Lfd49

The reason o asked is because it has never happened in any other vehicle I have ever owned regardless of make. Either in Ma. or here in SWFL. Thank you all for taking the time to comment on the post I appreciate it.

Thanks for the info, I have the 5.3 flax fuel

Thanks, I have a friend here that has a 2013 Sierra 1500. Basically identical to my truck, and he has never seen it happen to his.

Also, I am interested in installing an inverter as I have a small handyman gig and it would be convenient to have power to the back of the truck.

Added, also, he has been in business for 30+years rebuilding electrical equipment for the fishing fleet down here as well as automotive.I have no reason to doubt him, he’s done work on my vehicles in the past.

He didn’t have a 130A on the shelf, and I asked him if it would be possible to install a larger one.

I recently had to change out the original battery in my 2013 Silverado. Since then, it has had a chaffing problem, I brought it to a shop that repairs/rebuilds alternators and such and he noticed that the original 130A alternator was “burned up”. He replaced it with a rebuilt 160A alternator and it worked for about 4 days then I noticed the volt gauge going to roughly 15V on start up then steadily dropping in the first 5-10 miles of driving, down to 12.5 V. I know these are accurate values because I put my own tester on the system when I saw the gauge. I returned to the shop and he bench tested the replacement alternator and it passed just fine. He decided to put a second one in just in case, with the same results. I took the truck to a Chevy dealership and was told(after two days) and $157 , that “this was a normal swing and that it was the system not charging when it wasn’t needed”. I’ve driven almost everything over 42 years and never saw a volt gauge behave like this. Anyone else having this issue? Thanks for reading.