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quick question about MU1613

Discussion in 'Chevy Trucks' started by obrut, Mar 6, 2008.

  1. obrut

    obrut Senior Member
    from IL
    Messages: 149

    Got my fuel pump today for my 2000 NBS GMC 2500 6.0L and the sold me part number MU1613. I lifted the bed and my old pump has one square 4 pin connector on it and the new one has one 4 pin flat connector and one 3 pin flat connector. The 3 pin goes to a black sensor on top of the unit. The pump came with a new 4 pin flat connector but what about the black sensor, do i have the wrong pump?
  2. obrut

    obrut Senior Member
    from IL
    Messages: 149

    just got off the phone with the dealer and he said I should have MU1614, is the difference the black sensor?

    I called delco direct and they told me the MU1613 is for a 5.3L and MU1614 is for the 6.0L either way I wont be able to finish it tonight. I'm going to return the mu1613 tomorrow and get the mu1614. One other question, do I need a special tool to remove the fuel lines?

    Last edited: Mar 6, 2008
  3. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    The 1614 SHOULD be the correct one for your 6.0.
    GM did a lot of strange things during the body style changeover (especially on the 2500's) but it should be the correct one.

    You will need a fuel line disconnect tool to remove the lines from the fuel module assembly. You can buy inexpensive ones ($10 or so) at most parts store that will do the job.
  4. basher

    basher PlowSite Fanatic
    from 19707
    Messages: 8,993

    GM loves the running line change. They also forget to tell anybody, including their own people.
  5. ahoron

    ahoron Senior Member
    from here
    Messages: 422

    there are 2 different fuel pumps for that truck one with one plug Wiring code tuc and with two plugs code tcf. They are the same for the 4.8l 5.3l 6.0l 99-03. MU 1613 replaced Mu1516. You should be able to disconnect fuel lines with needle nose pliers. I would replace the wiring harness connector to the pump while you have it apart because they tend to get corroded.
  6. obrut

    obrut Senior Member
    from IL
    Messages: 149

    thanks guys, I should be able to get the new pump today and hopefully get it in tonight.