Yukon 5.3 no start B2973

Discussion in 'Engine & Drivetrain' started by diLucca, Apr 27, 2018.

  1. diLucca

    diLucca TYF Newbie

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    Hi,
    My problem is sometimes my Yukon(2000 NBS) will not start, it will cranking, but no start.
    On carbon cleaner or on alternative fuel(propane/LPG) will start. so there is spark.

    When I turn key on, no sound coming from fuel pump. But when working it working great.

    I found DTC in BCM B2973, does it have something to do with theft system, like cut out fuel pump?
    Is bad some microswitch in door lock, or bad ignition collumn assy?

    Thanks in advance.
     
  2. Doubeleive

    Doubeleive Elite Member Supporting Member

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    the code is drivers door lock, probably not related to your problem, your fuel pump should work everytime, how many miles/kilometer? these fuel pump are made for about 100k miles then they can get unreliable., if you change the pump use a oem replacement they run about $125-150 USD online. plus shipping to your country.
     
  3. diLucca

    diLucca TYF Newbie

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    Thanks, that what I want to known. Because googling B2973 show almost nothing.

    What makes me angry is that it is intermittent(other day i plan to check connections and it starts right, so no checking)
    And when it works no signs of bad fuel pump. Also pump was done with previous owner a 4years ago(cca 30 000miles).

    On parts i can only rely on rockauto(reasonable shipping to europe).
    Will be Airtex OK? Or rather Delphi?
     
  4. HiHoeSilver

    HiHoeSilver Away! Supporting Member

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    With the amount of work it is to change it, I would only buy the AC Delco.
     
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  5. diLucca

    diLucca TYF Newbie

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    Now after day, also no start, relay was switching.
    Little bounce with hammer to the tank and start running, so 90% it is bad fuel pump?

    Suck som fuel to my bimmer kompaktwagen :-D To be able done that fuel pump :)
     
  6. swathdiver

    swathdiver Full Access Member

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    A bimmer kompaktwagen? I'd rather have a henschel panzerkampfwagen ausfuhrung H1! :)
     
  7. diLucca

    diLucca TYF Newbie

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    My financial situation is little bad, but H1(not Hyundai) is on the list :)

    Kompaktwagen is E36 316i compact, with LSD mod.
     
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  8. diLucca

    diLucca TYF Newbie

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    OK. New pump(delphi). Cleaned tank, new fuel filter(Mann). And got lean codes on both banks(when hot on idle) after 3day of driving.

    This gmc has problem after problem :-(
     

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