Check Gage Light

Guage doesnt matter if its fuel. Select the odometer reset button and switch to miles. Every time you fill it reset miles driven to zero. Then drive 300 miles approx and fill it again. Truck drives about 340 or so on a full tank so just fill it every 300 and reset. I have been doing this for five years without problem.

The fuel level sending unit in the tank is probably going bad.

well is it telling me I am out of gas? if so how far can I go?

Fill it And u can go 300 miles. Reset odometer to zero when u fill. Rinse repeat. Until such time as u can afford to fix the fuel sending unit. For me it has been on my todo list for 5 years and nearly 40,000 miles. Other things such as full coolant flush. New hoses and thermostat. You know things of importance keep taking precedence. If you go sometimes 325 miles it will still make it. I just set the safe zone around 300 miles so I never run out. Longest I have gone is 340 and made it ok on full tank. But that was a nail biter

I agree the easiest work around is to rest the trip odometer, this is how I keep my need for gas on my motorcycle. It has no fuel gauge. If you want tru to fix it look at dash instrument panel “ anti slosh model” replacement or hack to by pass on you tube, or get another module from a junkyard. But dash instrument panel removal is not hard, just time consuming.good luck.