Question about GMC Cars & Trucks
I'm sure cold weather is playing a big factor in this, but i don't know.
You probably have a dead cell in the battery. Have it load tested at a auto parts place. Is usually fr
Posted on Feb 08, 2014
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Posted on Jan 02, 2017
, do a simple test on the charging system...check battery voltage. should be 12v or better. start engine & check volts at idle, no accessories on. volts should read 13.5 -14v. Turn on all accessories(including headlamps on high) volts should drop slightly but should not creep down. Definitely not below 12.5. If voltage drops lower than 12.5, the regulator (in the alternator) is not working. either change regulator or change entire alternator. Alternator drive belt should have sufficient tension so that alternator cannot be turned easily by hand. If it can, check belt tensioner.
Posted on Mar 18, 2009
check voltage at battery, when running it should be 14 volts or a little higher, when engine is off it should be at least 13 volts at battery. if the alternator is not charging it will not replenish battery. if the alternator when running puts out at least 14 volts, then I would say its your battery. not letting car start. the battery could very well be bad. if you do not have a tester, any auto parts will test for voltage for free.
Posted on Feb 01, 2010
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