This is the under-bed mounting kit ONLY, and it is not a complete hitch. The complete kit is GNRK1020. What is in this box is the under-bed frame and the vehicle specific brackets that bolt it to the truck. The receiver socket, the 2-5/16" gooseneck ball, the 5/8" locking pin and the spring loaded handle are all in the center section, which is the other box and is not included here. To end up with a working hitch you need this part and the GNRC920. B&W ships the Turnoverball as separate boxes, which is why these halves can be bought on their own and are stocked as service parts. That makes this the right listing if you are replacing a damaged or worn half, moving a hitch between trucks of the same make, or completing a two box shipment where one box did not arrive. It is the wrong listing if you are buying a gooseneck hitch for the first time: order GNRK1020 instead. It suits the same trucks as GNRK1020: 2020-2026 Chevrolet & GMC 2500 & 3500 Trucks. Assembled into its complete kit, the hitch is rated 30,000 lb gross trailer weight and 7,500 lb vertical tongue weight with the included 2-5/16" gooseneck ball, and never more than your own truck's tow and weight ratings.
What's Included:
Under-bed mounting frame and crossmember
Vehicle specific side brackets and mounting plates
Frame hardware pack
NOT INCLUDED: the center section (GNRC920) with the receiver socket, 2-5/16" ball, locking pin and latch handle
NOT INCLUDED: this is not a complete hitch. The complete kit is GNRK1020.
Features
Mounting Kit Only, Not a Complete Hitch This is the under-bed mounting kit ONLY, and it is not a complete hitch. The complete kit is GNRK1020. We are saying this first and saying it plainly because it is the one thing that goes wrong when these parts are sold online. The other half is the GNRC920. Buying this alone gets you a frame and brackets with nothing to hitch a trailer to. If you want a hitch, order GNRK1020.
Vehicle Specific Under-Bed Frame and Brackets This is the part of a Turnoverball that is cut for one truck platform. The side plates pick up frame holes that are already in 2020-2026 Chevrolet & GMC 2500 & 3500, the crossmember sits at the right height for that frame, and the receiver opening lands where the bed hole belongs. That is why B&W builds dozens of mounting kits rather than one adjustable set of rails, and why this part number will not transfer to a different truck platform.
Turns Over and Stows in Its Own Socket The Turnoverball behavior this part is named for works the same whichever half you are replacing. Pull the handle in the wheel well toward you and rotate it slightly left to lock the pin out, lift the ball, turn it over and drop it back into the same receiver upside down. The bed goes flat. Rotate or push the handle right and the spring pops the latch back into place, ready to tow.
Rated 30,000 lb gross trailer weight and 7,500 lb vertical tongue weight with the 2-5/16" gooseneck ball Capacity on a gooseneck depends on which ball is in the socket, so the number always carries the ball with it. With the 2-5/16" gooseneck ball supplied in this kit the rating is 30,000 lb gross trailer weight and 7,500 lb vertical tongue weight. If you plan to tow over 30,000 lb, B&W specifies its 3" gooseneck ball, part number GNXA2025, in place of the 2-5/16" ball supplied in this kit. B&W's own position, printed in the Turnoverball owner's manual, is that the hitch is rated to tow what your truck is rated to tow. Look up your truck's GVWR, GCWR and maximum tow rating before you load a trailer, and treat the hitch numbers as a ceiling you work under rather than a target.
Fits the Same Trucks as GNRK1020 This part belongs to GNRK1020, which B&W lists for 2020-2026 Chevrolet & GMC 2500 & 3500 Trucks. Excludes Trucks with CarbonPro Bed Confirm your truck against that kit before ordering, because the fitment of a component is the fitment of its kit.
Made in the USA, Built by B&W in Humboldt, Kansas The hitch is manufactured in B&W's own plant in Humboldt, Kansas, from American steel, by a workforce that owns the company. It is tested to SAE J2638, the gooseneck and fifth wheel standard, with B&W's stricter internal rule that one sample has to pass all three 300,000 cycle dynamic tests and then the six static tests as well. It carries B&W's Lifetime Exclusive Limited Warranty.
Fitment & Compatibility
Years
Make
Model
Bed
2020-2026
Chevrolet/GMC
2500
● Standard
2020-2026
Chevrolet/GMC
3500
● Standard
Fit guidance: This is the under-bed mounting kit ONLY, and it is not a complete hitch. The complete kit is GNRK1020. The fitment below is the fitment of the complete GNRK1020 kit, because a component fits exactly the trucks its kit fits and nothing else. B&W lists GNRK1020 for 2020-2026 Chevrolet & GMC 2500 & 3500 Trucks. Excludes Trucks with CarbonPro Bed Confirm your truck against the complete kit before ordering. B&W's own position, printed in the Turnoverball owner's manual, is that the hitch is rated to tow what your truck is rated to tow. Look up your truck's GVWR, GCWR and maximum tow rating before you load a trailer, and treat the hitch numbers as a ceiling you work under rather than a target.
Specifications
Part Type: Under-Bed Mounting Kit only, not a complete hitch
B&W Part Number: GNRM1020
Complete Kit: GNRK1020
Other Half of the Kit: GNRC920
Series: B&W Turnoverball, under-bed gooseneck
Fits: 2020-2026 Chevrolet & GMC 2500 & 3500 Trucks
Included in This Box: Under-bed frame, vehicle specific side brackets and plates, frame hardware
Not Included: Receiver socket, gooseneck ball, locking pin, latch handle, safety chain u-bolts, all of which are in the center section
Gross Trailer Weight of the Complete Hitch: 30,000 lb with the 2-5/16" ball, and not more than your truck's rating
Vertical Tongue Weight of the Complete Hitch: 7,500 lb with the 2-5/16" ball, and not more than your truck's rating
Finish: Powder coat
Shipping Weight: About 88 lb
B&W In-Kit Carton Weight: About 87 lb
UPC: 843233005301
Country of Origin: USA, built by B&W in Humboldt, Kansas
Warranty: B&W Lifetime Exclusive Limited Warranty
Installation
Type: Service part. It installs as part of a complete B&W Turnoverball, GNRK1020 · Time: About 1 to 3 hours as a replacement, longer as part of a first install · Tools: Socket set and torque wrench; a floor jack or a second person to support the weight · Difficulty: Intermediate, DIY-friendly with normal hand tools
This is the under-bed mounting kit ONLY, and it is not a complete hitch. The complete kit is GNRK1020. There is no standalone installation sheet for this part, and B&W does not publish one, because it is installed as part of its kit. Work from the GNRK1020 installation instructions linked in Resources, which cover the frame brackets this box contains. Torque values and hole locations come from that sheet, not from this page.
Watch the model-specific installation walkthrough:
Resources
Everything you need for your B&W Turnoverball Under-Bed Mounting Kit Only, 2020-2026 Chevrolet & GMC 2500 & 3500, for GNRK1020, in one place.
Warranty. B&W covers this product under its Lifetime Exclusive Limited Warranty. B&W's published terms cover defects in material or workmanship for the original consumer purchaser, for as long as that purchaser owns the product, with B&W choosing to replace the product or, at its option, repair it or refund the purchase price. Installation, removal and shipping costs are not covered, and normal wear, finish aging and damage from accident or misuse fall outside it. A return authorization from B&W is required before sending anything back, on 800-248-6564. B&W does not authorize dealers or distributors to create any other warranty on its products, so the terms above are B&W's own and are described here rather than extended by us.
Free shipping. This item ships free to the lower 48 states. Because it is an oversized item, it ships by freight and typically arrives in 3 to 7 business days.
Inspect on delivery. Please inspect the packaging before signing. If you see any damage, note it on the delivery receipt and contact us right away, and we will make it right.
About B&W Trailer Hitches
B&W Trailer Hitches started in a Humboldt, Kansas garage in 1987, with two men and an idea. Roger Baker and Joe Works, the B and the W, were building custom truck beds when they got tired of the one thing every gooseneck customer complained about: a ball welded permanently into the bed, in the way every day of the year for the few days a year it was actually towing. They designed a hitch that mounted underneath the bed and a ball that turned over and stowed in its own receiver, and the Turnoverball Gooseneck Hitch was born. A few years later the same under-bed mounting system became the single-point Companion fifth wheel hitch, which is why a Turnoverball socket still accepts a Companion today.
Everything B&W sells is still made in Humboldt. Roger retired in 1999, and in 2007 Joe began transferring ownership of the company to its employees, so the roughly 600 people working in the plant today are also its owners. They buy American steel on purpose and say why: the sheet steel comes out of Burns Harbor, Indiana, and the round bar that becomes the gooseneck ball is drawn at a mill in Norfolk, Nebraska, because when the strength of a piece of steel is the only thing between a truck and a loose trailer, B&W wants a mill it can hold to a specification.
Their testing story is worth knowing before you compare hitches on price. SAE J2638 is the performance standard for gooseneck and fifth wheel hitches, and B&W is blunt that it is only a recommended practice, not a legal requirement to sell one. The standard allows a manufacturer to use a fresh sample for each of its nine tests. B&W's own engineering requirement is stricter: a single hitch has to survive all three 300,000 cycle dynamic tests and then still pass the six static tests, because, as their director of engineering puts it, an accident rarely happens when a hitch is brand new, it happens after years of wear from the road.
Prestige Truck is an authorized B&W dealer. Every hitch we ship is new, in the factory carton, and covered by B&W's Lifetime Exclusive Limited Warranty direct from Humboldt.
B&W Turnoverball Maintenance
B&W's maintenance guide for the Turnoverball: greasing the four corners of the square post, keeping the latch spring clean by popping the handle a few times, and freeing a ball that has started to stick.
Relevant to the center section in particular, since that is where every moving part lives.
From Steel To Hitch In 60 Seconds
A timelapse ride through B&W's Humboldt plant as American steel becomes a finished hitch: laser cutting, forming, robotic welding, powder coat and assembly.
Every product B&W sells takes this same route through the same building, built by the employee-owners who stand behind it.
Trailer Tires Matter
What B&W wants every hauler to know about trailer tires: load range, age, and pressure, and how each one changes how a trailer behaves behind your truck.
Tire trouble is the most common roadside failure in towing, and most of it is preventable at the walk-around.
Frequently Asked Questions
Straight answers on specs, fit and support
Is this a complete gooseneck hitch?
No. This listing is the under-bed mounting kit only, part number GNRM1020, and on its own it will not tow anything. It is one of the two boxes that make up a complete B&W Turnoverball. The complete kit is GNRK1020. To build a hitch from parts you also need the GNRC920 center section, which carries the receiver socket, the ball and the latch. If you are buying a hitch rather than replacing or completing one, order the complete kit instead.
Who should buy this part on its own?
Two people. Someone whose center section is fine but whose truck has changed, or whose brackets were damaged or lost, and someone completing a hitch that arrived as two boxes with only one of them delivered. B&W ships the Turnoverball as separate boxes, so the halves are genuinely orderable on their own, but a first time buyer wants the complete kit.
What is in the box?
The under-bed frame and the vehicle specific side brackets and plates, plus the frame hardware. The receiver socket, the gooseneck ball, the 5/8" locking pin and the spring loaded latch handle are not in this box, they are in the center section.
What trucks does it suit?
The same trucks as GNRK1020: 2020-2026 Chevrolet & GMC 2500 & 3500 Trucks Excludes Trucks with CarbonPro Bed
How much can the finished hitch tow?
Assembled into its complete kit and with the 2-5/16" gooseneck ball fitted, the Turnoverball is rated at 30,000 lb gross trailer weight and 7,500 lb vertical tongue weight. Capacity on a gooseneck always belongs to the ball that is in the socket, so that number goes with the 2-5/16" ball and not with any other. B&W's own position, printed in the Turnoverball owner's manual, is that the hitch is rated to tow what your truck is rated to tow. Look up your truck's GVWR, GCWR and maximum tow rating before you load a trailer, and treat the hitch numbers as a ceiling you work under rather than a target.
Why is the weight on this page different from the number B&W prints?
B&W quotes the weight of this part as it sits inside the complete kit, which is about 87 lb. The packed carton it ships in weighs about 88 lb. We publish the shipping weight because that is what turns up on your dock. Both numbers describe the same part.
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