Shop By Category

Find what you need fast

 Loading... Please wait...
Fast, FREE shipping on EVERYTHING, most orders ship same or next business day.

  • Thule 6298B - Motion XT - 18 Cubic Foot Cargo Box on Toyota Sienna
  • Thule 6298B - Motion XT - 18 Cubic Foot Cargo Box on Toyota Sienna

    In Store or Ready to Ship!
    Free Shipping

    Product Description

    Motion XT Manual [+] Comparison Chart [+] Hatch Clearance Chart [+]

    This is a fit for the 2015+ GMC Yukon Denali (check guide for other years) with factory installed side rail and preinstalled roof rack crossbars.  We've outfitted this vehicle with the Thule Motion XT XL (extra large, 18 cubic foot) rooftop cargo box.

    The design improvements start with the unique angular, yet aerodynamic shape, it is constructed with durable, lightweight thermoformed ABS plastic.  This is an automotive grade plastic, a material commonly used for the manufacture of automobile exterior components such as rearview mirrors, with a similar gel-coat automotive grade gloss finish.  Care for the finish as you would the vehicle using soft sponges, microfibers, and sudsy water, but no automatic carwashes.   

    The front of the box is smooth with no belt line found on other boxes, this reduces frontal area turbulence.  The angular high and low areas of the lid are modern in design but also act to stiffen the lid with little to no added weight, this compared to other designs which use extra internal bracing for stiffness adding a material weight penalty.

    The Motion XT series boxes are strong with a 165-pound carrying capacity, most other boxes are rated to 110 pounds.  This is 55-pounds extra weight capacity, that's 33% greater than what most other boxes are rated to carry.  The added strength can be attributed in large part to the steel reinforcements in the base which encompasses the mounting hardware, an area where high stresses occur.

    The lid to base overlap at the front of the box is greater than any other box, eliminating the possibility of "fish mouthing", this is an aerodynamic occurrence when air forces separation between the lid and base. No other manufacturer has engineered such a targeted solution to this phenomenon as effectively and elegantly.

    The SlideLock system, with separate locking and opening functions, automatically locks the lid in place and indicates when the box is closed securely.  The lock mechanism is mechanically separate from the lid release, this removes the relatively fragile key from the work of activating the release linkage.       

    The crossbar mounting hardware has extra wide crossbar attachments to accommodate a wide range of crossbar shapes and sizes.  The smooth turning, rubberized knob tightens the hardware and clicks when fully tight.  This click function ensures that the hardware is not over, or under tightened to the crossbar.

    The dual-sided opening lid allows for easy opening and closing from either the passenger or driver side of the vehicle.  The grip-friendly outer handles allow for easy lifting and lowering of the lid in all conditions with the added support of the dual force lid-lifters.

    The Motion XT boxes have been thoughtfully designed to provide the best possible clearance for the vehicle's rear hatch, spoiler, and antenna.  The three primary sizes; L, XL, and  XXL match up well to proportionate vehicle sizes, here are examples:

    • L fits the Subaru Outback Wagon, the Toyota Rav 4, the Honda CRV, the Ford Edge, the Audi Q5 and Nissan Rogue. 
    • XL fits the Honda Pilot, the Toyota Highlander, Land Rover Discovery Sport, the Infiniti QX60 and Mercedes-Benz GLE.
    • XXL fits the Lexus LX, the Toyota Sequoia, the Chevrolet Suburban, the Ford Expedition, the Infiniti QX80, the Nissan Armada,   
    • Alpine is a specialty box primarily for skis with proportions similar to the Motion XXL but with a very low 13.25-inch profile.

    Use the manual link below for technical details, the comparison chart for dimensions and model comparisons and hatch clearance chart for fit information.

    Motion XT Manual [+] Comparison Chart [+] Hatch Clearance Chart [+]

    Delivery Information

    1. Delivery is by freight truck; delivery location must be freight truck accessible.
    2. Shipments to verified physical addresses in the contiguous USA only.
    3. Product ships directly from the manufacturer via best carrier determined based on delivery address.
    4. Ship dates and transit times are estimates; allow up to 14 business day delivery time.
    5. Tracking information is emailed on the day of shipment and delivery should be monitored online.
    6. Recipient must be available on the delivery day to inspect, accept and sign for the delivery.
    7. Prior to signing, inspect contents. If damage is found, immediately refuse delivery and contact Rack Outfitters.
    8. Refusal for any reason other than damage will result in additional charges that are TBD.
    9. Delivery is curb service, the carrier is not responsible for disposal of shipping box or packaging.
    10. Once accepted from the carrier, the sale is final, no returns, refunds, credits or exchanges.
    11. Rack Outfitters facilitates warranty claims according to the manufacturer's warranty guidelines.
    12. Orders in processing cannot be canceled. Please thoroughly read the above information prior to ordering.

    Product Videos

    Toyota Sienna with Thule Motion XT XL Roof Top Cargo Box 02:26

    Buy Here: We upload hundreds of AD FREE videos to help make your rack shopping easy...we want to make your PURCHASE easy too! Use this link to CHECKOUT fast: TRUSTWORTHY TRANSACTIONS - Top-Rated Internet Retailer Since 2002 - Check out with PayPal or our 100% SECURE checkout. - Get FREE shipping on EVERYTHING (contiguous USA) - No SALES TAX on ANYTHING (outside of Texas) - 30 DAY RETURNS and NO RETURN FEES (others charge 10-20%) - PLUS the LOWEST PRICING allowed EVERY DAY. QUESTIONS: Our live, Austin-based experts can help. - Email: - Phone Hours: 10AM-6PM CT Mon-Sat - Austin: 512-441-RACK (7225) - Toll-Free: 866-441-RACK (7225) LOCATION: HQ, Retail/Main Warehouse Rack Outfitters 6006 E Ben White Blvd Suite 300 Austin, TX 78741 FaceBook: YouTube: Twitter: BlogSpot: Instagram:

    • Toyota Sienna ...
      Buy Here:

    Back to Top

    Ask An Expert Ask An Expert close

    Need equipment advice?
    Ask our experts! 1300 BRAVIS

    Thank you. We've received your feedback and will respond shortly Close

    ask an Expert Close

    Let our rack specialists help get you outfitted

    We’ll follow up with you via email or phone, usually the same or next business day.

    The perfect fit starts with vehicle details

    Vehicle Details:
    Any additional VEHICLE details that my apply?

    What do you want to carry?

    Off Road
    Any additional GEAR details that may apply?

    Where on the vehicle do you want to carry your gear?

    Factory Crossbars
    Aftermarket Crossbars
    Truck Bed
    2" Hitch
    1-1/4" Hitch
    Spare Tire

    Special conditions for us to consider

    Any concerns of loading, transporting or securing gear on the vehicle?

    Your contact information