| OEM Issues Original Equipment Repairs/Problems |
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08-05-2007, 11:18 PM
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Senior Member
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2006 Chevy TrailBlazer SS
Black 6.0L LS2 V8 AWD
Join Date: Apr 2006
Location: Old Bridge, NJ
Posts: 594
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Battery Guage
Ok so Im driving home just now from long Island (from video taping the worst wedding ever!!) and noticed something strange...about every few minutes or so my battery guage would drop down 4 notches very quickly then climb back up. When it dipped the cluster would dim then brighten back up. the truck didnt stutter or stall or lose power mechanically at all so im wondering what that was...never happened before unless I didn notice it but Im pretty good with that little stuff...my eye went right to it...any suggestions?? I am almost at 32,000 miles in only a year and 4 months...alternator? battery?
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12.49 @ 107.05....Tune Time Performance...thats all I have to say...
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08-05-2007, 11:43 PM
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Member
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2006 GMC Envoy SLE
Liquid Silver Metallic 4.2L I6 2WD
Join Date: Nov 2006
Location: Houston, TX
Posts: 155
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might be the alternator.
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08-06-2007, 08:27 AM
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TrailVoy Alumni
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'02 ORIGINAL SLT GMC BENTVOY
BEAT UP BLACK 4.2L I6 4X4
Join Date: Jul 2007
Location: MOLINE,ILL
Posts: 3,045
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Well Check Battery Terminals May Be A Lil Dirty.....kinda Sounds Like An Alternator Problem...which Im Sure U Allready Did That ...good Luck
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08-06-2007, 10:54 AM
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Member
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2003 GMC Envoy SLT
Pewter Metallic 4.2L I6 2WD
Join Date: Feb 2005
Location: Port Neches, Texas
Posts: 270
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You're still under warranty. Let the Dealer worry about it. It's most likely the alternator or voltage regulator (which is integral to the alternator).
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08-06-2007, 11:15 AM
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Member
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2005 Chevy TrailBlazer LS
Dark Gray Metallic 4.2L I6 4X4
Join Date: Dec 2006
Location: plymouth, mi
Posts: 281
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i have been having the same problem, replaced the alternator, checked things and still havent fixed it. its jst an annoyance as far as i see.
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08-06-2007, 12:49 PM
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Member
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2006 Chevy TrailBlazer SS
Superior Blue Metallic 6.0L LS2 V8 AWD
Join Date: Jul 2006
Location: Columbus, OH
Posts: 441
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Quote:
Originally Posted by ckss06
Ok so Im driving home just now from long Island (from video taping the worst wedding ever!!) and noticed something strange...about every few minutes or so my battery guage would drop down 4 notches very quickly then climb back up. When it dipped the cluster would dim then brighten back up. the truck didnt stutter or stall or lose power mechanically at all so im wondering what that was...never happened before unless I didn notice it but Im pretty good with that little stuff...my eye went right to it...any suggestions?? I am almost at 32,000 miles in only a year and 4 months...alternator? battery?
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Just out of curiosity, how much do your underdrive pulley(s) slow down your alternator? Amp output from the alternator drops relative to rpm, although it climbs quickly to the rated amp output from idle. If the alternator is running too slow and the amp demand is higher than the output, it will draw from the battery at that point. I'm just wondering if the pulleys are creating a situation where the battery is being worked more than normal and if the dealer may not honor the warranty on the charging system. Anyone with some more knowledge on the charging system and operation want to chime in? I'm just curious if it might be related to some long term effect of the pulleys.
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08-06-2007, 01:08 PM
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Senior Member
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2006 Chevy TrailBlazer SS
Black 6.0L LS2 V8 AWD
Join Date: Apr 2006
Location: Old Bridge, NJ
Posts: 594
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yeah I was curious if the UD pulleys were helping cause this problem..its not really a big deal but its a little annoying...ill throw a volt metter on this weekend to see how low its really going...
__________________
12.49 @ 107.05....Tune Time Performance...thats all I have to say...
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08-06-2007, 01:22 PM
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Junior Member
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2007 Chevy TrailBlazer SS
Black 6.0L LS2 V8 2WD
Join Date: Oct 2006
Location: effingham,il
Posts: 17
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Quote:
Originally Posted by treyster
Just out of curiosity, how much do your underdrive pulley(s) slow down your alternator? Amp output from the alternator drops relative to rpm, although it climbs quickly to the rated amp output from idle. If the alternator is running too slow and the amp demand is higher than the output, it will draw from the battery at that point. I'm just wondering if the pulleys are creating a situation where the battery is being worked more than normal and if the dealer may not honor the warranty on the charging system. Anyone with some more knowledge on the charging system and operation want to chime in? I'm just curious if it might be related to some long term effect of the pulleys.
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http://www.gmperformancetuning.com/f...ead.php?t=6902
Here is a little bit of info on how the system works.
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08-06-2007, 01:35 PM
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Senior Member
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2006 Chevy TrailBlazer SS
Black 6.0L LS2 V8 AWD
Join Date: Apr 2006
Location: Old Bridge, NJ
Posts: 594
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yeah i was just reading up on that but thats in the 07's...not the 06's and def not in the trailblazers I dont believe...
__________________
12.49 @ 107.05....Tune Time Performance...thats all I have to say...
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08-06-2007, 01:44 PM
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Junior Member
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2007 Chevy TrailBlazer SS
Black 6.0L LS2 V8 2WD
Join Date: Oct 2006
Location: effingham,il
Posts: 17
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Quote:
Originally Posted by ckss06
yeah i was just reading up on that but thats in the 07's...not the 06's and def not in the trailblazers I dont believe...
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My 07' TBSS owner's manual has something about how the charging system works. Sounds about the same as posted.
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