Oldsmobile/Buick Repair: olds silhouette 98, fuel level sender, water leak

Question
Fuel gage is stuck on beyond full.  The driver info center also won't read the range.  I just has "E" for the range.  Any suggestions?
Thanks!

Answer
Hi
First thing I would check would be this GM Bulletin -

This condition may be due to water leaking into the interior of the vehicle, and/or spread terminals, at connector C305 that is located on the floor to the rear of the driver's seat. This connector is not sealed from the inside of the vehicle and water may enter the connector causing the terminals to become corroded. Also, the female terminals of the connector may have become spread apart causing an intermittent poor connection.

Correction
Important:  

  •  Inspect the terminals at connector C305 for corrosion or spreading before replacing the fuel module or resistor card kit. Terminals can be accessed from underneath the vehicle.

  •  Do not attempt to repair any spread female terminals as this will result in a return repair. The female terminal must be replaced.

  •  If the terminals show signs of corrosion, determine the source of the water leak first and repair the water leak before repairing the terminals in connector C305.
Repair any corroded and/or spread female terminals in connector C305. Refer to Repairing Connector Terminals in the Wiring Systems sub-section of the appropriate service information.

If no water found, I would test the Fuel level sender circuit.
It MAY be the level sender or the IP Cluster.
The DIC not reading range MAY be related to this.
Does any of the other functions of the DIC work? If so then I would suspect the fuel level problem as the DIC problem.
If no other function of the DIC work, I would suspect the DIC itself.
I Hope this helps
Follow post back, if needed.
Good luck
PAwl