BUICK INSTRUMENT CLUSTER GAUGES FUEL LEVEL NOT WORKING

Can I Fix A Bad Gauge Myself Doesn't Work All The Time

My 02 Rendezvous Gas Gauge Not Working It Some How Reads That Has A Full Gas Tank But Somtimes The Needle Just Moves All The Way To Empty.

Just Bought This Car For $500.00. Runs Great But I Notice The Fuel Gauge After Driving 30 Miles Didn't Go Off Of Full. Now 2 Days Later...

Hey Guys! So, I Just Bought The Car Listed Above With Two Problems. First One, Gas Gauge Always Reads Full. Doesn't Go Back And Forth...