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Battery Drain 2007 LTZ

8 messages,  Last post on Oct 05, 2009 at 5:24 PM

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#1 of 8 Battery Drian 2007 LTZ by raleighwolf Aug 25, 2009 (10:13 am)
I have a 2007 Suburban LTZ. One of the main reasons I purchased this vehicle was to tailgate. However, every time I leave the radio on and the doors open, even with the dome lights off, the battery drains to a point of needing a jump.   The battery tests out fine.   The local dealer says that the iPod would drain it and that the LTZ's have a lot of "modules" that stay on when the key is in the ignition. They say there is nothing they can do to help.   I think that is crazy! or incredibly poor design!   Anyone else have insight? Replies to this message: steve_ (Aug 25, 2009 11:07 am) kiawah (Aug 25, 2009 11:27 am) tidester (Aug 25, 2009 12:17 pm) kiawah (Aug 25, 2009 2:36 pm) tidester (Aug 25, 2009 9:34 pm) rockman59 (Aug 30, 2009 4:50 pm) lastchevy (Oct 05, 2009 5:24 pm)
#2 of 8 Re: Battery Drian 2007 LTZ [raleighwolf] by steve_ HOST Aug 25, 2009 (11:07 am)
Replying to: raleighwolf (Aug 25, 2009 10:13 am) I've been reading the Inconsiderate Drivers discussion too long. I was thinking about the other kind of tailgating at first.   An iPod shouldn't drain your battery like that, much less the radio and interior lights. If the dealer is blowing you off, try contacting GM direct and ask them to open a case. Sounds like you have a parasitic battery drain somewhere since your battery checks out.   Anyone else?   Better hurry with a fix, football season is just around the corner!
#3 of 8 Re: Battery Drian 2007 LTZ [raleighwolf] by kiawah Aug 25, 2009 (11:27 am)
Replying to: raleighwolf (Aug 25, 2009 10:13 am) Well I have a 2007 Sub LTZ (and from Raleigh), so this post peaks my interest, but unfortunately I'm not going to have a lot of time to research this so I'll give you a couple of my thoughts. Perhaps you'll find the answer before I get around to looking at this, who knows when that will be.   First, I would not have thought that there is THAT much current drain which would drain the battery completely, so I agree thats omething is wrong or this is a dumb design.   Secondly, unless the battery is weak, I would expect that something of substantive current draw is on. A couple things that I would look at are: - Daytime Running Lights/dome/courtesy lights - auto leveling compressor/pump - AC compressor clutch - HVAC blower fans front or back - elect radiator / ac fans - heated seats, etc. - defogger circuit, elect windshield washer fluid - electric fuel pump? - or something you have plugged into power outlets. Try to figure out what might be on by listening to each of those, and whatever else I haven't thought about off the top of my head.   Third, if you can't find the drain culprit from just listening, then you'll have to put an ammeter on the battery to observe the battery drain, and then start popping fuses to figure out which circuit is causing the drain.   Fourth, if all else fails, you can always add a 2nd battery to the vehicle. Put in an isolator typical of marine multi-battery installations, where the start battery doesn't get depleted.   To the OP.....are you just running the radio, or do you have a bunch of things plugged in (like a portable refrigerator !!). What is it that you are purposely having "ON" while tailgating?
#4 of 8 Re: Battery Drian 2007 LTZ [raleighwolf] by tidester HOST Aug 25, 2009 (12:17 pm)
Replying to: raleighwolf (Aug 25, 2009 10:13 am) every time I leave the radio on and the doors open, even with the dome lights off, the battery drains to a point of needing a jump...   Given enough time, any draw of current will drain a battery. Are we talking minutes? Hours? Days?   tidester, host SUVs and Smart Shopper Replies to this message: kiawah (Aug 25, 2009 2:36 pm) tidester (Aug 25, 2009 9:34 pm)
#5 of 8 Re: Battery Drian 2007 LTZ [tidester] by kiawah Aug 25, 2009 (2:36 pm)
Replying to: tidester (Aug 25, 2009 12:17 pm) tidester,   Suburban's have an interior lights override button, which allows you to select whether you want the dome (and the other interior lights) to stay on when the doors are open, or to be off. That allows you to have the doors open, and not wear down the battery. Replies to this message: tidester (Aug 25, 2009 9:34 pm)
#6 of 8 Re: Battery Drain 2007 LTZ [kiawah] by tidester HOST Aug 25, 2009 (9:34 pm)
Replying to: kiawah (Aug 25, 2009 2:36 pm) Yes, but I was trying to find out how long it took the OPs battery to drain. Obviously, it would be quicker with the dome and interior lights on.   tidester, host SUVs and Smart Shopper
#7 of 8 Re: Battery Drian 2007 LTZ [raleighwolf] by rockman59 Aug 30, 2009 (4:50 pm)
Replying to: raleighwolf (Aug 25, 2009 10:13 am) This "battery draining" problem has been reported before. I can't remember the fix but this is not a normal thing. Any good battery should be able to play Ipods and radios 24/7 for a long, long time. Solid state electronics draw hardly any current from the battery. Your dealer should do some research. You too...get on the internet and see what you can find. This is not normal and there is a way to fix it.
#8 of 8 Re: Battery Drian 2007 LTZ [raleighwolf] by lastchevy Oct 05, 2009 (5:24 pm)
Replying to: raleighwolf (Aug 25, 2009 10:13 am) There is a major design flaw in the Tahoe and Suburban LTZ models. I have a 2007 Tahoe LTZ and my dealer nor Chevy can figure out the problem. I just had my 3rd battery replaced today on mine. It has the same problem as your Suburban, it only takes about 15 minutes with the radio on, doors shut, key in the ignition (not in ACC mode) and the battery will drain to the point of needed a jump. According to my dealer, they think it is a bad module but can't determine which one. Any other ideas out there?

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