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.......

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

Re: 1974 Blazer 4x4 (need info on part)
 

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

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?

Re: 1974 Blazer 4x4 (need info on part)
 

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