Mixsuper Liner Under-Seat Storage for Silverado & Sierra — 6pc Black ABS Kit with Removable Bin

Mixsuper Liner Under Seat Storage is a custom 6-piece ABS organizer kit that tucks neatly beneath the rear seats of compatible Silverado and Sierra trucks to keep tools, gear, and everyday items organized and accessible.

This under-seat storage system is precision-shaped for select Chevy Silverado and GMC Sierra Crew Cab and Double Cab models from 2019 through 2026 (1500) and 2020 through 2026 (2500HD/3500HD). Instead of loose items rolling around the cab or occupying bed space, the Mixsuper Liner stores essentials under the rear seats in a durable, moisture-resistant housing with smart compartments and a removable inner bin.

Which truck models and seat types is this storage compatible with?

The Mixsuper Liner is engineered specifically for 2019–2026 Chevy Silverado 1500 and GMC Sierra 1500, and for 2020–2026 Silverado/Sierra 2500HD and 3500HD trucks. It fits only Crew Cab and Double Cab layouts where there is usable space beneath the rear bench. Single cab and certain aftermarket seat configurations may not accommodate the unit.

• Fits Chevy Silverado 1500 (2019–2026) and GMC Sierra 1500 (2019–2026)
• Compatible with Silverado/Sierra 2500HD and 3500HD (2020–2026)
• Designed for Crew Cab and Double Cab rear seat assemblies
• Not intended for single cab or modified under-seat setups

How does the 6-piece kit keep items organized and easy to reach?

The kit combines a molded main organizer, a removable inner bin, and a mesh pocket so you can separate large items from small essentials and access them quickly. The inner bin lifts out for cleaning or transferring gear, while the mesh pocket makes frequently used items visible and within arm’s reach. Mounting hardware secures the system so gear stays put while driving.

• Removable inner bin for sorting and easy cleaning
• Mesh pocket for visible, quick-access storage of small items
• Mounting components keep the system stable under rough roads
• Molded main compartment fits the under-seat cavity for efficient use of space

What materials and durability can I expect?

The organizer is molded from high-strength ABS plastic chosen for its impact resistance and durability in automotive environments. ABS stands up to daily wear, resists moisture, and won’t deform under normal cabin temperatures. The combination of rigid construction and secure mounting reduces rattling and protects stored contents.

• High-strength ABS construction resists impacts and moisture
• Rugged design maintains shape under load
• Secure mounting reduces movement and noise while driving
• Easy-to-clean surfaces for maintenance and spill cleanup

How much more usable storage does this add, and will it affect passenger comfort?

The unit uses otherwise unused space beneath the rear seats to add significant, organized storage without intruding on passenger legroom or cabin space. Because the organizer sits below the seat cushion and is tailored to the truck’s contours, it increases carrying capacity while keeping the rear area comfortable for occupants. Large items can be stowed away safely out of sight, freeing the cab and bed for other uses.

• Expands concealed storage without reducing legroom
• Keeps tools and gear out of sight but within reach
• Prevents loose items from cluttering the cab or cargo bed
• Works with factory seats for a factory-like fit

Who is this for: The Mixsuper Liner Under Seat Storage kit is aimed at Silverado and Sierra owners who need smarter organization—contractors, outdoor enthusiasts, families, and anyone who wants to secure tools, emergency gear, or everyday essentials without sacrificing cabin comfort. If you drive a compatible Crew Cab or Double Cab model and want a durable, removable, and neatly integrated storage solution, this kit was built for you.