Bought a 94 12v 3500 today. Fuel gauge showed close to empty so i filled it up. It took 6 gallons and was full. The gauge showed full and the fuel was up the filler neck. Any ideas on why 6 gallons goes from empty to full? Its got a 35gal tank.

 

Yeah, sender worn out. Some say easier to pull off bed, I just dropped the tank.

You should be able to run about 500 miles to get the fuel level down under 5 gallons then release the fill neck and overflow hose, two tank strap bolts and tilt to release fuel line connections. a floor jack and 18" 2x12 works nicely....

Welcome to the dtr.

 

I appreciate it. Ill give that a shot when I get some of the fuel out of it. Thanks

 

Or you could just ignore it and run off your Odo for years like I have...........

One of these days I gotta get that tank dropped.............

 

How many miles do you usally get on a tank? I tow a good bit so I wont get great mileage but my truck also has the 5spd in it

 

I never run it below 1/4, so I'm not sure, but at 1/4 I'm adding about 25 gal to fill it, which means about 11 gal still in there...and when I fill it I run it up the neck, so maybe more than 36 gallons...

 

Don't forget to order a filler neck tank seal when u order the sending unit. Mine ripped apart when I dropped the tank, which delayed the reassembly. Seal was about. $8. Extra

 

I average about 17 in mixed driving, so I am not your best guy to ask.

If I were towing I would assume around 14 MPG and use 28 gallons, or about 400 miles from full.