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Dead Battery. Like Really Dead Battery.

Barbersboy said:
Truck battery died on Sunday at the Vikings game. AAA jumped me and I was able to drive 6 hours home. Monday it started right up and went to work. Tuesday morning dead again so I went down to Interstate and bought a $350 AGM, cussed alot, then cussed even more when I went to replace it because I snapped off the negative battery sensor trying to get the dang thing out. Anyways, it ran fine after the replacement only to have it dead again today.....Had to buy a jump box because it was stuffed in my tiny garage so I am currently $700 in the hole with the battery, sensor and jump box. Its currently at the dealer. Anyone have this issue with the battery dying like this?

Oh yeah, forgot to mention that the dealer informed me that I am 100 miles over my warranty so this won't be covered. I love this truck but It's like I keep getting kicked in the balls lately.
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Totally get the frustration but it happens. My 2021 BMW GSA 1250 battery was weak in 5-6m. Replaced under warranty, couple months later after a 2 week off road trip in Colorado. Two days in the trailer to TN, it was too weak to start again. BMW of Nashville told me it had to be on a maintainer when I wasn’t ridding it. GTFOH
Dealer in SC battery test failed, they tested a new BMW battery on the shelf to replace mine= load test failed. Dealer ordered a Yuasa for it under warranty, 4 years later with no problems.

Moral- some battery batches are junk from the manufacturer.
 

gemarsh said:
I'm not saying your guy isn't knowledgeable, but the alternator is controlled by the ecm, not a voltage regulator. JFYI
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The BCM criteria controls the load shedding of the electrical power management.
 

Barbersboy said:
This is true. The fob excites the ecm to make sure things are ready to start meaning the truck is awake and waiting.
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Yeah, the SUVs will kill a battery real fast with the remote in or near it. The foot activated liftgate module and sensors stay powered up scanning for instant opening. Over 10amps of constant draw.

My BIL’s new Yukon Denali Ultimate kept dying in the garage. His wife left the keys in her bag on the passenger seat 24-7. Not anymore and it has been fine since.
 

2023 at4 6.2 25k Never a problem for 1 st 2 yrs
Im going thru same thing if truck sits for more than 2 days wont start or barely starts
Dealer has replaced 2 batteries in a week
Says no parasitic draw
But i see that with 2 day old battery its always being charged at 15.4 all the time
Seems like it thinks a bad battery still in truck and overcharging
I still think something is pulling down the battery
No aftermarket access or FOB left in truck
Seems like
 

Latest update is the truck died again yesterday. Jumped it to get to work and called the dealer. It died again and I jumped it to get it to the dealer. But something great happened on Saturday while I was out and about with it. The tailgate opened on its own. Had the dealer check the switch and we may have found the culprit as the connections were corroded. He's replacing the switch and I should have it back this afternoon. Fingers crossed we'll see.
 

Barbersboy said:
Latest update is the truck died again yesterday. Jumped it to get to work and called the dealer. It died again and I jumped it to get it to the dealer. But something great happened on Saturday while I was out and about with it. The tailgate opened on its own. Had the dealer check the switch and we may have found the culprit as the connections were corroded. He's replacing the switch and I should have it back this afternoon. Fingers crossed we'll see.
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That very well could be your drain, but the dealer should have "seen" that.

Keyword...should have. That button has power to it all the time, just waiting to be pushed! Some dealers have good and bad parts throwers. Not many with mechanics...

project.webp
 

gemarsh said:
That very well could be your drain, but the dealer should have "seen" that.

Keyword...should have. That button has power to it all the time, just waiting to be pushed! Some dealers have good and bad parts throwers. Not many with mechanics...

View attachment 33948
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Agreed. They should have at least checked that even if it passed draw tests (three tests total) given the amount of problems they have had with those switches.
 

pinebaron said:
Don't compromise on your car battery! Get the best one possible. With my truck, after a failed OTA update, my dealer replaced both batteries under warranty which was a great delight to me.
For my Mercedes, I used to go to the dealer to replace its battery, I did that twice, first after almost seven years and the second time after another five years; OEM batteries only have a limited warranty. The third time I went to my local Walmart super store who had the best range of batteries; their battery has a three year warranty and was the best. I'll go back to Walmart for all my future battery needs unless I can get something better anywhere.
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Ive had good luck with Walmart batteries too use them in my boat for the trolling motors & solar charger for boat lift get 5 -6 yrs out of them
 

Barbersboy said:
Agreed. They should have at least checked that even if it passed draw tests (three tests total) given the amount of problems they have had with those switches.
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Did the new switch fix the problem
Im going thru same thing multiple draw tests all good but battery going down in charge every day after 3 days dead have to boost
 

CDNSS said:
Did the new switch fix the problem
Im going thru same thing multiple draw tests all good but battery going down in charge every day after 3 days dead have to boost
Click to expand...

A new bulletin was just released pit5689m relating to ground issue on passenger side fire wall.
 

gemarsh said:
The babymax uses a H8 agm battery. Maybe agm batteries are more?
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AGMs do tend to be a bit more. We recently put a new AGM in our '18 Tahoe PPV. It was a beeg mofo and was nearly $300. We do AGM because I have a HATE for flooded-acid batteries.

Since I don't drive our AT4 much, it's in the garage with a battery tender plugged into it when it's not on the road. We have found that a good battery tender will really extend the life of a battery, especially if the car is not driven much.
 

Barbersboy said:
Truck battery died on Sunday at the Vikings game. AAA jumped me and I was able to drive 6 hours home. Monday it started right up and went to work. Tuesday morning dead again so I went down to Interstate and bought a $350 AGM, cussed alot, then cussed even more when I went to replace it because I snapped off the negative battery sensor trying to get the dang thing out. Anyways, it ran fine after the replacement only to have it dead again today.....Had to buy a jump box because it was stuffed in my tiny garage so I am currently $700 in the hole with the battery, sensor and jump box. Its currently at the dealer. Anyone have this issue with the battery dying like this?

Oh yeah, forgot to mention that the dealer informed me that I am 100 miles over my warranty so this won't be covered. I love this truck but It's like I keep getting kicked in the balls lately.
Click to expand...
I got a new battery 3 weeks ago and just pulled in my garage and the whole thing shut down. Dead dead. No lights when I open the door. Can't even lock the doors w the fob. Just happened about :30 ago so no idea what i'm doing about it yet. I can't even open the hood because there is a cabinet over it. 🤬
 

gemarsh said:
This spells it out quite clearly.

GM Bulletin PIT5689M: No Restart After Auto Stop, No Crank, Dead Battery — Check This Passenger-Side Firewall Ground

GM bulletin PIT5689M addresses no-restart after Auto Stop, intermittent no-crank, dead battery, glow plug faults, transfer case errors, and multiple warning lights on Silverado and Sierra trucks. The root cause is often a loose or damaged engine-to-body ground at the passenger-side firewall...
www.duramaxnews.com www.duramaxnews.com
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Thanks for that. When I called the dealership they seemed to have no idea. I have a friend coming to my house. We will have to push it out a little to get the hood and see if we can figure it out or at lease get it started to get it repaired under warranty
 

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