Don’t forget to check connections at starter as well; a little bit tougher to get to & ensure you have a good ground. Extra ground leads don’t hurt & for the record...12.60 is a fully charged battery...14.5volts while running would be about the max voltage you’d want it set to. AGM batteries prefer closer to 14.0
Ck idle rpm; as TB’s or Maf’s may need cleaning & don’t forget about a quality serpentine belt...good insurance to replace every 50-60k
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