HomeAll RepliesReply To: 6.2 Denali/Sierra should have dual exhaust! Reply To: 6.2 Denali/Sierra should have dual exhaust! Sponsored December 29, 2014 at 5:11 am #81292 GTParticipant I’ve been thinking about this, of course my wife won’t see any purpose behind this, but I believe it this is part of an “emissions recall” with the 6.2. lol Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored