Question about GMC Sierra 2500
The GMC Sierra has an alternator that sends electrical current to various devices in the vehicle while the engine is running. Most alternators made today include a voltage regulator that ensures the voltage level remains constant. You may need to replace the alternator if your battery keeps running down or your headlights become dimmer while driving.
I would recomend to have the alternator replaced .
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Posted on Apr 26, 2010
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Posted on Jan 02, 2017
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