Hey guys, I have a 95 Chevy K1500, the gas gauge has a mind of its own. I can't tell how much gas I ever have. It use to act up just when it got low and now it's acting up all the time even when it's completely full and the tank won't hold any more gas the gauge still shows that it's a quarter from being completely full. It's driving me crazy. I've been told it could be 2 things. Either the sending unit in the gas tank or the dash gauges themselves. I can't afford to fix both, is there some way I can test the system to figure out for sure which one it is???