Question about 1999 GMC Suburban
Hi! Looks pretty much a PCM (powertrain control module) failure. The PCM is like a car's brain that when it fails everything else's fail. As a first course of action I strongly suggest that you have the PCM resetted on the dealership but if ever that the PCM is faulty this will require replacement. Hope this helps and thank you for using FixYa!
Posted on Aug 24, 2010
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Posted on Jan 02, 2017
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