[Copper116]

I have a 4x4 1972 K5 Blazer with a 4 speed manual trans.
I've been working on for some time... it's drive-able but still having problems with the fuel gauge. It was reading a 1/4 tank only... so with tips from other members here, I dropped the tank, replaced the sending unit, reinstalled it and connected the wires properly making sure the ground wire was clean and tight. The gauge then went to 1/4 tank again.... upon advice, I swapped the resistor on the rear of the gas gauge and it worked for a few days... then went to full tank and stays there. I'm not sure what to do now... >>frustrating<<