GAS GAUGE SHOWS EMPTY

Sending unit is inside the tank. First, check that if you ground the signal wire near the tank then the gauge rises. If so, you must pull the unit from the tank.

Could be faulty connection at the Tank or at worst you have to replace your sensor that goes into the tank

Common issue for Rendezvous is a faulty fuel sending unit, sometimes referred to as a fuel module (fuel pump, pump filter, float, sending unit, all sold together as a preassembled unit). Go to your local auto parts store. Most have a scanner/code reader that they can connect to your vehicle to download any fault codes.

hi,

sounds like the sending unit rheostat(sending unit) has a bad contact or break in the resistance wire. inside the tank theres a float attached to an arm that goes to a small rheostat, like a volume control on a stereo. the rheostat is sending a scratchy signal or no signal to the computer and your getting these readings. that part is inside the gas tank, the part usually comes integrated with the fuel pump. the gas tank has to be lowered to fix it.

jm

That definitely sounds wierd, sounds like the wires are backwards on the float assy.

Your fuel gauge sending unit is bad. Common on this model GM cars. The sending unit is in the gas tank and is part of the fuel pump assembly. Sulphur in the gasoline eats away at the contact points in the sending unit which causes it to fluctuate. Unless you are daring, this is NOT a job for a do-it-yourselfer... You may have to drop the gas tank to get at the fuel pump...Some models have an access plate in the back seat/trunk area that you can lift the fuel pump out of.
Good Luck and BE CAREFUL...... gasoline is dangerous...

no the flotter need to be replace and for that you first check under the back sit if you can access the fuel pump throu there if not the fuel tank need to be dropped

your gauge is part of the integrated unit in the fuel pump module

It needs to be re-gassed. Take the car to an Auto Mechanic to get the Air-Conditioning re-gassed. They might also need to check it for leaks to make sure the gas stays in.

Well that tells me that someone installed the wrong fuel level sensor. Your going to have to drop the tank and pull the pump and float assymbly out. Then go to a parts store and get a sending unit that has the opposite resistance of that sending unit. Just wait until the tank is empty so its a lot lighter. You can call the parts store or go down and see if there is multiple sending units. The sending units work by resistance, when the tank is full the float moves up and turns a wheel in the sending unit, which either removes or increases the resistance causing the gauge to lower. The sending units either give full resistance at full or no resistance at full and then changes as the level goes down until it does the opposite at empty.