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  1. Tonneau Cover
  2. Retrax
  3. Retractable - Manual
  4. Low Profile - Top of Bed Rails
  5. Rack Compatible
  6. Hard Plastic
THIS ITEM IS NOT A FIT FOR
2020 GMC Acadia
Retrax

RetraxONE XR Hard Tonneau Cover - Retractable - Polycarbonate - Matte Black - Accessory T-Slots

Part Number: RTX37YR
In Stock
$1,799.99
Retail:$1,849.99
You Save: $50.00
Tonneau Cover
Not Confirmed to Fit

2020 GMC Acadia

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In Use/Installed

Install crossbars (sold separately) in the slotted rails of this long-lasting cover to carry your bikes, kayaks, and more above your bed. Manually operate the cover with the pop-up, locking handle, which gives you the best security for your cargo. Great Prices for the best tonneau cover from Retrax. RetraxONE XR Hard Tonneau Cover - Retractable - Polycarbonate - Matte Black - Accessory T-Slots part number RTX37YR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (34)
  • Q & A (0)
  • Photos

Retrax Tonneau Cover - RTX37YR

Highlights

  • Custom Fit for Your Vehicle: Secures to your truck bed with model-specific clamps and hardware
  • Keeps Gear Secure: Hard polycarbonate cover locks anywhere along rails for theft protection.
  • Hauls More Gear Up Top: Built-in T-slots let you mount racks for bikes, ladders, or kayaks.
  • Smooth, Easy Operation: Sealed ball-bearing rollers glide open or closed without binding.
  • Stays Dry and Clean: Foam seals, weather strips, and drain tubes keep out water and dust.
  • Tough, Long-Lasting Build: UV-resistant Lexan and 5/8" aluminum I-beams hold up to 200 lbs.
Made in USA

Features to know about

Secure Gear in Any Weather: Lockable Polycarbonate Cover

When you need your cargo out of sight and safe from rain, dust, or theft, the RetraxONE XR delivers. Its high-quality polycarbonate (Lexan) cover won’t swell, crack, or fade, even when temperatures swing from -50° to 200°F. A built-in locking handle lets you secure the cover at any point along the rails—close it tight to lock up tools or latch it partway to protect smaller gear while leaving room for long items. With weather stripping and foam seals on every side, moisture stays out and your bed stays clean and dry.

Open pop-up locking handle of RetraxONE XR retractable tonneau cover ready for sliding operation

Close-up of RetraxONE XR pop-up locking handle on driver’s side for manual operation of retractable tonneau cover

Closed locking handle of RetraxONE XR tonneau cover concealed under flat protective lid for security

RetraxONE XR tonneau cover partially open showing latch-in-place capability for adjustable bed access

Close-up of RetraxONE XR bulkhead weather seal preventing water and dust from entering truck bed

Full Bed Use When You Need It: Retractable Manual Design

Some covers make you choose between protection and access. This one gives you both. The sealed ball-bearing rollers glide the cover smoothly into a low-profile canister that sits just 13-1/2" deep by 12" tall, so you can open the entire bed in seconds without removing anything. The spiral track system keeps the slats from rubbing or binding as they retract, so operation stays smooth with no lubrication needed. The angled canister bottom also frees up extra cargo space underneath for smaller gear.

Transparent view of RetraxONE XR retractable tonneau cover rolled into canister showing spiral track system

Angled canister of RetraxONE XR tonneau cover installed at truck bulkhead allowing more cargo space beneath

Truck bed with RetraxONE XR tonneau cover closed and tailgate open showing independent operation

Built to Last: Reinforced Impact-Resistant Construction

The RetraxONE XR is built for years of use in tough conditions. Its 5/8" thick aluminum I-beams are embedded every 4-3/4" inside the Lexan panels for extra strength, supporting up to 200 lbs of evenly distributed weight. The matte black finish resists scratches and UV damage while keeping a clean look that stays cool to the touch on hot days. The low-profile side rails sit only 1" above the bed for a streamlined fit that complements your truck’s lines.

Truck fitted with RetraxONE XR hard matte black tonneau cover showing low-profile attractive design

Flush-mounted RetraxONE XR tonneau cover providing streamlined appearance and tight seal with canister

RetraxONE XR tonneau cover closed above 5th-wheel hitch showing clearance and compatibility

Haul More Above the Bed: Built-In T-Slot Rails

If you run ladders, bikes, kayaks, or rooftop gear, the integrated T-slot rails make it easy to add crossbars or a rack system without interfering with the cover’s movement. The Trax Rail System works with most T-slot accessories from Yakima, Thule, Rhino-Rack, and others, so you can carry extra gear above while keeping the bed covered below. It’s the ideal setup for workdays that turn into weekends outdoors.

RetraxONE XR Trax Rail System with T-slot crossbars carrying bikes above retractable tonneau cover

Simple Setup: No-Drill Clamp Installation

Getting this cover on your truck doesn’t require cutting or drilling. The rails clamp directly onto your bed rails and attach to the preassembled canister with included hardware. Two drain tubes route through existing holes in the bed floor to channel water out of the storage canister, keeping everything inside dry and ready for use. Once clamped down and tightened, you’re ready to haul with a secure, smooth-operating retractable cover built for everyday reliability.

RetraxONE XR drain tube attachment for channeling water from canister through factory bed holes

Two people installing RetraxONE XR tonneau cover by placing assembled canister and rails onto truck bed

Specs

Weight and Capacity

  • Weight capacity: 200 lbs evenly distributed

Dimensions

  • Canister dimensions: 13-1/2" deep x 12" tall

Cross-sectional view of RetraxONE XR tonneau cover showing sealed ball-bearing rollers and polycarbonate slats for smooth retractable operation

Installation diagram showing RetraxONE XR tonneau cover components and rail attachment instructions

Warranty

  • Limited lifetime warranty

T-60484 Retrax RetraxONE XR Hard Bed Cover w/ Trax Rails - Retractable - Lexan - Matte

Installation Details RTX37YR Installation instructions

This Product Fits The Following Vehicles




Ratings & Reviews

4.7

34 reviews
Review sort icon
Install crossbars (sold separately) in the slotted rails of this long-lasting cover to carry your bikes, kayaks, and more above your bed. Manually operate the cover with the pop-up, locking handle, which gives you the best security for your cargo.

by:



by:

Looks good and feels sturdy



by:

Awesome product as it was easy to insta ll!



by:

Still works great. Been outside in the elements for a year. Looks and functions great.



by:

The install is complete. I'd prefer a hard copy of the directions. The little point and shoot QR code took me to the wrong cover. After a little work I did find the correct one. This added a good 30 minutes to the install time. Little trouble with the adjustment. I might have to adjust a little more in the days to come. I'm conservative with the 4 star rating. Time will tell, could move to 5. The MAJOR concern...the delivery company delivered it to the wrong address. Thankfully I have honest neighbors otherwise someone would have been out $[XX].

I'd have a conversation with the delivery company if I were y'all.



by:

Product very good. Drain plugs could fit better keeps popping out



by:

perfect fit. solid build. Fast shipping



by:

Installation went well. Quality workman ship.



by:

E trailer is great. But when the cover arrived and I installed it the cover had a hole in it or a small flaw



by:

I have seen this product on other trucks and liked it. It was fairly easy to install(some good videos on[line]) my son helped me, two people make it go faster and easier. Thanks for the good service and price.



by:

Looks very sharp and fits well on my 2022 Silverado 1500 5'8" bed, and the fits well with Rihno Rack heavy duty crossbars 65" long.



by:

Shipping was fast. Everything arrived in tact.
The instructions for the cover were fairly easy to follow and it fit our 2023 Canyon Denali with a spray in bedliner perfectly.



by:

Works good overall. Opens, closes and locks very well. I get some water coming in on the sides , driving in the rain. Not pleased with the connections on the drain tubes. I have had to glue them in more than once, even during initial install. I did not like the fact that I had to drill those 1/2" holes in the bed for them as well.



by:

The product quality is very good, and I anticipate many years of useful service. Regrettably, the assembly directions are somewhat superficial. Identifying hardware (i.e.: screw size, color, etc.) is particularly challenging as there is not an actual size comparison chart. Properly aligning the product was also very difficult, multiple attempts were required.



by:

Fantastic cover. Perfect for my needs. Performs better than I imagined it would. Ability to access bed instantly with supplies... Yakima rack on/off in literally less than two minutes. Drive a black limited Tacoma. Perfect match for this truck. From sleek to bound for the trails in no time.



by:

Very good quality tonneau cover and it just glides when opening and closing. Installation was super easy too.



by:

Pretty decent cover and installation was reasonable. I’m still not sure how water resistant it will be but we will see. It is replacing a folding cover and thus far it is easier to use. I’ll have to see if it is worth the space trade off but I didn’t like the rear window being blocked when the folding cover was open.



by:

Excellent shipping. No damage. Installation instructions were easy to follow. No complex tools needed. Lightweight product. Easy lifting and maneuvering into position.



by:

etrailer had excellent communication and the cover came in sooner than expected. The Retrax cover was flawless and had excellent instructions for easy installation!



by:

Piece of junk. It ripples in the wind like a tarp over the back of the pickup. The canister does not roll up without having to be forced it in, mostly due to the ripples from driving down the highway. 2 stars because it could work well, the parts and design, if the actual cover were designed for the use it is intended for.



by:

Everybody at etrailer have always provided excellent customer service. Thank You,



by:

So far I have about 10000 miles on this set up and the Retrax cover has been great, love being able to keep prying eyes off my gear and water infiltration has been minimal. This is the plastic version and seems to be holding up fine to the elements thus far…time will tell, there is a slight loss of cargo space with this unit installed but it hasn’t been an issue for me. I am very happy overall to this point.



by:

I spent more time getting the cover aligned than assembling and getting it onto the truck bed rails. The instructions are very good. I had to adjust the top jaws of the all the rail clamps since I have the T-slot XR rail system. I used a thin piece of cardstock to check for unwanted clearance between the jaw and truck bed flange. Since I didn't have a very large drill bit, I used a Dremel sanding bit to enlarge the pilot hole that I drilled through the plastic bed plug for the drain tube. That worked fine. The cover looks great and seems to operate well on this first day of installation and use. The T-slot rails do not get in the way of using the hand-holes for the rear step bumper.



by:

The install was very easy but definitely a two man operation. The section that holds the rolled up cover is pretty large so you do lose some space. That section is also is fairly thin walled. I have dented and scratched it pretty good but it doesn't affect its function. I put one of those cargo load bars across the bed in front of it to try and stop that. I did have it "rack" a little after some rough drives which can cause it to bind a bit when rolling up. But it always closed on the second or third try. And its easy to straighten up again if needed. No water has gotten in the bed and it sure makes grocery getting a whole lot easier. I think its great.



by:

Great accessory for our F-150. Installation isn't too bad if you just take it slow and double-check everything as you go. Looks are top-notch, and the functionality has been excellent. Gives us an extra sense of security being able to lock the cover when needed. You lose a small amount of bed space, but so far it hasn't caused any problems for us. Did I mention it looks great?


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See what our Experts say about this Retrax Tonneau Cover

  • Comparing A JackRabbit And RetraxONE Tonneau Cover For A 2022 Chevy Silverado 2500
    Hey Clint, The RetraxONE MX # RTX66VR does have the latch on the driver's side that you'll need to flip up before being able to slide the cover. This feature does mean a bit more leg work than the Pace Edwards JackRabbit # PE26CV, but you'll be able to stop the cover at any point in the rails. The JackRabbit will only allow you to stop the cover in 12" intervals. With you having a short bed a tri-fold cover would likely either block you coupling up to a trailer or have to be folded...
    view full answer...
  • Fifth Wheel Hitch and Retractable Tonneau Cover for 2024 Chevy Silverado 2500 Short Bed
    Hey Dale, for your 2024 Chevy Silverado 2500 short bed with the OEM pucks we have the B and W Companion Slider part # BWRVK3775 which would be an excellent option. It's a slider hitch like you are wanting to help with turning clearance, is one of the nicest hitches you can get, and also since it's handle doesn't point up it can fit underneath a tonneau cover as well like the RetraxONE XR part # RTX37YR. I am assuming your truck has the OEM pucks in the bed but if you do not have them you'd...
    view full answer...
  • Recommendation for Best Tonneau Cover On a 2024 Chevrolet Silverado 2500 Short Bed
    I recommend the RetraxONE XR Hard Tonneau Cover # RTX37YR as the best option for your 2024 Chevrolet Silverado 2500HD short bed. This tonneau cover uses matte black polycarbonate slats which won't fade from UV rays and are scratch resistant. The cover can be locked in any position along the rails for carrying odd shaped loads. It also has t-slots in the bed rails which will allow you to use a Ladder Rack # Y01151-5855 or Bed Rack # Y01152-5855 to haul additional gear.
    view full answer...
  • Best Tonneau Cover For a 2024 GMC Sierra 2500HD Short Bed
    I recommend the RetraxONE XR Hard Tonneau Cover # RTX37YR as the best option for your 2024 GMC Sierra 2500HD short bed. This tonneau cover uses matte black polycarbonate slats which won't fade from UV rays and are scratch resistant. It also has t-slots in the bed rails which will allow you to use a Ladder Rack # Y01151-5855 or Bed Rack # Y01152-5855 to haul additional gear.
    view full answer...
  • Replacement Side Rails for Retrax XR Tonneau for 2024 GMC Sierra 2500 Short Bed
    Hey Todd, since the correct Retrax XR for your 2024 GMC Sierra 2500 short bed is the part # RTX37YR the correct replacement side rails is the part # RTX75QR.
    view full answer...
  • Recommended Ladder Rack and Tonneau Cover for a 2021 Chevrolet Silverado 2500
    Hey Duane, for your 2021 Chevrolet Silverado 2500 I recommend going with the RetraxONE XR Hard Tonneau Cover # RTX37YR. This tonneau cover has built in t-slots on the rails so you can install a ladder rack like the Thule TracRac SR Sliding Truck Bed Ladder Rack # TH94RE, is made in the USA, and has an easy no drill install.
    view full answer...
  • Recommendation for Best Tonneau Cover On a 2024 Chevrolet Silverado 3500 Short Bed
    I recommend the RetraxONE XR Hard Tonneau Cover # RTX37YR as the best option for your 2024 Chevrolet Silverado 3500 short bed. This tonneau cover uses matte black polycarbonate slats which won't fade from UV rays and are scratch resistant. The cover can be locked in any position along the rails for carrying odd shaped loads. It also has t-slots in the bed rails which will allow you to use a Ladder Rack # Y01151-5855 or Bed Rack # Y01152-5855 to haul additional gear.
    view full answer...
  • Best Tonneau Cover Recommendation For a 2024 GMC Sierra 3500 Short Bed
    I recommend the RetraxONE XR Hard Tonneau Cover # RTX37YR as the best option for your 2024 GMC Sierra 3500 short bed. This tonneau cover uses matte black polycarbonate slats which won't fade from UV rays and are scratch resistant. The cover can be locked in any position along the rails for carrying odd shaped loads. It also has t-slots in the bed rails which will allow you to use a Ladder Rack # Y01151-5855 or Bed Rack # Y01152-5855 to haul additional gear.
    view full answer...

Do you have a question about this Tonneau Cover?


Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Matthew S
Written by:
Matthew S
Employee Daron K
Edited by:
Daron K

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