posts: 2,231
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Re: How many gallons of fuel does a stock tank hold?
Jim
I have a gas tank and sender if you want them.... Bob
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"it's impossible to be surrounded by idiots when you are part of the circle" ![]() 2003 Suburban 2002 Pontiac Montana 1981 Corvette 1966 Impala Convertible Click here to support the board |
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#18 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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Re: How many gallons of fuel does a stock tank hold?
Thanks for the offer Bob but I'll probably just leave well enough alone and keep my eye on it for now.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#19 |
Senior Member
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Location: Lewisville, Nc
Posts: 10,234
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Re: How many gallons of fuel does a stock tank hold?
mine reading empty took 12 gals run it a week behind empty 21 gals
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#20 |
Registered User
Join Date: Jun 2006
Location: WVa
Posts: 758
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Re: How many gallons of fuel does a stock tank hold?
SWB=16 LWB=20 on pickups doesnt it?
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#21 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: How many gallons of fuel does a stock tank hold?
One of mine was a SWB 1/2 ton, and it took 20-ish once.
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#22 |
Like a Rock!
Join Date: May 2002
Location: USA
Posts: 1,092
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Re: How many gallons of fuel does a stock tank hold?
Maybe centsless or somebody with a tank already removed, would be willing to fill one up with water and let us all know the amount!
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69 LWB Runs great - work in progress Mess with me and you mess with the whole trailer park! ![]() Last edited by c10crazy; 08-22-2006 at 09:24 AM. |
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#23 |
Registered User
![]() Join Date: Feb 2013
Location: Spring Hill, Florida
Posts: 465
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Re: How many gallons of fuel does a stock tank hold?
I was always under the impression that the in cab tank was 17.5 gal. Most I have put in my 70 long bed is about 16, but I always fill up before I get to far below 1/4. I pulled the tank to paint the cab so I should be able to get a hard number here in a week or two when I get her back up and running... If I ever get the wiring finished.
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#24 |
Registered User
Join Date: Jul 2002
Location: St. James, MO
Posts: 1,239
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Re: How many gallons of fuel does a stock tank hold?
Both of the tanks I've had--one in the '67 and one in the '69--are the 20.x gal tank.
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'69 Longstep K-10: 327/SM465/T-221/Closed Knuckle Dana44/12-bolt. |
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#25 |
Registered User
Join Date: Jan 2011
Location: Lynn Haven Florida
Posts: 1,019
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Re: How many gallons of fuel does a stock tank hold?
i've never put over 15 in mine dead empty, so im guessing it is 16 gal. tank, but i've had people on this board, tell me i'm wrong
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"Send in the clowns the goats are loose" |
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