Alright, so I've done some searching and can't find any posts similar to what I'm dealing with. The closest I can find on google is something referring to the battery current sensor. Aparrently its only on 2005+ Tahoes though, but it senses draw and adjusts alternator charging output accordingly. Mine is a 2000, and when I went through my Big 3, I saw no such sensor as expected.
The issue I'm having is a lot more noticeable now that I have a Stinger volt gauge in the dash (Installed same time as new HO Alt, 9/11/19) When I start up, I'm at around 14-14.3v.. after warmed up, 13.9v is consistent. Now... I've notice multiple times that when I am coming to a stop, or slowing down to make a turn, I see a large drop to high 11's to mid 12's.. but straight back up again to 13.9v after fully stopped or out of the turn I was making.
Happens regardless of draw (Lights on/off, heat/ac on/off, volume high/low)
I would like to assume this has something to do with my main battery, seeing as how its a standard wet cell and has some age to it. I plan on swapping for an NSB34/78 in the near future when the wallet isn't empty. I just want to make sure I'm not missing something stupid or something that could be addressed in the mean time until I get a new cell up front.
Also for the record, while sitting still at idle, or at cruising speed, full tilt on the music yields less than .1v drop if any, no dimming either.
2000 Tahoe 5.3
Big 3 (4 soon) in 2/0
Standard Group 34 wet batt
Not sure what other info is needed, but I can get as specific as you need... Any ideas?