Question about 2003 Pontiac Montana
Hi! This can be caused by a faulty PCM (powertrain control module). The PCM has connectivity on all electrical current that runs inside the car which includes the engine, transmission, accessories, etc... As a first course of action please swap the PCM. Hope this helps and thank you for using FixYa!
Posted on Nov 07, 2010
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Posted on Jan 02, 2017
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