GUAGE GOES TO EMPTY EVERY TIME TANK IS FILLED. MAY SHORTLY GO TO FULL OR STOP ANYWHERE IN BETWEEN. IS ACCURATE MOST OF TIME, BUT CAN FLOP AROUND UNDER ANY CIRCUMSTANCE.
Chevrolet Q&AAsk Your Question
1999 Chevrolet Silverado 1500 Question: WHAT IS CAUSE OF ERRATIC FUEL GUAGE?
Answer #1Greg's Orange Auto (11856 Answers) , Orange, CA - (714) 361-9386globalhelper February 02, 2012, 12:53Master
YOUR SENDING UNIT IS MALFUNCTIONING. IN THE TANK YOU HAVE A FUEL PUMP AND A SENDING UNIT I REC YOU CHANGE BOTH AT THE SAME TIME
Answer #2ttcurtis February 03, 2012, 00:47Enthusiast
FUEL PUMP OR FUEL REGULER
vraig November 19, 2012, 17:53Rookie
connector on fuel pump sending side,will eventually lead to fuel pump failure.GM is aware but does't care.New after market pump will have updated connector and works perfect.