Another bad voltage regulator?

AC Delco offers one also it may be the best parts store offering
12SI AC Delco replacement for my Jeep
Even had a GM p/n on the box.
Junk not made to factory GM spec's. Not even close. :(
When it comes to replacement parts its all a crapshoot. QC isn't even close to what OEM ever was, even at its low points.
Another alternator problem
more pics here
Stop in for a cup of coffee

Craig. Sounds like like you're on the right track.