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2020 - 2025 Chevrolet Silverado 2500 HD
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2020 - 2025 Chevrolet Silverado 3500 HD
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2020 - 2025 GMC Sierra 2500 HD
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2020 - 2025 GMC Sierra 3500 HD
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Reese has designed towing equipment since 1952 and remains a benchmark for heavy-duty towing. The line covers fifth wheel hitches such as the modular M5, gooseneck couplers including the Goose Box, air-ride and short-bed pin boxes, weight distribution systems with active sway control, and the accessories that connect them, all built to exceed published industry standards.
Reese has been pioneering towing performance since 1952, when Margaret Reese asked her husband TJ to stop travel trailers rocking every time somebody walked through them. His answer, the first pair of stabilising jacks, was simple and effective enough to change the RV industry. From that starting point Reese grew into a designer and manufacturer of complete towing systems, and today it anchors the heavy-duty end of the Horizon Global towing portfolio.
Fifth wheel towing is where the brand's engineering is most visible. The M5 fifth wheel hitch uses a modular design that breaks into manageable sections for assembly, with a wider stance, tighter tolerances and a shock absorption system aimed at the jolts that travel up through a truck bed. For owners who would rather tow from a gooseneck coupler and keep the bed clear, the Goose Box 20K replaces the trailer's king pin with a gooseneck connection carrying its own air-ride cushioning.
Pin boxes are a Reese speciality. The 5th Airborne uses air-ride technology to dampen road shock and reduce the chucking motion that makes fifth wheel towing tiring, while the Sidewinder was designed for short-bed pickups, pivoting the connection point so the trailer can turn sharply without the front cap meeting the cab.
For conventional towing, Reese weight distribution systems restore load to the tow vehicle's front axle and control sway. The Pro Round Bar distributes weight evenly while damping sway, and the Pro Dual Cam II uses active cam-based sway control that works harder the stronger the sway force becomes. Complete kits pair bars, head and shank to a rated tongue weight, and dedicated sway control kits can be added to existing setups. The products suit RV owners, horse and livestock haulers and anyone towing near the upper end of a vehicle's rating.
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4 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2020 - 2025 | Chevrolet Silverado 2500 HD | Fifth Wheel Trailer Hitch Rail Kit Drilling Required Install Time is 120 minutes |
| 2020 - 2025 | Chevrolet Silverado 3500 HD | Fifth Wheel Trailer Hitch Rail Kit Drilling Required Install Time is 120 minutes |
| 2020 - 2025 | GMC Sierra 2500 HD | Fifth Wheel Trailer Hitch Rail Kit Drilling Required Install Time is 120 minutes |
| 2020 - 2025 | GMC Sierra 3500 HD | Fifth Wheel Trailer Hitch Rail Kit Drilling Required Install Time is 120 minutes |
The Reese Elite Series Fifth Wheel Hitch Mounting System Rail Kit, GM (Part #RE30951) fits the following vehicles: 2020-2025 Chevrolet Silverado 2500 HD; 2020-2025 Chevrolet Silverado 3500 HD; 2020-2025 GMC Sierra 2500 HD; 2020-2025 GMC Sierra 3500 HD. Always verify your specific year, make, and model before ordering.
Yes, the Reese Elite Series Fifth Wheel Hitch Mounting System Rail Kit, GM (Part #RE30951) is designed to fit the 2020-2025 Chevrolet Silverado 2500 HD.
The Reese Elite Series Fifth Wheel Hitch Mounting System Rail Kit, GM (Part #RE30951) fits 2020-2025 Chevrolet Silverado 2500 HD models. The 2025 model year is the last year covered by this part number. For newer models, check for an updated version.
The Reese Elite Series Fifth Wheel Hitch Mounting System Rail Kit, GM (Part #RE30951) Drilling is required for installation. Basic hand tools are typically all you need.
The 30951 is designed for MY20+ GMC and Chevrolet 2500/3500 pickup trucks with either 6.5 ft or 8 ft beds. Before purchasing, visit www.ReeseProducts.com to verify your specific year and trim level are supported, as application varies by model year and trim.
Yes. The 30951 accommodates three frame configurations: trucks without helper spring brackets, trucks with helper spring brackets, and trucks without helper spring brackets but with threaded inserts inside the frame. Each configuration uses different hardware and installation steps. Identify your truck's frame type before installation—see page 2 for the three configurations and their corresponding installation instructions.
No. The manual requires complete pickup bed removal as the first step. The bed must be removed to access the frame for bracket installation and to drill mounting holes in the bed floor. Four people are recommended for this task. The bed should be supported on stands, 4x4s, or similar supports—do not set it directly on the ground to avoid damage.
Required tools include: wrenches and sockets in 3/4", 12mm, 18mm, 19mm, and 22mm sizes; a 1/8" pilot drill bit; a 3" hole saw; a 3.5" hole saw; a drill; a center punch; a hammer; a measuring tape; a torque wrench; a ratchet; socket extensions; and tin snips. A drill press or stable drilling setup is recommended for accurate hole placement in the bed floor.
The kit includes: four frame brackets (driver and passenger side, front and rear); eight M14×2.0×45 CL10.9 hex bolts; eight 5/8" conical washers; eight ½"-13×1.75" GR8 carriage bolts; eight ¼"×1"×3" blocks; eight ½" pull-wires; eight M12×1.25×40 CL10.9 hex bolts; eight M12×1.25 CL10.9 nuts; four M12×1.75×70 hex bolts (for specific frame configurations); six ¼"×1"×2" spacer blocks; sixteen ½" conical washers; eight ½"-13 GR8 nuts; and one mounting structure weldment. Hardware varies slightly by frame configuration.
The manual does not specify whether battery disconnection is required. However, you must disconnect all tail-gate and tail-light wiring by the spare tire before removing the pickup bed. Consult the vehicle service manual or contact the manufacturer if you have concerns about electrical safety during installation.
No. Plastic bed liner inserts cannot be reinstalled after the 30951 mounting kit is installed. Spray-on bed liners are acceptable and can remain in place.
Before removing the pickup bed, remove the fuel filler cap(s) and the filler tube retaining clips or screws, then position the filler tube down and out of the bed. After the bed is reinstalled, reinstall the fuel filler pipe in its original position.
The brake line support clip is a factory clip that holds the brake line to the inner truck frame. You must pry it out of the inner truck frame before installing the underbed mounting system to prevent the brake lines from being damaged by slight contact during installation. After installation is complete, the clip should be repositioned or replaced to protect the brake lines.
Use chalk to mark the centerline of the bed (side to side). For 6.5 ft beds, measure 36-1/16" forward of the rearmost edge of the truck floor and mark a perpendicular line. For 8 ft beds, measure 37-5/16" forward. Measure 15" outward in both directions along this line to mark two rear 5th wheel mount locations. Measure 9.25" forward of this line and mark the gooseneck center receiver location. Measure 13" forward and mark another perpendicular line, then measure 15" outward in both directions for two front 5th wheel mount locations. Drill 1/8" pilot holes first at all five locations, verify alignment with Figure 15, then drill four 3" holes for the 5th wheel mounts and one 3.5" hole for the gooseneck receiver.
Yes. Five holes must be drilled in the pickup bed floor: four 3-inch holes for the 5th wheel mounts and one 3.5-inch hole for the gooseneck receiver. The manual requires drilling 1/8" pilot holes first at all five locations to verify alignment before drilling the larger holes. Deburr the rough edges and apply corrosion preventative to the raw edges after drilling.
Factory heat shields may need to be trimmed and/or have some bolts removed to allow access to mounting holes. Leave as much of the heat shield intact as possible to maintain protection.
Tighten fasteners in this order: (1) All M14 bolts to 148 ft-lb (201 Nm); (2) All M12 bolts to 100 ft-lb (135 Nm); (3) Frame bracket ½" carriage bolts to 110 ft-lb (149 Nm). A torque wrench is required. Periodically check and re-torque all hitch fasteners after installation.
All M14 bolts (item 5) must be tightened to 148 ft-lb (201 Nm). These bolts secure the underbed mounting rail to the frame.
All M12 bolts (item 11) must be tightened to 100 ft-lb (135 Nm). These bolts connect the underbed mount to the side frame brackets.
All ½"-13×1.75" GR8 carriage bolts (item 7) that secure the frame brackets must be tightened to 110 ft-lb (149 Nm).
The installation sequence is: (1) Remove pickup bed and disconnect wiring; (2) Install frame brackets (front and rear, driver and passenger side) loosely; (3) Install carriage bolts and blocks using pull-wires; (4) Install underbed mounting rail with M14 bolts; (5) Install M12 bolts between underbed mount and frame brackets; (6) Prepare pickup bed by marking and drilling five holes; (7) Reinstall pickup bed; (8) Tighten all fasteners in the specified torque sequence. The manual provides different steps for trucks with helper spring brackets or threaded inserts.
For trucks with helper spring brackets: (1) Remove the front helper spring brackets by removing M12 bolts one at a time; (2) Loosely position the front frame brackets against the frame; (3) Place the helper spring bracket back on top and reinstall the factory M12 bolts with a ½" conical washer, or use the supplied M12×1.75×70 hex bolts with a ½" conical washer and a 1"×2" spacer block on the front bolt. (4) For rear brackets, remove the rear helper spring brackets, fish the carriage bolts and blocks from inside first, place two 1"×2" spacer blocks on the rear two bolts, then position the frame brackets followed by the helper spring brackets, and secure with the factory M12 bolts or supplied M12×1.75×70 bolts. Pay close attention during tightening as the fuel tank is close to the inside of the truck frame.
For trucks with threaded inserts inside the frame but no helper spring brackets: (1) Loosely position the front frame brackets against the frame; (2) Use the supplied M12×1.75×70 hex bolts with ½" conical washers to secure the front brackets from outside. Attach a 1"×2" spacer block on the front bolt. (3) For rear brackets, follow the standard installation steps but use the supplied M12×1.75×70 hex bolts with ½" conical washers instead of factory bolts. Pay close attention during tightening as the fuel tank is close to the inside of the truck frame.
The two ½" pull-wires (item 14) are used to guide the ½"×1.75" carriage bolts (item 7) and 1"×3" blocks (item 8) through the frame slots during front and rear bracket installation. The pull-wires are inserted through the slot from inside the frame and come out through the bolt holes. Both pull-wires are kept on the bolt until the bracket is fully installed, then the conical washer and nut are secured.
For 6.5 ft beds, use the second set of twin holes on each rail (Figure 13). For 8 ft beds, use the first set of holes (Figure 14). Selecting the correct mounting holes is critical—using the wrong holes will result in interference with bed cross-sills. For 6.5 ft beds, the front hole and middle slot on side frame brackets are mounted to the underbed mount rail. For 8 ft beds, the middle slot and rear holes are mounted to the rail.
The front of the mounting structure weldment is identified by the gooseneck receiver, which is closest to the front 5th wheel pucks.
After reinstalling the pickup bed, perform these checks: (1) Ensure locating bolts are properly installed to both the pickup frame and bed to prevent misalignment; (2) Tighten all 8 bed mounting bolts; (3) Reinstall the fuel filler pipe and urea filler pipe (if equipped); (4) Reconnect all tail-gate and tail-light wiring by the spare tire; (5) From inside the bed, inspect the mounting system hitch for proper puck placement—puck grooves should sit above the drilled holes; (6) Clean any debris from the bed; (7) Check vehicle exterior lighting for proper operation.
From inside the pickup bed, inspect the mounting system hitch for proper puck placement. The puck grooves should sit above the drilled holes. This is a critical check to ensure the 5th wheel receiver is properly aligned before use.
Periodically check and re-torque all hitch fasteners. The manual does not specify an exact interval, but recommends regular inspection. After initial installation, check fasteners after the first few towing trips and then at regular maintenance intervals.
The 30951 does not have its own towing capacity rating. You must not exceed the lower of: (1) your vehicle manufacturer's recommended towing capacity, or (2) the lowest rated component of your complete towing system. The manual emphasizes that under no circumstances should the vehicle manufacturer's recommended towing capacity be exceeded.
Before installing the hitch, check for adequate clearance between the trailer and the rear of the cab and the rear of the truck box. This ensures the trailer will not contact the vehicle during towing.
All trucks have fuel lines, brake lines, and electrical wiring located along the vehicle frame where the 30951 installs. Carefully examine the location of these systems before installation and be certain not to damage them when positioning hitch components. Be careful when drilling holes, cutting sheet metal, and tightening fasteners to avoid limiting the integrity of these critical systems.
When installing M12 hex bolts to secure the front frame brackets, the fuel tank is close to the inside of the truck frame. Pay close attention during tightening to avoid damaging the fuel tank or fuel lines. This is especially important for trucks with helper spring brackets or threaded inserts.
Yes, the 30951 Elite Series Under-Bed Mounting System is designed for MY20+ GMC and Chevrolet 2500/3500 pickup trucks with 6.5 ft or 8 ft beds. Verify your specific year and trim level at www.ReeseProducts.com before purchasing.
You need: wrenches and sockets (3/4", 12mm, 18mm, 19mm, 22mm), a 1/8" pilot drill bit, 3" and 3.5" hole saws, a drill, center punch, hammer, measuring tape, torque wrench, ratchet, socket extensions, and tin snips.
Yes. The pickup bed must be completely removed. Four people are recommended for this task. The bed should be supported on stands or 4x4s—do not set it directly on the ground.
Tighten in this order: M14 bolts to 148 ft-lb (201 Nm), M12 bolts to 100 ft-lb (135 Nm), and ½" carriage bolts to 110 ft-lb (149 Nm). Use a torque wrench and periodically re-torque all fasteners.
Verify that puck grooves sit above the drilled holes, check that all 8 bed mounting bolts are tight, reconnect all wiring, clean debris from the bed, and verify exterior lighting works properly.
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