mobile-menu-icon
GM Authority

Reply To: 6.2 Denali/Sierra should have dual exhaust!

December 28, 2014 at 5:22 am #81226
Z15
Participant

Dealer installed option, not factory although you can order it and then GM has the system dropped shipped from the supplier to the dealer once your vehicle is shipped. Its call an LPO, Limited Product Option. It has limited warranty, not by GM.

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.