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Im working on a gmc 3500 fuel pump the wireing harness is differnt please help asap its raining and dark with lights please talk to me its a box truck colors are all differnt then then the original wire harness to power the fuel pump new harness says d3ca..Please help ASAP

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2 Answers

The wire colors are not the issue

The wires should be exactly were they
are on the old pump & the connector
& you should be able to just plug it in
to the vehicle harness,as you unplugged
the old one, or you have the wrong pump
assy

Posted on Jan 12, 2013

  • 2 more comments 
  • jason rosario Jan 12, 2013

    The replacement pump came with a differnt style connection. For the electric

  • jason rosario Jan 12, 2013

    The small one on the left is the.origanal one the bigger one one the rite came with the replacement pump....

  • jason rosario Jan 12, 2013

    The small one on the left is the.origanal one the bigger one one the rite came with the replacement pump....

  • jason rosario Jan 12, 2013

    The small one on the left is the.origanal one the bigger one one the rite came with the replacement pump....im trying to send you a pic but not sure how on here

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You should be able to disconnect the fuel pump at the harness plug above the tank (under the cab, above the frame) and then reconnect the new pump.

Posted on Jan 12, 2013

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