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Fuel pump wiring diagram needed?

Tiny
COLE_TRAIN
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 110,000 MILES
I am replacing both fuel pumps on a vehicle with dual tanks. One of the pumps I am replacing has different colored wires than the instructions that came with the pump list. The wires on the vehicle harness are black, black, blue, and green. I’m not sure how to determine what functions these wires serve.
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Thursday, November 2nd, 2023 AT 9:08 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,380 POSTS
Sure, here are the fuel pump wiring diagrams so you can see how the system works. Check out the images (below). Please let us know if you need anything else to get the problem fixed.
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Thursday, November 2nd, 2023 AT 9:48 AM

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