Dead Battery. Like Really Dead Battery.

[ryguy1216]

Has anyone found the solution to this... I just woke up to take my kid to school today and completely drained. couldn't even lock door or anything.

 

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[CDNSS]

What yr is yours , my 2023 dies after about 3 days of non use but not always very intermittent
Dealer has had it twice for a few days each cant find the issue they think its a module waking up worse in cold weather

 

[ryguy1216]

2023 AT4 Crew Cab Duaramax... Never had any issues but moved to PA a few weeks ago and started leaving it outside. Not sure if the cold is what caused it but I drove it the night before.

 

[CDNSS]

Mine is a gas 6.2 I do know that the duramax had an issue withground cables being lose or corroding causing draw on battery but not on 6.2
I had parasitic draw test but they never saw a big draw thats why they think intermittent

 

[pinebaron]

2023 AT4 Crew Cab Duaramax... Never had any issues but moved to PA a few weeks ago and started leaving it outside. Not sure if the cold is what caused it but I drove it the night before.

I usually leave my batteries connected to a charger especially when its cold (like its here in WA) or if I don't intend to drive the truck for a few days which happens pretty often with me.

 

[SierraTRK]

2023 AT4 Crew Cab Duaramax... Never had any issues but moved to PA a few weeks ago and started leaving it outside. Not sure if the cold is what caused it but I drove it the night before.

I'm in SE PA, and I doubt it was from the cold. My 2025 AT4X lives outside year round and starts just fine, even at 10 degrees. Have a load test done to see if your battery is getting weak, or have the dealer check your tailgate switch. If you never had it checked, there was a TSB/recall for them.