sible Battery Issues..

[WVI]

We've traveled from S.Illinois, to Spokane, WA towing r 37ft travel trailer.
Lately, there was a couple times my mind said, "sounds like its turning over a bit slow..I wonder if there's a battery problem?"
We've been here a few days now.
I have done some short around town trips, via hiway and surface streets.
This AM, when I started it here in the rv park, just to run a bunch of stuff up to some rental cabins in the park, there was a message on the DIC about "service system, low battery" It happened twice, but after the third run, maybe a total time running of 15 minutes, I dont get the message.

The iDash shws the batts at 12.8 volts resting and just over 14 volts running.

I have a service appointment at a local dealership Monday AM, but I'm looking for opinions/thoughts as to if it may be just batteries...there's so much electrical on this thing, I'm a bit leary of the dealer route, but dont want to just throw new batts in unnecessarily.

about 41000 miles on the trk, and the batts look to be the OEM GM.
Thoughs appreciated.
TIA

owns 2023 GMC 2500

 

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[gemarsh]

You would not be the first on here to have batteries go bad. Even newer than a '23.

12.8 is good, but need to know what it reads when cranking or a load test done.

It's not my dime, but replace both, if one tests bad. You'll thank me in 6 months.

 

[john151ama]

I have a 2024 and had similar issue a couple times. I replaced mine earlier this year and no problems since. I think my OEM battery was no good. Replaced with this one in February and it’s solid. (I have the 6.6 gas / 1 battery)