no power to fuel pump
It does not have one per se - It has a Fuel Pump relay controled by the ECM "B" fuse and the ECM/PCM itself. The relay is in the underhood relay box. 30 will be hot all the time 85 is your key. It will become hot for 3 seconds when the key is initially put on. It will stay alive when the key is in the run or on positionb if the ECM/PCM is working correctly. If everything there is okay then its a ground problem at G102 or G402 or Wiring issue to the pump Good Luck
I need to know what the box above the fuel filter is under the chassie that has wires coming from a switch looking box I guess that's what you'd call it...it's square
it is a 1993 gmc sonoma..it'll start then die out then won't satrt for awhile then do nthe same thing over again
Found out it is a box that contolls the air bags and also has an a b c d wires so it is the box that went bad..thanks anyway
Looking for a Used Sonoma in your area?CarGurus has 630 nationwide Sonoma listings starting at $2,995.
Search GMC Sonoma Questions
GMC Sonoma Experts