I have a 2004 chevy durahmax the fuel gage doesnt work i have ran outta fuel 2x bc when its on 1/4 tank its really empty how do i fix it bc this is getting rediculous

You have a bad fuel level sensor.The fuel tank needs to come out and the sensor replaced.You don`t have to replace the pump assembly.You can get the level sensor separate.I`m not sure if the parts stores have it but I know the dealerships do.Hope this helps.Good luck.

try the multiplug connection on top of the tank

May need new fuel pump assembly has fuel level built onto it. Only way to fix.

02 sensors read the exhaust fumes and then adjust the car's air/fuel ratio by means of the car's computer. IF the gas guage is off, that would be the sending unit in the gas tank that is sticking

bad ground on tank

sokol520--Sounds like fuel pump/fuel guage sending unit. They are integrated and located inside the fuel tank, most likely.

Is......the problem--"the gas gage reads empty when there is fuel in the tank. OR, The gage moves when the key to turned off ?

If it's the first,
You will need to test the gage and through process of elimination, determin if the Sending unit inside the fuel tank has gone Bad.

If its the second ? - Electrical gauges will move when powered down. Normal

Testing the gauge may not be easy - just depends on your ability.
It is a simple 2-wire gauge circuit, when disconnect (usually need the fuel tank) the gage reads in one direction (either full or empty)
then when shorted-the gage reads in oppisite direction.

Of course you must select the correct wires or you may short out the wrong circuits!! Most GM vehicles use a purple wire & black wire.

A quick method I have used to check the in-take part of the gauge is this.
1st. know there is gas - 1/2 tank works best.
2nd driver's door open, key in run position, engine not running.
3rd gently lift up on the door then let if come back down, gently.
just enough to cause the gas to slosh around.
4th - keep an eye on the gas gage, a bad sending unit in the take will show up as a "twitchy" needle.

Of course, if the gage never leaves empty - sloshing won't work.
I have a known good sending unit I can plug into the vehicle and simulate different levels of fuel - if the gas gage works, I know the problem is in the tank.

Let us know.

Dave

It sounds like the fuel level sending unit located on the fuel pump is malfunctioning. The solution for this is to have it replaced. You can do this yourself but I wouldn't recommend it as the vehicle needs to be lifted and the fuel tank needs to be dropped out. This can be preformed for about 100-150 in most shops.

Check for a shorted wire to fuel sender.

Yes it is all one unit, and yes that is what the problem is. don't use aftermarket parts, use OEM, (Delco Remy) they are much better quality.