Question about 1994 GMC Sierra
See if you can pull the codes for vehicle ,,but it sounds like a idle air control valve,iac,,,or sometimes trottle position sensor,,,most the time you can take iac off clean part and trottle body
Posted on Aug 30, 2010
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Posted on Jan 02, 2017
i would check the dist.cap and wires.this seems to be a place to start.check all vacum lines.would also check fuel pump pressure.you need to determine if its fuel or elect.may also consider cam sensor.
Posted on Dec 09, 2009
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