$6,000 Giveaway! Enter Now>

TruckBoss USA Expandable Bed Deck System; 8.50-Foot (99-26 Sierra 1500 w/ 8-Foot Long Box)

Find parts that fit my vehicle Item S585597
Shop Owners Save More! Sign up for our dealer program

    Product Information

    Description, Q&A, Specs & Installation

    Features & Specs

    Description

    TruckBoss 8.5′ XL Deck – Built for Bigger Machines
    For those hauling longer UTVs, the TruckBoss 8.5′ XL Deck is the ultimate solution. Designed specifically for 8′ long-bed trucks, this fixed-side, 109″ all-aluminum deck extends 6 inches beyond the tailgate, giving you the extra length needed for full-size UTVs and larger machines. With dry, secure under-deck storage and 100% extruded aluminum construction, it’s built for strength, durability, and all-season reliability. If you need more deck, more capability, and more hauling power, the TruckBoss 8.5′ XL delivers.

    🛠️ TruckBoss Aluminum Truck Bed Deck – Flatbed with Storage
    🚚 Modular Truck Bed System for Work and Play
    The TruckBoss Aluminum Truck Bed Deck is a modular flatbed system designed for serious hauling. Whether you’re transporting snowmobiles, UTVs, motorcycles, or jobsite gear, this all-aluminum deck turns your truck into a high-capacity, all-season hauling machine. With unmatched storage, year-round versatility, and full compatibility with our accessories, the TruckBoss Aluminum Truck Bed Deck delivers everything you need.

    ✅ Built for Pros, Riders, and Everyone in Between
    The TruckBoss Aluminum Truck Bed Deck adapts to your lifestyle. Need secure tool storage? Dry space for your gear? Room to load a snowmobile, UTV, or motorcycle? With multiple sizes and accessory options, TruckBoss lets you haul smarter—without compromise.

    ✅ Compatible with 5′, 6.5′ and 8’+ truck beds
    ✅ Supports up to 2,000 lbs payload
    ✅ Works with snowmobiles, UTVs, motorcycles, and more
    ✅ Modular accessories: FlexxLoader, PackBoxxes, ramps, winches

    🔐 More Than a Sled Deck
    The TruckBoss Aluminum Truck Bed Deck isn’t just for powersports. It’s designed for:

    🛠️ Contractors who need deck space and lockable storage
    🚨 First responders with mission-ready gear requirements
    🌄 Overlanders building full-feature adventure rigs
    🏍️ Riders who need versatility year-round

    With optional PackBoxxes, you get up to 2.5x more dry, secure storage than a traditional service body—without sacrificing loading space.

    💡 Key Features
    🔩 100% Extruded Aluminum – Lightweight, rust-free, and built to last
    📦 Flatbed with Storage – Up to 2.5x more dry storage with PackBoxxes
    ⚙️ Modular & Scalable – Add ramps, FlexxLoader, winch kits, clamps, and more
    🧰 Easy Loading – Compatible with Fat and Skinny Ramps, Push-Back System
    Made in the USA – Built by TruckBoss in Oregon

    📐 Technical Specs
    📏 5′, 6.5′ and 8′ truck bed fitment
    🪶 Max payload: 2,000 lbs
    ⚖️ Deck weight: ~460–520 lbs depending on size
    🔧 Materials: .125″ extruded aluminum deck + frame

    ✅ Real-World Uses
    ✅ Haul snowmobiles in winter, then swap to motorcycles in summer
    ✅ Load Sea-Doo Fish Pros or Explorer Pros while towing a camper
    ✅ Use SmartBoxx to store and access tools for electrical, plumbing, or field service jobs
    ✅ Transport hunting gear, coolers, and generators to remote basecamps
    ✅ Add ramps and use it to load dirt bikes, ATVs, or heavy equipment
    ✅ Mount tool chests and use it as a mobile workstation
    ✅ Keep recovery gear, jacks, straps, or spare parts dry and ready year-round

    ✅ Compatibility
    ✅ Fits most full-size and mid-size pickup trucks
    ✅ Standard and XL sizes available
    ✅ No drilling needed — installs and removes quickly
    ✅ Pairs with:

    Motorcycle FlexxLoader
    PWC loaders
    SmartBoxx drawers
    Buggy kits
    Winch & ramp kits

    ⚠️ Not sure which size or accessories you need? Reach out — we’ll build the perfect truck bed system for your exact setup.

    🧰 Built to Adapt. Ready for More.
    The TruckBoss Deck System doesn’t just protect your cargo — it unlocks the full potential of your truck. From backcountry adventures to jobsite readiness, this decked storage platform gives you the dry storage, hauling flexibility, and towing capability your truck deserves.

    📢 Ready t

    TruckBoss USA 6016

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    Questions & Answers

    No questions about this product yet. Ask the First Question

    Will It Fit My Sierra 1500

    • 2.7L I4 - 19, 20, 21, 22, 23, 24, 25, 26
    • 4.3L V6 - 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21
    • 4.8L V8 - 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13
    • 5.3L V8 - 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26
    • 6.0L V8 - 04, 05, 06, 07, 08, 09
    • 6.2L V8 - 09, 10, 11, 12, 13