1997 chevy silverado 1500 no power to fuel pump.
CHECK FUSES, ALSO LOOK @ RELAY, IT MIGHT HAVE ITS OWN FUSE, NEXT TO IT. POWER COMES FROM BATTERY THRU IGNITION SWITCH, TO RELAY. THEN TO PUMP. THE MOST OVERLOOKED PART OF THIS CIRCUIT IS GROUNDING !!! WHY DOES EVERYBODY IGNORE THE GROUNDS ? WITHOUT IT YOU GOT NOTHING ! NO POWER ! RE-ESTABLISH GROUND STRAP FROM PUMP HOUSING @ TANK TO THE FRAME. EVEN IF THE GROUNDS LOOK OK, THEY SHOULD BE REPLACED. EVEN @ YOUR ENGINE, ALTERNATOR, ETC., THE GROUND RETURNS THE POWER TO THE BATTERY & BACK THRU THE CIRCUIT, COMPLETES THE CYCLE, SIMPLE, EASY, COULD BE YOUR ISSUE ! INSPECT ALL WIRES ALONG FRAME FROM PUMP TO FRONT OF TRUCK, FOR DAMAGE, CORROSION, ETC., ON A LOT OF VEHICLES THE WIRE HARNESS THAT CONNECTS THE PUMP TO MAIN HARNESS GOES BAD CAUSE OF ITS REAR LOCATION, SALT, DEBRIS, ETC., HOPE THIS INFO HELPS YOUR PROBLEM !
replaced O2 and it came back. No exhaust leaks and no vacuum leaks
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