what size is our gas tank? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

red72chevy · 07-20-2003, 03:01 PM

I'm tryin to figure out the gas mielage....so what size is our gas tank, i just went 125 miles on half a tank and was wonderin how big our tank was i think its like 15 but i wanna know for sure....thanks!

Lumpy · 07-20-2003, 03:07 PM

I believe it is right around 19 gallons. Lumpy

ddsmith · 07-20-2003, 03:09 PM

Not big enough! That's why I have three.

Longhorn Man · 07-20-2003, 03:21 PM

About 20 gallons. I think 71/72 was a little over 21.
Best way to figure your mileage is to go and fill back up and use the gallons used to fill as your number to be divided by the 150 miles you drove.

krazy_texan · 07-20-2003, 03:34 PM

my 69 owners manual says it is a 20 gallon tank but like longhornmail said the 71-72s could be bigger i am not sure on that.

Project1970 · 07-20-2003, 04:34 PM

I've put 21.0-something gallons in mine once.

Didn't have the money to fill it up when I ran it actually dry, though.

Mine's also got a huge strange dent in it, though...

**Stocker** · 07-20-2003, 06:34 PM

Quote:

Originally posted by ddsmith
Not big enough! That's why I have three.

Yup! I pumped in just over 50 gallons once.

71 fun · 07-20-2003, 07:31 PM

If ypu put 19.4 gal. in and drive 200 miles you will be walking the last 34 miles.

SEVEND2 · 07-20-2003, 08:36 PM

I think my 72 is a 20- 23 gal tank, (behind seat)

cdowns · 07-20-2003, 09:00 PM

if your trying to figure out gas milage forget about the gauge they are only a rough estimate of fuel usage !!! the only proper way is to fill your tank go X amount of miles then fill the tank up and assuming your speedo and odometer are correct dividing the miles by the gallons will give you the mpg

cheatham · 07-20-2003, 09:22 PM

Owners Manual Says:

Series and Models Tank Location Gal.

C, K10 CABS Back of seat in Cab 20.2
C20, 30 CABS Back of seat in Cab 21.0
C30 FLAT FACE COWL Outside LH side Rail 21.0
P10 FORWARD CONTROL Inside frame behind rear axle 16.8
P20, 30 FORWARD CONT. Outside RH side rail 30.0
C, K10 PANEL, SUB, BLAZER Inside frame behind rear axle 20.5
C, K20 PANEL, SUB, BLAZER Inside frame behind rear axle 23.5

Longhorn Man · 07-20-2003, 09:32 PM

Quote:

Owners Manual Says:

Series and Models Tank Location Gal.

C, K10 CABS Back of seat in Cab 20.2

While that is true, I put 21.75 in mine once.

nroden · 07-20-2003, 11:19 PM

I always figure by the 20.2 in the manual BUT once at BP I put in 22 gal and still had 1/4 of a tank left when i started. I went and argued with the man.. some kind of foreigner. His wife comes into Pamida thinking everything is a dollar... aggrivating. I paid it but never will go back. This is why I always buy from the same Phillips 66 station.... 90% of the time. I trust them. These BP Amacos that are replacing everything around here seem to be chaseing off business. They come in and then before you know it no one is going to them stations.

ABHaulR · 07-21-2003, 02:45 AM

We have a stock 52 Gallon Tank in our 72' suburban. When gas prices where real high, we'd have to rob the bank before we went to the gas station. The get away sub could drive for 10 hours on a tank of gas though!

07-20-2003, 03:01 PM	#1
red72chevy Registered User Join Date: Oct 2001 Posts: 23	what size is our gas tank? I'm tryin to figure out the gas mielage....so what size is our gas tank, i just went 125 miles on half a tank and was wonderin how big our tank was i think its like 15 but i wanna know for sure....thanks!

07-20-2003, 03:07 PM	#2
Lumpy 2 tons of fun Join Date: Dec 2001 Location: Central, Ca Posts: 194	I believe it is right around 19 gallons. Lumpy __________________ 67 Chevy,Short/Fleet,350,Saginaw 4-Speed,Lowered 4x2,small window,P/S,Edelbrock Intake/Carb,HEI,Gear Drive,Crane Cam 274H Three Rivers, Ca Pics at: http://www.cardomain.com/id/lumpy454

07-20-2003, 03:09 PM	#3
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	Not big enough! That's why I have three. __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper

07-20-2003, 03:34 PM	#5
krazy_texan Registered User Join Date: Oct 2002 Location: West Des Moines, Ia Posts: 3,233	my 69 owners manual says it is a 20 gallon tank but like longhornmail said the 71-72s could be bigger i am not sure on that. __________________ Krazy Texan My Trucks are made with Wrenches not Chop Sticks 1967 GMC 3/4 ton "Johnny Cash" 1990 v1500 suburban 1967 Ford f100 Swb 4x4 "green bean" GOD BLESS JESUS, JOHN WAYNE, AND THE ALAMO

07-20-2003, 04:34 PM	#6
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	I've put 21.0-something gallons in mine once. Didn't have the money to fill it up when I ran it actually dry, though. Mine's also got a huge strange dent in it, though... __________________ Project1970 - LS1 Swap Complete!

07-20-2003, 03:21 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	About 20 gallons. I think 71/72 was a little over 21. Best way to figure your mileage is to go and fill back up and use the gallons used to fill as your number to be divided by the 150 miles you drove.

07-20-2003, 07:31 PM	#8
71 fun Registered User Join Date: Jul 2003 Location: Elko,Nv. Posts: 65	Gas tank If ypu put 19.4 gal. in and drive 200 miles you will be walking the last 34 miles.

07-20-2003, 08:36 PM	#9
SEVEND2 Registered User Join Date: Aug 2001 Location: Menifee, Calif, USA Posts: 2,145	I think my 72 is a 20- 23 gal tank, (behind seat) __________________ With a 1972 Chevy Custom-10 Long bed w/350cid th350, (under-construction). Progress on truck so far (follow link): http://67-72chevytrucks.com/vboard/s...ad.php?t=51051 and stage 2 http://67-72chevytrucks.com/vboard/s...ad.php?t=58132 ~ "Why couldn't you have just put the bunny back in the box?" ~

07-20-2003, 09:00 PM	#10
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	if your trying to figure out gas milage forget about the gauge they are only a rough estimate of fuel usage !!! the only proper way is to fill your tank go X amount of miles then fill the tank up and assuming your speedo and odometer are correct dividing the miles by the gallons will give you the mpg __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

07-20-2003, 09:22 PM	#11
cheatham I need a brake! Join Date: Jul 2002 Location: Nashville, TN Posts: 474	Owners Manual Says: Series and Models Tank Location Gal. C, K10 CABS Back of seat in Cab 20.2 C20, 30 CABS Back of seat in Cab 21.0 C30 FLAT FACE COWL Outside LH side Rail 21.0 P10 FORWARD CONTROL Inside frame behind rear axle 16.8 P20, 30 FORWARD CONT. Outside RH side rail 30.0 C, K10 PANEL, SUB, BLAZER Inside frame behind rear axle 20.5 C, K20 PANEL, SUB, BLAZER Inside frame behind rear axle 23.5 __________________ JP MEMBER OF THE DISCS UP FRONT CLUB 1971 Chevy C10

07-20-2003, 11:19 PM	#13
nroden Registered User Join Date: Jun 2001 Location: Springfield, MO Posts: 1,098	I always figure by the 20.2 in the manual BUT once at BP I put in 22 gal and still had 1/4 of a tank left when i started. I went and argued with the man.. some kind of foreigner. His wife comes into Pamida thinking everything is a dollar... aggrivating. I paid it but never will go back. This is why I always buy from the same Phillips 66 station.... 90% of the time. I trust them. These BP Amacos that are replacing everything around here seem to be chaseing off business. They come in and then before you know it no one is going to them stations. __________________ Nick Rodenberg 72 Cheyenne 10 V8 350/TH350 white/ochre/white/ochre, ochre/saddle interior Retired and in the dry... still runs. I now drive Red '01 Ford Focus... better MPG!!!

07-21-2003, 02:45 AM	#14
ABHaulR Registered User Join Date: Jun 2003 Location: West Valley City, Ut Posts: 311	We have a stock 52 Gallon Tank in our 72' suburban. When gas prices where real high, we'd have to rob the bank before we went to the gas station. The get away sub could drive for 10 hours on a tank of gas though! __________________ 72' GMC Suburban 10 1/2" of Lift, 40" Tires! Waiting for restoration 67' Chevy, What to do??? And Bad Ass American Bulldogs!



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