What size speakers are in a 2015 GMC Sierra 1500?
The 2015 Sierra 1500’s standard audio setup uses 6.5-inch speakers in the front and rear doors with small dash tweeters; the Bose Premium Audio option adds more speakers and a subwoofer for richer sound. Exact configurations can vary by trim and market, so check your vehicle’s build sheet for precise specs.
Base system speaker sizes
In the base configuration, you’ll typically find the following speaker sizes and placements:
- Front door speakers: 6.5 inches
- Rear door speakers: 6.5 inches
- Dash/tweeter speakers: 1 inch (tweeter size, located in the dash/A-pillars)
In this standard setup, there are usually six speakers: four 6.5-inch drivers in the doors and two dash tweeters.
Bose Premium Audio upgrade
The Bose Premium Audio package enhances the system with additional speakers and a subwoofer for more expansive sound, typically featuring around nine speakers in total depending on trim and market. The door speakers generally remain 6.5 inches, while additional tweeters and a dedicated subwoofer are added.
- Front door speakers: 6.5 inches
- Rear door speakers: 6.5 inches
- Additional high-frequency drivers: 1 inch or similar (tweeters in enhanced locations)
- Subwoofer: dedicated sub driver or enclosure (location varies by model)
Because Bose configurations can vary by production year and market, sizes and exact locations may differ. If you need precision, consult your vehicle's build sheet or service manual for the exact speaker lineup.
Summary
For a 2015 GMC Sierra 1500, base models use 6.5-inch front and rear door speakers with small dash tweeters; the Bose Premium Audio option adds more speakers and a subwoofer for richer sound, with the door sizes staying the same but the overall system expanding. Always verify with your VIN-specific documentation.
