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I used the trailer connector on mine ( I can’t tow with it anyway, show truck) and ran a wire all the way up the frame to the engine compartment where the tender is mounted. That way when I back it into my driveway I just have a short extension cord that goes from my garage door to the rear bumper and there’s no cord across the driveway. You could add a second trailer connector to the rear if you wanted to do that or put it somewhere else.
I also have the same issue with my 2021 Yukon Denali. Practically from the time I got it, if it sets for several days the battery would be low. Like there is a drain. A couple of months ago after driving it, I parked for a few minutes then couldn't start it. The battery was completely dead. After the battery was replaced, I no longer have the problem. It can set for a week and it seems to still be fully charged. I'm now wondering about the amp capacity of the battery that comes with the new vehicle, as compared to the replacement. Did I get a low capacity or defective battery to begin with. I also wonder if there was an update downloaded that maybe corrected the drain issue. I got very tired of the dealer telling me there was nothing wrong and that I should just drive it more.
I keep my key fob in a faraday pouch. I had battery problems from the beginning. I don't know if its a parasitic drain or a bad battery. The dealer testing it does no good, right up until it left me stranded.
Might do some research and check the build date of your Yukon vs the sell date when you got it. A battery sitting on the dealer lot for 6 or 8 months and left discharged for a time might have had a sufate build up on the plates and that kills capacity. Usually the OE battery is a real workhorse for many years.
Have you got a ampmeter you can put on the battery cable to see if you have a parasitic drain? The battery on my 17 Tahoe had a 6 amp draw, the mechanic I took it to didn't believe me until he checked himself. Long story short, we replaced the passengers heated seat module and all is well I HATE PARASITIC DRAINS!
Same issue with my 2020 Denali. Battery life was only 11 months. I dug around on the internet and found if key fob or fobs are left in your Denali or within about 6 feet, the vehicle tries to communicate with the fob and causes the battery of the vehicle to die. Present battery’s life is 18 months and still going since bringing fobs into kitchen. I don’t think adding a battery tender is a correct solution, yet.
very helpful. Maybe ill ask the dealer to look at it
www.gm-trucks.com
I have a 2021 Denali and have the same issue, only it used to take only 3 days to drain my battery. It was like this from the day I bought it. Several months ago I had the battery replaced and so far haven't had any more battery issues. I'm wondering if the problem is the batteries that come with the vehicle don't have enough capacity, or they are defective.
I had battery problems on my 2021 Denali. Battery was always low. I keep the fob in the house in a faraday pouch. The dealer checked the battery and denied anything was wrong, that I just need to drive it more. It would go nearly dead from setting 3 days. After all of this nonsense, it seems so far that a new battery fixed the issue. My driving habits haven't changed and my battery always has a good charge now. I think the manufacturer puts some lousy batteries in these vehicles.
