2019 Tahoe 5.3 LT Battery Drain

[2019Tahoe]

I have a 2019 Tahoe 5.3 LT. When the truck is off and the temperature outside 30° and below the steering wheel lights light up and then the infotainment screen illumitaes grey and then goes out. 3 minutes later the same thing, steering wheel lights up then the radio screen grey and then goes out. The colder it gets the more it happens. This eventually continues all night till the battery is dead. I have to start the truck every 2 hours or the battery dies. When its warm its fine no issues all summer. As soon as the temp drops below freezing this happens. Help is appreciated

 

[PPV_2018]

Something is “waking up” the BCM

when this is happening, is the truck locked, or unlocked

How old is your battery, and is it confirmed good . . . Have you inspected and confirmed clean & tight battery connections, posts, terminals, grounds . . .

 

[Fless]

Move the FOBs across the house and/or use a Faraday bag for them as a test. They may be close enough to wake things up.

 

[2019Tahoe]

Something is “waking up” the BCM

when this is happening, is the truck locked, or unlocked

How old is your battery, and is it confirmed good . . . Have you inspected and confirmed clean & tight battery connections, posts, terminals, grounds . . .

Battery is brand new as of sunday. This is the 3rd battery ive replaced. It happens when truck is locked and unlocked, and after it sits in the cold untill it happens. Like today my wife took it for a ride to the store got home it sat for 2 hours in 24 degree weather and it was happening every 3minutes

 

[2019Tahoe]

Move the FOBs across the house and/or use a Faraday bag for them as a test. They may be close enough to wake things up.

The key fobs? Really? That can trigger that to happen?

 

[Fless]

Yes, they can. Try it and let us know if things change. Seems repeatable.

 

[2019Tahoe]

Yes, they can. Try it and let us know if things change. Seems repeatable.

I tried it its still doing it. It only happens when the temp is 30 and below? All summer its fine

 

[PPV_2018]

Have you inspected and confirmed clean & tight battery connections, posts, terminals, grounds . . .

?

 

[2019Tahoe]

?

Yes just installed new battery myself everything is clean and tight

 

[RoadTrip]

Cold air puts moisture in weird places. Winters seem to enjoy the havoc.

Although the battery cables are known to corrode from the inside out, this problem sounds more like frost forming underneath the engine fuse block and creating the new connection.

Remove the fuse block and check underneath. Consider replacing the battery cable, if you haven’t already.