Gmc 2025 Sierra 2025 Sound System Upgrades Unleashed. 82 interior photos new 2025 gmc sierra 1500 at4*3.0l/cooled seats/bose speaker system* 4 2025 gmc sierra 1500 review: I picked up my sierra 3 weeks ago.

2025 sierra 2500 at4 with bose premium sound system… “7 speakers with richbass woofer.” it’s not bad. Took it to a gmc dealer a couple tuesdays ago expecting it might need a simple software upgrade or some other easy fix.