Check the headlight switch ,my truck I used to have to turn the switch for dimming the lights back and forth to get the dash lights to work . From sitting the contacts corroded on the dimmer contact and spring on the switch.There is a post by Jon G on how to repair ,service the switch.

Last edited by KEVINSKI; 02/02/2022 3:48 PM. Reason: More imfo

1954 Canadian GMC 9300
"The Journey"
Follow in the DITY