Oldsmobile/Buick Repair: 98 Olds Siera gas gauge, oil pressure sending unit, toyota technician


Question
I am a retired Toyota technician who does basic maintenance for friends and family. I still have my ASE's, but have been out of the field for three years.
I have a '98 Olds Siera that was towed to me with a bad Oil Pressure Senser.  After making the repair and verifying the fix, I noticed that the fuel gauge needle had somehow gotten below the pin located under the "E".  As it was fine before, I feel that I need to fix this.  However I would like to avoid dismantling the dash if at all possible.
The full history of the repair is that on a long trip, the oil pressure sending unit failed and started leaking out through the sensor itself.  As the engine was hemmoraging oil, I towed it in on a trailer.  To make the repair, the battery was removed and charged, the sensor was R&R 'ed, and the battery reinstalled.  The fluids were checked and the car started.
I am at a total loss as to how the gauge got screwed up and my experierence with gauges is limited; therefore I'm not even sure as to how to fix it.
Do you have any ideas on where I could start?

Answer
Hello Kristan,
If you didn't have the instrument cluster out or opened up, then I sincerely doubt that you had anything to do with the fuel gauge.
But replacing it would probably be the easiest fix.
Some clusters have a lense that covers the gauges, which can be removed to replace the gauges.
If you can remove that, and with a little hook under the needle, pull it over the pin, it should work correctly.

Van