The normal causes of an inoperative fuel gauge is the sending unit in the tank. Since the truck is 15+years old you might as well replace the fuel pump when you have the fuel tank removed.
fix the leak
the blower fan is not working in my turck how do i fix it
A 1997 Dodge Ram doesn't have a EGR valve.
its all 1 unit on the top of the gas tank pump and gas gauge costs about 240 at NAPA just prop up the gas tank, loosen the bands and drop it down an easy fix
Well, a blown head gasket isn't cheap at all, no matter the vehicle, but in my experience around $1500
Buy a new truck
how to replace the fuel pression regulator for a dodge ram 2500 1997 van.
the speed sensor.
1997 dodge ram 1500 tried head light switch did not work.head lights and running lights do not work at the same time.
If loose they will need replaced.
Bad heater core? replace Evaporator drain plugged if A/C equipped - try to unplug from under vehicle