Cadillac Seville STS Problems

Erratic Fuel Gauge Operation on Cadillac Seville STS

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.

(30 people reported this problem)

Cadillac Seville STS Vehicles With This Problem

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Average mileage: 126,253 (70,000–199,000)
8 model years affected: 1990, 1995, 1997, 1999, more2000, 2001, 2002, 2003
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Viewing 1-11 of 11 comments
When the fuel level gets low, such as quarter tank, it jumps around and goes to three quarters not reliable have to keep full
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.
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.
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.