Gas Tank Size? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tink · 09-10-2003, 06:31 PM

I've got a 76 Cheyanne. When I took apart the dash, somehow the gas guage got screwed up. I know I get about 10mpg but need to know how big the gas tank is to know how many miles I can safely go on a tank... So, how do I tell what size the gas tank is (other than running it to empty)?

bagged78 · 09-10-2003, 06:54 PM

Well you have two choices,
1. 25 gallon
2. 31 gallon
I have each one, and the only differance that I can see is when looking at the tank from the rear of the Blazer the 25 gal. seems to be level ( by level I meen from the flat piece that sticks out from the middle of the tank down to the bottom) and the 31 gal. seems to have a slight taper.. That may or may not be acurate but it is what I can see, and ever one that sells gas tanks lists them as 25 and 31 gallon tanks, and no other options..
Hope this helps, I guess you could assume that your tank is only 25 gallons and if you have a 31 gallon you would be safe....

bagged74 · 09-10-2003, 10:28 PM

I beleive that is an accurate description in the difference. You could also just run it low and fill up, and see how much it holds.

CRRoy71 · 09-16-2003, 10:26 AM

So, would this one be a 31. My sticker in the glove box says that it has the 31 gal, but I have let it get pretty low and I have never put more than about 25 gal in it. Maybe my gauge is a little off?

CRRoy71 · 09-18-2003, 10:31 AM

any ideas?

09-10-2003, 06:31 PM	#1
Tink Registered User Join Date: May 2002 Location: VA Posts: 1,337	Gas Tank Size? I've got a 76 Cheyanne. When I took apart the dash, somehow the gas guage got screwed up. I know I get about 10mpg but need to know how big the gas tank is to know how many miles I can safely go on a tank... So, how do I tell what size the gas tank is (other than running it to empty)? __________________ 69 Chevy C10 88 Sierra 02 2500 Suburban And too many S10s to list!

09-10-2003, 06:54 PM	#2
bagged78 world class smart ass! Join Date: Jan 2003 Location: Clinton Utah Posts: 335	Well you have two choices, 1. 25 gallon 2. 31 gallon I have each one, and the only differance that I can see is when looking at the tank from the rear of the Blazer the 25 gal. seems to be level ( by level I meen from the flat piece that sticks out from the middle of the tank down to the bottom) and the 31 gal. seems to have a slight taper.. That may or may not be acurate but it is what I can see, and ever one that sells gas tanks lists them as 25 and 31 gallon tanks, and no other options.. Hope this helps, I guess you could assume that your tank is only 25 gallons and if you have a 31 gallon you would be safe.... __________________ Aric 75 2WD BLAZER (never ending project) -some day maybe- 02 2500HD CREW CAB 4X (daily drive) -8" lift 37s and 22s- ____ ____________________________

09-16-2003, 10:26 AM	#4
CRRoy71 Registered User Join Date: Feb 2003 Location: Mont Belvieu, TX Posts: 852	So, would this one be a 31. My sticker in the glove box says that it has the 31 gal, but I have let it get pretty low and I have never put more than about 25 gal in it. Maybe my gauge is a little off? Attached Images __________________ Chris '92 ext. cab s/b 4.3L "Sparky" '04 crew cab 2500 4x4 6.0L

09-18-2003, 10:31 AM	#5
CRRoy71 Registered User Join Date: Feb 2003 Location: Mont Belvieu, TX Posts: 852	any ideas? __________________ Chris '92 ext. cab s/b 4.3L "Sparky" '04 crew cab 2500 4x4 6.0L

09-10-2003, 10:28 PM	#3
bagged74 its just $$$$$ Join Date: Jul 2003 Location: OK Posts: 2,078	I beleive that is an accurate description in the difference. You could also just run it low and fill up, and see how much it holds.



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