Question about 1989 GMC Sierra

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My 1982 gmc sierra will only start occasionally, but most often not. batteries are fine but problem persists. any suggestions

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  • krandolph264 Sep 13, 2008

    Key wont turn in ignition switch on my 89 Sierra truck

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Need more details. Is this a manual or auto transmission? Will it crank over every time?

Posted on Aug 09, 2008

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Ok, it starts some times, so it's intermittent.

Could be wiring. Wires go to the battery and some go from the battery to other components (voltage regulator, etc). Make sure all wires are clean and fastened tightly. It could also be the voltage regulator, the coil, etc....Auto Zone might be able to run a simple diagnostic (though not a thorough one).

Check the battery cables. Not just the ends but look down the wires where the insulation starts. You should see clean bright copper on the copper one. If it looks dirty between wires, you need new cables.

Other possibilities are dirty fuel or air filters. Fuel filters can be temporarily cleared out manually, which should fix the problem unless it's really gunked up.

Could be the distributor, its cap or wiring. My brother in law says have someone try to start the car at night. Lift the hood first, in the dark. If you see sparks, then some wiring is bad and needs replaced.

Could be the alternator, but your battery would keep running down so assume it's not.

Other possibility is the ignition switch. Not easy to fix you need a professional. Does jiggling the key help?

Good luck,

MomsyKat

Posted on Aug 08, 2008

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