Originally Posted by
martysmartie
Almost certain to be sender unit I would say, I would think it's jammed at the 3/4 mark, the fact the gauge shows a reading shows the circuit to be complete that is presuming the gauge needle hasn't simply jammed guessed you have tried tapping the gauge?
Martin
That's what I'd go with, is the car new to you ?, if so may have been bent, sender unit arm if sender unit been taken out sometime, but it's better to show less fuel in tank than there really is, at least you're not going to run out that way, rather than the other way around.
I don't know about your model, but on early sierra's the actual gauges, temp and fuel had a mechanical adjustment on them, where you could physically adjust the needles position.
tabetha