I have an '04 LeSabre custom. The gas gage is housed in the instrument cluster along with the speedometer and a separate temp gage. The fuel gage is at o’clock TOP of about a 4" circle by itself. Empty is at 10:00 o’clock and full is at about 2:00 o’clock. For the last three FILLups, the pointer has…

These Vehicles Do Have Some History With Fuel Level Sensor Problems (In-Tank Sending Unit On Fuel Pump Module). Sulfur in the gasoline reacts with and erodes the “wiper” (tiny wires) on the sensor arm. This does cause the gauge to go whacko, but I’ve not heard of one going whacko with the indicato…

If you can get to the wiring behind the instrument panel, you can check the voltage (or resistance, I’m not sure which) on the wire from the fuel sending unit. You will need the manual to know the exact reading. If the reading when full is correct, then the problem is the gauge. If the reading is…

Buick LeSabre fuel gage has gone whacko

Maintenance/Repairs

Cougar September 8, 2011, 5:14pm 4

Most fuel gauge problems are caused by a problem with the wiring to the sender or the sender itself, not the gauge. You should be able to verify the problem by removing the wire from the gauge at the sender connection and tie a variable resistance to it. By changing the resistance the gauge should move accordingly.

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Buick LeSabre fuel gage has gone whacko

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