Question about 2006 GMC Envoy

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I have a 2006 envoy and the light are going dim and the battery volts drop when car is at a stop light. i changed the alternator and they say the battery is good, now i don't know what to do... can you suggest something?

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Check all the battery cables for corrosion or damage. Tighten all ground connections. If everything is in good order, I would suggest getting a new battery. Batteries can have an internal short and be good one minute, bad the next. Sears Diehards used to be the world's worst about shorting out.

Posted on Dec 31, 2010


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Was the battery recently disconnected, and does this only happen when the defroster/AC is on? Easy fix if so, let me know.

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Battery Died in my 06 Focus I changed it but now the Battery light is on (but very dim, you can only see it at night)

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Volt gage!!

that sounds about right . the voltmeter just tells you how many volts the battery is holding,if you turn your lights on high beam turn your wipers on and your heater all at the same time,as soon as the current being used is greater than the alternator can charge , you will see the needle on the voltmeter drop back that is normal and logical. if you are running spotlights etc you may need a higher wattage alternator a lot of vehicles come out with 55watt alts.and the owners change the alts. to 100 watt alts... NOW as long as yours is not dropping below 12volts it is not draining your battery so there will be no ill effects it just means the alternator is working close to its capacity-------------------- there you go ,I would not be worrying too much unless it flatens your battery Idony think you need worry "youdoit"

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