23 Yukon Denali, Dead battery, won’t start from day 1. SOS

[WalleyeMikeIII]

A test on a carbon pile tester would tell you for sure.

 

[01dailey]

A test on a carbon pile tester would tell you for sure.

The load test you suggest would tell the state of the battery, but there is a need to look beyond this. The dealer should check for battery drain. This can be done by disconnecting the battery terminal and attaching a amperage meter and observing the current flow when the vehicle is parked and has been inactive for a while. When the electrical system has gone to sleep, there should be less than 50 milliamps current. Not sure of the exact spec. 25 milliamps is better. If it is 100 milliamps or more, there is a problem. Something is not shutting down and is causing a drain. To isolate the problem and find the drain, you can pull one fuse at a time until there is a response on the test meter. Whatever the problem, let the warranty handle it.

 

[StephenPT]

Assuming you have the hands free tailgate feature. It’s worth reading through this TSB and pulling the fuse they mention to see if the battery draw goes away.

https://static.nhtsa.gov/odi/tsbs/2023/MC-10231664-9999.pdf

 

[yyateem]

Took delivery 3 days ago.
200 miles on the clock, battery has been dead every time from day 1.
Charged overnight, 2x50 mile trips didn’t help.
The only thing that gets the Yukon to start is a live jump.

Has anyone experienced this ? Once started codes clear, drives fine.

I face the exact issue from the day 1 that l receive the car in the showroom,

Finally they told I me that my car is the 4th car that have same issue ( as GM said to them) ,the probelme because of computer module of the car or full fuse box.

In my case they change the fuse box of the car.


But, I disappointed with the car after all what happened to me and I refund all my money from the dealer.

Read my story in this site.

Still I am scare to buy again new Tahoe or Yukon.


Good luck with your car.

 

[Wert]

Took delivery 3 days ago.
200 miles on the clock, battery has been dead every time from day 1.
Charged overnight, 2x50 mile trips didn’t help.
The only thing that gets the Yukon to start is a live jump.

Has anyone experienced this ? Once started codes clear, drives fine.

My 2022 Yukon has been to shop because of dead battery 3 times. Currently in shop and they do not know what the problem is. Also don't have Park Assist chip yet. 13500 miles on it purchased, new in October 2022, ordered in Nov. of 2021.

 

[ninjaplumber]

A new bulletin on battery draw

3rd-Row Power Folding Seat Switch Connection – TechLink

gm-techlink.com