Gmc 2024 Sierra 2024 Sound System Upgrades Cookie. The speaker system is good, however i honestly feel like the one in my at4 was better, which is shocking. 2024 sierra 2500 at4 with bose premium sound system… “7 speakers with richbass woofer.” it’s not bad.

Your gmc infotainment system is designed to be straightforward and easy to use, but it’s important to understand how to leverage all of the system’s capabilities. Could just be in my head though, so who.