My 1999' gmc sierra fires up but dies immediately and won't stay running no matter what I do! I can feather the gas pedal as much as I want but it will not stay running!!

Asked by Jun 04, 2013 at 09:01 PM about the 1999 GMC Sierra 1500 SL 4WD Extended Cab SB

Question type: Maintenance & Repair

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a large vacuum leak would cause this.

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