Checked all the wiring, filled up to full. I originaly thought my tank had been siphoned, but it only took half a tank, which is where the needle was before the gauge dropped.

I checked the wiring all the way to the cluster and checked the resistances across the back of the gauges. It's definitely the sender. Like I said, it's less than 4 years old. Actually I'll check. Replaced 6/10/2003, factory part.

Cali truck with zero rust.

Now I just gotta wait for the tank to run down from full I guess. I'll post back when I find more out.

My Truck: 1987 XtraCab DLX 22R 4WD 5 Speed Manual
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"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." -Jeremy Clarkson