[LesBaer]

This has happened to me twice now. Both times were on hot days. I was stuck in bumper to bumper traffic on the highway after driving highway speed for over 20 minutes. I hit a traffic jam after cruising along with the windows open, Carplay running (music, phone driving apps), and ALP system on. Turned on the AC high and eventually stalled (due to driver error). I went to restart the car and it just barely turned over. I listed all of the above items that were running because they all continue to run when the engine isn't running. My theory is that this is putting too much of strain on the battery. Has this happened to anyone else...what do you guys think?

I'm not sure if this is a problem or I simply need a better battery. I don't stall very often so I don't know yet if this is going to happen every single time under these conditions or is just an isolated incident. The car does turn over, but it was very, very weak...it sounded like it was really struggling to start up. Sounded nothing like the initial start up, which is fine, even if I have the ALP system on, phone plugged in and music on high, and AC going high. I haven't performed many tests yet as I just thought to post this.

[Vyncynt]

- Run diagnostics on your car (Onstar team can also do this for you)
- Set your DIC to display battery voltage so you can monitor it
- Get your battery tested
- Get your alternator tested

[LesBaer]

Originally Posted by Vyncynt

- Run diagnostics on your car (Onstar team can also do this for you)
- Set your DIC to display battery voltage so you can monitor it
- Get your battery tested
- Get your alternator tested

Thanks. Ran diagnostics - nothing. Also have been watching battery voltage and it stays in the same place it's been since I bought the car. I could have missed an anomaly and will watch this more closely. This just happened for the second time in over 4k miles yesterday. I was also planning on getting the battery tested as well as the alternator (great suggestions), but was really curious if anyone else had this happen and what it turned out to be? A lot of times you can test a battery and it will test fine, but it really isn't fine.

[Glen e]

When its not fine, and says its fine, it needs a LOAD TEST...any auto parts store can do it.

[LesBaer]

Originally Posted by Glen e

When its not fine, and says its fine, it needs a LOAD TEST...any auto parts store can do it.

As I said before, I'm definitely going to test the battery and alternator. I'm not saying that it's not the battery or alternator, but this is a brand new car that has not displayed any other signs of a battery that can't handle load or a bad alternator. This has happened twice in 4k miles and I stalled quite a bit my first few days with the car.

I was also sitting in the car for an extended amount of time the day before this last happened with the AC pumping in the hot sun and everything on while installing a Smart Clip and fiddling with settings on a new radar detector. I then drove the car for an hour (hard) and stopped for gas. The car started right back up. I've tried twice to trigger this again yesterday when I made it home from my commute (the same day the issue happened) and it started up fine.

What I'm really trying to determine by asking this question here is if this may be a sign of something beyond the obvious that other owners have experienced. I do remember reading somewhere here that someone's car could barely turn over, but have not been able to track down that post to find out what happened.

[Glen e]

I'm not impressed with the battery that comes in the SS, it's conventional and average for the size of the load of the car. For some reason, the battery in the V-6 is much better in that it's a AGM battery, much better battery type than the SS battery .....Google AGM.

[Snowblind]

Did you check the terminal connection? If they disconnected the battery to install your Maggie and didn't tighten properly, that would cause what you are describing.

[LesBaer]

Originally Posted by Glen e

I'm not impressed with the battery that comes in the SS, it's conventional and average for the size of the load of the car. For some reason, the battery in the V-6 is much better in that it's a AGM battery, much better battery type than the SS battery .....Google AGM.

That's what I was hoping it was...I don't have problem upgrading to a better battery and I think I remember you making this comment before actually in that thread I couldn't find. I really hope that does the trick. Thanks.

Originally Posted by Snowblind

Did you check the terminal connection? If they disconnected the battery to install your Maggie and didn't tighten properly, that would cause what you are describing.

Nope, I haven't had a chance to check yet, but definitely will when I go to get everything tested. I got my Maggie installed at 1200 miles and this is the first time it happened since. I was tired when i got home last night and just walked into the house after trying to trigger it again a couple times with no luck. Thanks.

[jeverton]

Interesting... I hope this not a sign for things to come. My battery actually died completely after not driving for one week while detailing in the garage. Had to call roadside assistance to jump start and take the car to dealer. After driving for 45 mins and the staying idle at shop for another thirty mins the technician couldn't find anything wrong.

[Vyncynt]

Originally Posted by jeverton

Interesting... I hope this not a sign for things to come. My battery actually died completely after not driving for one week while detailing in the garage. Had to call roadside assistance to jump start and take the car to dealer. After driving for 45 mins and the staying idle at shop for another thirty mins the technician couldn't find anything wrong.

I bought a small battery boost/jump box. It's about the size of a small lunchbox and I use it for emergencies. Have not had my battery require a jump yet, but at the first sign of cold weather it might...

[scrap4u]

Interesting that you posted this as I've noticed the same thing--weak restarts. Today it's it's in the mid 90s here and I'm using Bluetooth for my phone and have ac running moderately. Stopped to get gas and when I restarted car it really seemed to struggle to start. I then noticed the battery gauge showed maybe an 11 level instead of a 14 where it normally is. I drive my car about twice a week and had just driven it yesterday. Thinking of having the dealer check it before buying a new battery since I only have 1100 miles on it but have had it since February.

[Slem]

After reading the battery topics I have been keep a eye on my gauge, a lot of the time it's sitting around 11volts, then sometimes it creeps up to 14 volts and stays there for a bit and then goes back down to 11 volts. Reading on here some have noticed this as well and the dealer told them this is normal, it's a smart charging system. I'm used to seeing my voltage at 14 volts most of the time in all the other vehicles I have owned.

[clanky]

I have a radar detector and a dash cam also hooked up to my car. Same things I had in my other vehicle just moved them over. Noticed that my Radar detector shuts off a lot (to not drain too much from the battery). When I start out in the morning it will be at 14, but give it about 10 minutes and it'll be down to 11.5-12. I haven't had any problems cranking it yet, but that sure does seem like a weak battery to drop that fast doesn't it?

[KenH.]

I traded my fully loaded silverado ltz on the car and it used to do the same thing start at 14 volts drop to 12 and sit there for a while. Never had an issue with it and the camaro acts the same way.

Weak restarts sounds to me like a bad battery connection, bad battery, or bad starter. Happening only on restarts makes it really sound like a bad battery that just cant take the heat.