Weird battery issues.

[zach2011]

So, my parents will not let me replace my battery unless the dealer or someone diagnoses it as bad. I went to O'Reilly's Auto Parts and they checked it for free, and unfortunately came up as good.

Which it's not. This morning, I was late for school because it wouldn't start. At all. So I had to get my dad's charger and charge it that way; no one else was home to boost it or anything.

It drains way too easily, and I almost thought that maybe it was one of the Tahoes affected by the issue where the computers stay on when the car is off and drained the battery. But this issue just recently came up about a month ago, or two.

Friday, I am taking my mom's Escalade and she'll take the Tahoe to the dealer because I have an appointment scheduled to get it checked out. Do you guys know anything that might be the problem before we do that?

 

[eandj23]

electrical issues can come from a number of things. From the looks of things, the only electrical change you made was your HID's, unless you have after market DVD or NAV. If the DVD and NAV are after market i would bet thats the problem. I highly doubt the HID's are the problem but they could.

Are your interior lights functioning?

A friend of mine cleaned his car and accidentally turned the interior lights switch to down to low and had the same problems you are having. I would check those little things before assuming its a big computer problem.

 

[zach2011]

Thanks but I have checked all of that. My DVD and nav are stock OEM GM, and I put my Silverstar halogens back in awhile ago. The interior lights and everything work fine. I can not think of what it would be.

 

[badtothe bone]

Your problem is that the body control module needs to be flashed and updated.

The program that runs that modules has some errors in the lines codes and is allowing something to run after the key is shut off.

When ends up happening is that it will run until the battery is dead or discharged and the blame is placed on the battery and not on the computer.

If you take it to any GM dealer, I am sure that there is some technical service bulletins that will explain the problem better then I can - due to the fact that the banner ad covers most of the page while I am trying and trying to see what I am typing and cannot see - because of the ad's.

 

[NASTY GM]

It's amazing what a cheap battery GM puts in these suv's

 

[07-fivethree]

You know what. When I bought our Yukon, the very first night we had it home, I went outside to start it and leave, and it wouldnt even turn over. No lights, radio, anything. I was furious. I called our local GMC dealership, and the sales manager said that his Tahoe was notorious for dying or getting low. He said that whenever he used the remote start or liftgate or second row fold down option, it would drain the battery fast. So we've kinda learned not use all the nice remote things as often. lol, whatever.

I know some of my past trucks have had a battery saver option where the truck would shut completely down and leave you enough battery to start, this way you were never really stranded due to a dead battery. That was a Ferd tho.

 

[zach2011]

Your problem is that the body control module needs to be flashed and updated.

The program that runs that modules has some errors in the lines codes and is allowing something to run after the key is shut off.

When ends up happening is that it will run until the battery is dead or discharged and the blame is placed on the battery and not on the computer.

If you take it to any GM dealer, I am sure that there is some technical service bulletins that will explain the problem better then I can - due to the fact that the banner ad covers most of the page while I am trying and trying to see what I am typing and cannot see - because of the ad's.

Well I knew about this service bulletin and thought this may be the problem but, if it was, that would mean that my Tahoe would be doing this since I first got it right? It only started the odd battery problems recently.

I appreciate your post - It's going to the dealer Friday.

 

[nytahoe]

could be an alternator prob. could be draing the batter when it sits. like a diode that has gone bad. that happend in my dad vette. if it sat for 3 day or more it would be dead.

 

[zach2011]

Could be, but I dunno how to even check that!

 

[nytahoe]

if it going in friday i would let them do that. take the alt off and take it to some one that will test it for free.