I still have the original AC Delco batteries in my '06 Chevy 1500 and in the '06 Cadillac. Both are right at 5 years old and both have almost 100,000 on the vehicle. No problems with the Chevy...but if I leave the Caddy parked for over 10 days with the Radar Detector on and the cell phone charger plugged in...it may or may not start without jumping it.
We've never replaced an OE AC Delco with another one when they died, just got something from Autozone or Oreilly but we've never gotten less than 4 years out of an original battery.
Optima red tops are crap!! I have tried 4 different time in 2 different vehicle. They run down fast when the vehicle is at idle. Delco, Junk junk and more damn junk!! I put lots of batteries in equipment. The best I found in Exide and Fleetguard. Fleetguards are cheaper and last for a long time. Dont buy caterpillar batteries either, Like Delco their french made crap!! Dont spend more money on hiped up batteries because their all just plastic, lead , and acid... The WalMart yellow batteries are pretty good to. Anything performance, I use turbo start 16 volt...
