Question about 2008 GMC Sierra 1500 2WD

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I have a 2008 gmc sierra 1500 series and it turns on but i can't get it to shut off?

Its a gmc sierra 1500 5.3 it has no cruise no electric start it has a telescopic steering it has a/c its plain jane

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I think I would try a new ignition switch or at least unplug the switch after the engine is running and see if it stops running. When you initiate a start, a series of relays turn on in the powerbox. If the ignition relay is melted inside itself, it will not break connection. You can research and get diagrams, videos, and photos on the Web. Just be specific and enter the year, make, and model and ask for a wiring diagram or fusebox or powerbox for that truck. Then chose from the results.

You should be able to identify the correct relay from the diagrams. Relays are not terribly expensive.

Posted on Nov 29, 2014

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