I have a 2003 avalanche 8.1 fuel indicator q uit. no check engine lights. has 2 tanks 1 fill pipe. what where is level indicator located.

RTM ,. read the shop manual first.? its all there to read 24/7.
Is this car A USA CAR?

generic.

1. drain tank fully, or you will get a flood of fuel on YOU.
2. remove all hoses to tank/vents and wires, to pump rack top,.
3. remove filler neck hose to tank.
4. with a floor jack under tank, and wood protector to it, try to raise tank just a tad. (1/2?") (I have car at rear on jack stands first)
5. remove tank straps. now.
6. lower jack, done.

now out of shop manual quoted SX4 , near.

1) Relieve fuel pressure in fuel feed line according to
"Fuel Pressure Relief Procedure".
2) Disconnect negative cable at battery.
3) Remove fuel filler cap.
4) Insert hose of a hand operated pump into fuel filler
hose (1) and drain fuel in space "A" as shown in
figure.(this car has check valve at tank inlet)
Hoist vehicle, and remove clamp (2), fuel filler hose
(1) and breather hose (3) from fuel filler neck.
6) Remove exhaust center pipe referring to "Exhaust
Pipe and Muffler Removal and Installation in Section
1K".
7) Remove propeller shaft (For 4WD model) referring to
"Propeller Shaft Assembly Removal and Installation
in Section 3D".
8) Due to absence of fuel tank drain plug, drain fuel
tank by pumping fuel out through fuel tank filler.
Use hand operated pump device to drain fuel tank.
Disconnect quick joint (fuel pipe) (1) from fuel pipes
(2) referring to "Fuel Hose Disconnecting and
Reconnecting".
10) Support fuel tank (1) with jack (2) and remove its
mounting bolts (3)
Lower fuel tank a little as to disconnect wire harness
at connector (1)and ground wire (2), then remove
fuel tank

The pump is in the gas tank, so the tank has to come out.

First of all, there is a recall for gas tank replacement for your vehicle. The dealer will replace it free. The link will get you to the document in PDF form
Redirect Notice
It looks like there is a bracket on one end of the tank hidden by a heat shield

FUEL SUPPLY SYSTEM Fits Buick Rendezvous

1) you might want to check the fuel filler tube to see if there any rust, resulting in fuel leaking out whenever you filled the tank.
2) check the fuel tank fill-up hose (sill hose) might have a hole- causing fuel leak when filling up the gas tank.
3) you might want to contact your dealer, there was a recall regarding the tank filler pipe and cap problems.

your fuel level sending unit in the gas tank is probably bad. mine has gotton so bad i have to use the odometer and just fill my gas tank every 240 miles. i just found a kit to replace the problem sending unit on e-bay for $38 so i am gonna give it a try.

FUEL LEVEL SENDING UNIT INSIDE FUEL TANK COULD BE BROKEN.

You need a new fuel level sensor. It's located inside the fuel tank and is part of the fuel pump. The fuel tank has to be removed to fix this. Sorry but I hope this helped.

code p 0440 refers to the EVAP system --purge valve malfunction
check wiring and replace the purge valve

the guage on the dash should not be bad it is more than likely the sending unit in the tank you will have to drop the tank and replace the pump. befor tearing anything down make sure the pump is plugged up and that it has a good ground.

What this sounds like is the sending unit in the tank needs to be replaced. Call the dealerships around your area to get an idea on price. I think the gas tank has to come down.