1999-2026 GMC Sierra Double/Extended Cab 4x8 Quad 8 Bass Package

This 1999-2026 GMC Sierra Double Cab and Extended Cab 4x8 quad 8-inch bass package is built for truck owners who want a complete Nemesis Audio bass system with clear fitment, strong output, and shipped-to-your-door convenience.

• Fits GMC Sierra 1500, 2500, and 3500 Double Cab / Extended Cab trucks in the 1999-2026 fitment range
• Quad 8-inch bass package with ported truck subwoofer enclosure
• Includes Nemesis Audio subwoofers and FIERCE-5KD amplifier package components
• Designed for daily bass, truck audio upgrades, and clean under-seat-style installs where fitment is confirmed
• Free shipping and Dallas installation support available through Super Car Audio

Fitment depends on cab configuration and model year. This listing is for GMC Sierra Double Cab / Extended Cab applications; Crew Cab, Regular Cab, and Chevrolet Silverado listings should be matched separately to avoid ordering the wrong enclosure.