Question about 1997 GMC Sonoma

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1997 Sonoma 4 cyl. 5 speed. Battery is fine but the emergency lights are flashing and the starter motor will not turn. Flashers will stop till I try to start it again. Plackstone8@aol.com

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It sounds like the anti theft security feature has been triggered or faulted and locked the vehicle down so it won't start. If that is what has happened, the dealer can fix it for a substantial fee. You can tell if your truck has the antitheft system by looking at your ignition key. If there is a computer chip or resistor in the key, then you have the system. If not, then the problem is somewhere else. Check the battery cables to make sure they are tight and in good condition. Make sure the wires and cable are attached to the starter and tight. You can check for voltage at the starter by taking a long screwdriver and shoring across the battery cable where it bolts to the starter and the engine block. If the starter is getting voltage, it should engage. Do this with the transmission in neutral, parking brake set and ignition key on. If the starter engages and starts the engine, then the problem could be the starter relay. If the starter does not engage, but you do get substantial sparks when you short across the starter then,the starter is bad. No Sparks at all means the battery is not supllying voltage to the starter.

Posted on Dec 29, 2010

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1997 sonoma turn signal flasher


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