1966 K10. Discovered an anomaly I can't quite explain. When light knob is off fuel indicates a fuel level - full. When light knob is pulled out, fuel indication goes down some (indicated about 3/4 tank) and is steady. When I use the dimmer switch for the instrument gauge lights the fuel indication moves with the dimmer switch. Curious to me at this point. I am sure someone has some idea as to what is occurring?
Hambone
