Question about 2006 GMC Sierra 1500HD
Check the battery terminals first to make sure they are tightened and not corroded, if you have a way to check the battery that would be good [ you may have a voltage gauge on the dash, when you first turn on the key it should register at least 12 volts, and not drop below 9 volts when cranking ], a load tester is the best way. If all these things are ok, then I would suspect the igntion switch is faulty as it seems you have no power to anything at times.
Posted on Mar 17, 2011
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Posted on Jan 02, 2017
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