It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.Google+
Car Problem Reports
Cadillac Seville STS Fuel Level Sensor Failure
Cadillac Seville STS Problem
Average Mileage: 126,563 mi (70,000 mi - 199,000 mi)
Visitor, 2000 Cadillac Seville STS, 109,000 mi
When the actual fuel level is just below 1/4 tank the guage will float to full and stay until the car is shut off.
Visitor, 2003 Cadillac Seville STS, 79,000 mi
When the fuel level gets low, such as quarter tank, it jumps around and goes to three quarters not reliable have to keep full
Visitor, 1990 Cadillac Seville STS, 70,000 mi
Fuel guage showed irradic readings. Replaced the sensor to resolve the issue.
Visitor, 1997 Cadillac Seville STS, 161,032 mi
Gas gauge reads full even when it is almost empty. Once I fill the the tank the gauge is up and down until it settles to full.
Visitor, 2003 Cadillac Seville STS, 94,450 mi
Gauage goes up and down, then flat empty. Had to call AAA for gas!
Visitor, 2002 Cadillac Seville STS, 199,000 mi
Fuel tank level fluctuates up and down while driving
When level is quarter full readings are erratic,not reliable
Visitor, 1997 Cadillac Seville STS
engine shut down, reads full, towed to shop. Low pressure, added gas. pressure up & started right up, bad fule sensor.
replaced complete fule pump modual to fix.
Fuel level is always wrong. Sometimes it shoots to full, then immediately drops to E.