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mike 9/14/2011

1995 GMC W3500 Forward W3S042 8 Cyl 5.7L


why dose my 1995 gmc vandura 3500 go into default mode when idle speed drops real low ?

166000 warm stopped once in a while off and on 1 year ago when this happens the check engine light comes on and auto trans shifts with a bang will return to normal after turning engine off waiting about 1 minute and then restarting.

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