How's your volt gauge? - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 01-03-2008, 01:19 PM
Thermo1223 Thermo1223 is offline
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2004 GMC Envoy SLE XUV
Dark Green Metallic 4.2L I6 4X4
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How's your volt gauge?

I ask because mine seems to read awefully high and I'm afraid it's cooking the battery on my (new to me) Envoy.

Reading it seems to indicate 15+ volts.

Any insight is appreciated.
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Old 01-03-2008, 01:52 PM
icase81 icase81 is offline
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Mine is Volt-o-riffic!


Naw, its normal for it to be around there when the car is running. Thats the alternator output, not the battery voltage.
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Old 01-03-2008, 02:26 PM
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MAY03LT MAY03LT is offline
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mine isnt doing so well.....hit 10 today
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Old 01-03-2008, 02:27 PM
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DonWs05 DonWs05 is offline
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SInce I'm still new at owned a TB. Put a digital volt meter across the bat with nothing turned on and the motor revved a bit and see what you get. I don't have a max number but I'd suggest anything over 14.2 to 14.5 is excessive. I wouldn't trust the dash gauge.
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Old 01-03-2008, 03:28 PM
Thermo1223 Thermo1223 is offline
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Quote:
Originally Posted by DonWs05 View Post
SInce I'm still new at owned a TB. Put a digital volt meter across the bat with nothing turned on and the motor revved a bit and see what you get. I don't have a max number but I'd suggest anything over 14.2 to 14.5 is excessive. I wouldn't trust the dash gauge.
That was my thoughts, I know 14.5 is usually the top of what an alt will output so the 15+ had be worried lol
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Old 01-03-2008, 04:51 PM
LINKUPS1 LINKUPS1 is offline
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15 volts is on the high side,I could see 15v if the with battery was dead and the alt.was putting the load to the battery to recharge it.
Check voltage with a voltmeter at the battery with the truck running,dash voltmeter could be reading wrong.15 volts to the battery all the time will kill your battery,headlight,etc.
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Old 01-03-2008, 05:19 PM
Thermo1223 Thermo1223 is offline
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2004 GMC Envoy SLE XUV
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Quote:
Originally Posted by LINKUPS1 View Post
15 volts is on the high side,I could see 15v if the with battery was dead and the alt.was putting the load to the battery to recharge it.
Check voltage with a voltmeter at the battery with the truck running,dash voltmeter could be reading wrong.15 volts to the battery all the time will kill your battery,headlight,etc.
I agree, and I am definetly going to do so if I can find my multi-meter. If not a trip to Advance Auto Parts.

Thinking of picking up a scangauge also since my OBDII reader for VW's doesn't work with GMC.
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