Mechanics

GMC YUKON ENGINE PROBLEM

1999 GMC Yukon • 17,000 miles

My 99 Yukon will not start after cranking.I do not hear the humming of the pump when I turn the key.I have replaced the pump relay but no start
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November 24, 2012.




Make sure the fuel pressure is within spec and check for a hot blue snapping spark to the plugs. One will be missing. NOTE: Even though you hear the fuel pump. It may not be producing enough pressure to run the engine.



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