Caprice and GM-related general tech topics.
That's right. Can also do a few other improvements like turn off torque management, better shifts and so on. I don't know of anybody that do mail order tunes on these but maybe a local tuner can do a quick tune or, if you want to splurge, do a dyno tune but it may not be worth it with a totally stock engine.
2011 Caprice PPV, 1 of possibly 4 in Canada!
As mooseman said earlier, if you really can't stand the sound and you want to disable DOD right now, disconnect the vacuum sensor on the brake booster. Zero downside apart from a permanent CEL but it's been great for me until I can get a good tune done.