1999 buick park avenue, having trouble with pumping gas in the tank. The gas nozzle keeps cutting off as if the tank is full,so we can only get a few gallon at a time. Need to know about the vent to the gas tank or in the gas tank. Car has recently had a new fuel filter installed. Any tips.

You will have to have someone get under the car to find out where the leak is coming from. It could be the gasket for the fuel pump on top of the tank, the rollover valve, the vent, or the filler hose going to the fill pipe.

Usually a sign of a blockage in the vent pipe inside the filler tube, or the vent for the gas tank. Air pressure inside the tank has to be equalized as the fuel is added.

Sending unit is bad. but as said check the wiring first. sending units in chrysler vehicles are part of the whole pump unit that is inside the tank. The whole assembly must be replaced. The unit does not cost too much, but the labor can be intensive...Good Luck

You may be right. the float (sending unit) may be bad . i would also check the connections to sending unit and pump. this is located at rear top area of the gas tank.


the last thing that i have seen is the baffle inside the tank breaks free and moves around in tank banging into sending unit (float). when you remove the sender and pump form tank stick your hand into hole and make sure baffle does not move. if it does then tank must be replaced.


There is a ground to the frame in the rear area of the tank. i would look at that also. if you follow black wire from connector you will see it go to frame or to be specfic the unibody. i dont think it would be that but just make sure. if it were to be that wire you would have fuel problems but who knows for sure there sometimes two grounds, one for pump and one for sender. good day.

park avenue if you have 2000 or 2001 model you can remove fuel pump from the trunk area remove spare tire and jack trunk lining then remove fuel pump cover and fuel pump.

Fuel pump,a possible

Disconnect the filler tube and overflow hoses from the tank. Place a floor jack under the fuel tank. Unbolt the 2 straps holding the tank to the body. Lower the gas tank some, disconnect the 3 fuel lines and electrical connector from the tank. Lower the tank down, remove the lock ring that retains the fuel pump in the tank. It may help with installing the tank, to drain the gas from the tank.

Yes, the fuel pump is in the fuel tank and it will look like this...

the fuel pump is in the gas tank. If you hear a faint hum from the tank when you turn the key on then it is working

try pulling back a little on the nozzle, the tank has an anti rolloverball in the pipe and this sometimes cause it to shut off when the nozzle is stuck all the way into the filler pipe