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#1 |
Like a Rock!
Join Date: May 2002
Location: USA
Posts: 1,092
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How many gallons of gas???
I know my gas gauge is not that accurate but how many gallons of gas does our 67-72 trucks hold???
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69 LWB Runs great - work in progress Mess with me and you mess with the whole trailer park! ![]() |
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#2 |
Registered User
![]() Join Date: Feb 2011
Location: Murrieta, California
Posts: 234
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Re: How many gallons of gas???
Someone can correct me, but I believe the standard tank behind the seat is 21 gallons.
Paul Posted via Mobile Device
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1969 C/20, 307, 4-speed, rusty with manual steering and brakes! |
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#3 |
Like a Rock!
Join Date: May 2002
Location: USA
Posts: 1,092
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Re: How many gallons of gas???
That was the number that was in my head too! Tonight I was on a quarter tank and I filled it up with 9.5 gallons and the needle is almost a quarter past the full mark! That means when I'm showing a quarter tank it's almost a half tank! Do I have a bad gauge or sending unit???
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69 LWB Runs great - work in progress Mess with me and you mess with the whole trailer park! ![]() |
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#4 |
Registered User
Join Date: Jan 2011
Location: Lynn Haven Florida
Posts: 1,019
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Re: How many gallons of gas???
behind the seat is 16 gallons, the aftermarket tanks that go between the frame rails are 20
Last edited by Fldawg; 07-15-2011 at 11:37 PM. Reason: forgot |
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#5 |
Registered User
Join Date: Feb 2011
Location: North Carolina
Posts: 993
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Re: How many gallons of gas???
i was under the assumption having the suicide tank was only 21 gal.... hmm i never even realized because i dont ever fill her up.
Last edited by elf w/capital T; 07-15-2011 at 11:54 PM. Reason: i was reading the post before me :hammer: |
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#6 |
Registered User
Join Date: Aug 2009
Location: Tomball, TX
Posts: 578
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Re: How many gallons of gas???
I've heard 20 for 1/2 tons and 21 for 3/4 ton+, I just filled mine from empty took 20 gal.
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'68 C10 LWB 6.2NA/NP833 3.73's |
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#7 |
Registered User
![]() Join Date: Feb 2011
Location: Murrieta, California
Posts: 234
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Re: How many gallons of gas???
In the LMC catalog, the replacement tank behind the seat is 20 gallons and the Blazer tank is 21 gallons.
Paul Posted via Mobile Device
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1969 C/20, 307, 4-speed, rusty with manual steering and brakes! |
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#8 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,143
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Re: How many gallons of gas???
My 72 owners manual says 20 gallon capacity.
Posted via Mobile Device
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#9 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: How many gallons of gas???
21 gallons. I've had them take over 20 gallons.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 07-16-2011 at 06:04 AM. |
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#10 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,635
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Re: How many gallons of gas???
Tanks behind the seats apparently came in two different sizes... I believe 20+ gallon was most common.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#11 |
Like a Rock!
Join Date: May 2002
Location: USA
Posts: 1,092
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Re: How many gallons of gas???
Thanks for all the replies. I can't find my service manual that's why I posted. Now I have to determine if my gas gauge is the problem or my fuel sending unit. I'm guessing since they are both technically working (just not accurate) it's the gauge?
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69 LWB Runs great - work in progress Mess with me and you mess with the whole trailer park! ![]() |
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#12 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,005
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Re: How many gallons of gas???
I know somebody here who has one
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#13 |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,282
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Re: How many gallons of gas???
I can fit a little over 20 in mine from bone dry, but that is filling the neck also. I know, you're not supposed to do that since the cap is not vented, but when you get 14-15 mpg you want all the capacity you can get!!
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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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#14 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,635
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Re: How many gallons of gas???
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#15 | ||
Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: How many gallons of gas???
Quote:
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Try 8.2 MPG. That's the highest I have got with my 383 so far. It likes to ![]() |
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#16 | |
Registered User
Join Date: Jan 2011
Location: Redmond, OR
Posts: 758
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Re: How many gallons of gas???
Quote:
Mine turned out to be a bad sending unit - $30 later all was well.
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68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress |
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#17 |
Registered User
![]() Join Date: Jul 2011
Location: Idaho
Posts: 22
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Re: How many gallons of gas???
pull the carpet sill on the drivers side and check the wire. I have found that it typically goes bad in this area.
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#18 |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,282
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Re: How many gallons of gas???
What if it goes to about 2 o'clock when it is full and hits empty when it's got about a quarter of a tank left? Is there any way to "calibrate" the gauge? Mine works fine other than it seems to be off.
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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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#19 |
Registered User
![]() Join Date: Oct 2009
Location: South Denver Metro, CO
Posts: 385
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Re: How many gallons of gas???
Again, 20 plus, but you are into the neck and it will slosh out. I have two saddle tanks two: one at 19 and the other around 12 gallons. With my 400, I would love to get 14 MPG. After all the carb work, I think I'm at 11 MPG and that's being easy on the pedal. Neither saddle tank is connected to the gauge. I run them out first and then switch to the main tank.
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#20 | |
Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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Re: How many gallons of gas???
Quote:
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#21 |
Scrapper 1
Join Date: Jan 2007
Location: Riverside Calif
Posts: 1,649
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Re: How many gallons of gas???
well when gas was 1.00 a gallon back many moons ago back in 1989 my 1965 3/4 ton truck I could only get 16.00 into my tank so that mean's i have a 16 gallon tank and with a 350 with a 2 speed power glide with 4;10 gears running 235-85-16 tire's motor home 10 ply radials when there new I get 14 MPG with a 290 HP engine crate engine i run the smaller tires the 9.50 I can't get over 55 Mph with out it revving up past 4000 RPM's But buy running the 235-85-16 tall tire By 2 inches taller I changed my gearing by 377 But the power glide dose not help cus its a 2 speed But only had the power glide out 2 times do to seals and i have over 2 million Miles on the truck.From 1991 i put over 890K miles on this truck before that it use to be a long haul truck for UCR collage orange groves In Calif more of less SUNKIST oranges
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