How accurate is the fuel level sending unit

[Flyfishing]

On 3rd gen trucks with the stock OEM intank fuel lift pumps/fuel level sending unit, how accurate, according to the fuel gauge, is the fuel level sending unit when the fuel level is low, say 1/4 tank or lower?

I would consider 5 to 7 gallons remaining in the tank and the gauge reading E to be pretty good. Are the newer truck fuel gauges reading this close?



Thanks, Richard

 

[moonranch]

When I installed the vent kit on my truck, I ran the truck 90 miles (~5gal)after the needle was on E, and there was still about 1. 5 gal in the tank.

 

[mhachez]

If I fill my truck shortly after the low fuel light comes on,it'll take 26 gallons. The most I ever put in was 32 and the gauge was below E by the width of the needle. Mike

 

[jltcasper3]

i have ran mine low before and have mnaged to put 36 gallons in my 35 gallon tank, with it filled all the up the filler neck.

 

[JimB1]

Think I read this on the GDP website, if you've not done the vent kit and/or have any suspicion of crud at bottom of tank... , always stay above 1/4 tank 'cuz the lift pump in tank bowl/baffle assy refills over its' top edge to get to lift pump. Below 1/4 tank and that same assy lifts fuel directly off bottom of tank via one way rubber flapper type valve. Check out their website for much more detailed info.

 

[Turbo_Bob]

When the warning light comes on you have a solid 4 gallons. I have gone 90 miles many times once that light comes on. Just know what your MPG is and beware of headwinds and towing.

 

[donnier]

I agree with not running it lower than 1/4 tank.

Better safe than sorry.