Question about 1997 GMC Sierra

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1997 GMC Sierra 1500 6.5 diesel runs for awhile then stalls

The vehicle runs for awhile then stalls. Already changed injection pump. Mechanics/garages cannot figure it out. Manual says might be sticking metering value have no clue where that is. I'm stumped.

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  • nahbexie Mar 01, 2009

    I make a mistake it a 1994 not 1997. Does that make a difference? And yes it does start back up

  • nahbexie Mar 01, 2009

    is the lift pump the fuel pump on 1994 GMC diesel

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These have a problem with a injection pump control. It is a black box on the drivers side of the Injection pump. Either that or maybe a lift pump. When it dies, after it sits a while does it start right back up?

Posted on Mar 01, 2009

  • Clint Smock
    Clint Smock Mar 01, 2009

    Yes the lift pump is the fuel pump, the pump that supplies the fuel to the injection pump. I'm not sure if the 94 has the same injection control box, but if it does it is in the same spot, small black box. Since it starts right up after it sits though, it likely isn't the pump. Check for the Injection pump control box, then repost. Thanks. Good luck.

  • lourie Jan 10, 2013

    just put new injection pump on

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