1974 Blazer 4x4 (need info on part) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1968ratrod · 02-13-2010, 09:47 PM

I have a 74 Blazer and the fuel sending unit is bad and I can't seem to find the info that I need to get the correct one. It shows that there is 2 options one being 25 gal. and the other being a 31 gal. tank. I dropped the tank and pulled the sender out but the only marks seem to be 113 4 on the electrical part of the sender down in the tank. How do I know for sure what size tank that I have for sure. Any ideas ? Thanks in advance.......

FLEET72 · 02-13-2010, 10:53 PM

Try this:

Oreilly Auto

Fuel Tank: 31 Gallon Tank; Tank Dimensions: 28-3/4 Inch X 28-1/8 Inch X 12-3/4 Inch
Fuel Tank: 25 Gallon Tank; Tank Dimensions: 28-3/4 Inch X 28-1/8 Inch X 10-3/4 Inch

1968ratrod · 02-13-2010, 11:48 PM

Thanks- I'll measure mine and see what I come up with.......

russgt · 02-14-2010, 09:42 AM

An old trick but a pain in the butt would be to fill it up and measure how much it took, but then you would have to empty it before install. My 76 has the option in the glovebox for the 31 gallon tank, NK7, does yours say anything?

1968ratrod · 02-14-2010, 10:32 AM

Not sure - I'll check. Thanks!!!!!!!!!

02-13-2010, 09:47 PM	#1
1968ratrod Registered User Join Date: Oct 2009 Location: Lufkin Texas Posts: 171	1974 Blazer 4x4 (need info on part) I have a 74 Blazer and the fuel sending unit is bad and I can't seem to find the info that I need to get the correct one. It shows that there is 2 options one being 25 gal. and the other being a 31 gal. tank. I dropped the tank and pulled the sender out but the only marks seem to be 113 4 on the electrical part of the sender down in the tank. How do I know for sure what size tank that I have for sure. Any ideas ? Thanks in advance....... __________________ 1965 Chevy Suburban 2003 Chevrolet S10 2011 Harley Streetglide

02-13-2010, 10:53 PM	#2
FLEET72 Registered User Join Date: Jan 2007 Location: Sonoma, CA Posts: 521	Re: 1974 Blazer 4x4 (need info on part) Try this: Oreilly Auto Fuel Tank: 31 Gallon Tank; Tank Dimensions: 28-3/4 Inch X 28-1/8 Inch X 12-3/4 Inch Fuel Tank: 25 Gallon Tank; Tank Dimensions: 28-3/4 Inch X 28-1/8 Inch X 10-3/4 Inch __________________ Oscar '72 Shortbed Fleetside '95 Jimmy 4X4 '69 GMC Custom Camper Last edited by FLEET72; 02-13-2010 at 10:55 PM. Reason: add link

02-13-2010, 11:48 PM	#3
1968ratrod Registered User Join Date: Oct 2009 Location: Lufkin Texas Posts: 171	Re: 1974 Blazer 4x4 (need info on part) Thanks- I'll measure mine and see what I come up with....... __________________ 1965 Chevy Suburban 2003 Chevrolet S10 2011 Harley Streetglide

02-14-2010, 09:42 AM	#4
russgt Registered User Join Date: May 2008 Location: Waukesha, WI Posts: 904	Re: 1974 Blazer 4x4 (need info on part) An old trick but a pain in the butt would be to fill it up and measure how much it took, but then you would have to empty it before install. My 76 has the option in the glovebox for the 31 gallon tank, NK7, does yours say anything? __________________ 70 stepside 76 blazer 86 Silverado 20 Max Trailering 6.2 Crew 71 Nova SS My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=363634

02-14-2010, 10:32 AM	#5
1968ratrod Registered User Join Date: Oct 2009 Location: Lufkin Texas Posts: 171	Re: 1974 Blazer 4x4 (need info on part) Not sure - I'll check. Thanks!!!!!!!!! __________________ 1965 Chevy Suburban 2003 Chevrolet S10 2011 Harley Streetglide

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