Seville SLS

Erratic Fuel Gauge Operation on Cadillac Seville SLS

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 126,486 (68,000–175,000)
6 model years affected: 1999, 2000, 2001, 2002, more2003, 2004
23 people reported this problem
Viewing 1 - 9 of 9 comments
Fuel level starts to wander after fuel indicator reaches about 1/4 fuel left in tank.
Not fixed yet. Add fuel by watching mileage.
When the fuel gauge falls below one-half tank, the gauge begins reading incorrectly...showing everything from a full tank to half tank.
I've had this issue for almost a year. But now the gauge will flop back and forth between full and empty.
Gas gauge doesnt read right
The fuel gauge fluctuates wildly, though it rarely indicates a level below half a tank of fuel. At initial start up it appears to indicate an accurate fuel level but I'm still doubtful of its accuracy. The fuel used indicator seems to be more accurate for estimating what fuel level actually is
Erratic fuel gauge operation
Fuel gauge not reading properly, fluxing back and forth. Diagnosing.