Question about 2003 GMC Sierra 1500
It acts like its in the security system
If you security system. Disconnect the Positive from the security
and test the starter motor, see if there are CLICK and Start, if does the problem is the security system.
If the problem persist, you must RUN the scanner/computer for easy diagnostic and fix it.
The electronic now is very complicated see the diagram attached.
God bless you
Posted on Jul 27, 2013
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Posted on Jan 02, 2017
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