09/02/2026
We’ve got another brand new 2026 GMC Denali Ultimate in the shop, but we’re taking a little different approach with the sound system in this one.
Instead of replacing all 12 factory Bose speakers, we’re keeping them and re amplifying the entire system with a Helix V Twelve DSP amplifier. This gives us more power to the factory speakers while also giving us full DSP control to properly EQ, time align, and tune the system to get as much performance as possible out of what’s already in the truck.
For bass, we’re installing our Stage 1 GM under seat enclosure finished in OEM matched upholstery for a clean, stealthy factory look. This setup will be loaded with (2) full size Helix IQ 12’s powered by a Wavtech link1500.1.
This is a super solid setup for someone who wants a big improvement over the factory Bose system without going crazy and replacing every speaker in the truck.
The other nice thing about building the system this way is that we’re already putting the foundation in place. If the client decides later that he wants even more output or better speakers, we can simply replace the factory speakers and retune the Helix DSP instead of starting the entire system over again.
Everything will be installed cleanly using our bolt in mounting and plug & play integration with the amplifiers and wiring hidden behind the rear seat.
This is just the beginning of this build, so stay tuned to see how it turns out.
If you’re interested in upgrading the factory Bose system in your Silverado or Sierra, send us a message or visit cbcustoms.net.