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LUVERNE Grip Step wheel-to-wheel running boards equip your pickup truck for whatever job lies ahead. They offer easier truck bed access, fleet-level safety, a highly rust-free construction and a custom fit for your truck and lifestyle. Grip Step wheel-to-wheel steps are the ideal solution for better truck bed access. Whether you need to reach a truck tool box, ladder rack or some cargo in the truck bed, the wheel-to-wheel steps are extra-long, providing a convenient step up for reaching into the truck bed. Grip Step running boards are also built for hard work, featuring expanded metal treads that offer fleet-approved safety. The open treads ensure maximum traction for your boots -- whether rain or shine -- and they also help keep your truck's interior clean by allowing dirt, snow and debris to pass through the boards. For superior resistance to the elements, Grip Step wheel-to-wheel running boards are made from aluminum alloy. They're strong, lightweight and highly corrosion-resistant. To maximize this corrosion resistance, the running boards and brackets are both shielded in a durable black powder coat finish. The running boards also feature hardened plastic end caps that eliminate sharp corners and add a professional touch. All LUVERNE Grip Step wheel-to-wheel steps are designed for vehicle-specific applications. This ensures a custom fit and the easiest possible installation. The running boards mount with vehicle-specific brackets and use pre-existing mounting points to avoid difficult modifications. This particular set of wheel-to-wheel running boards is designed to fit specific years of the Chevy Silverado 2500 HD or 3500 HD and GMC Sierra 2500 HD or 3500 HD (see application information to verify fitment; brackets included but shipped separately).
Grip Step wheel-to-wheel running boards are designed to be the best running boards for work trucks, featuring a unique expanded metal tread pattern for superior traction and a 7" width for reliable footing.
LUVERNE has manufactured truck accessories in the United States since 1963, specialising in grille guards, running boards, side steps and mud guards for pickups, commercial vans and SUVs. Products are built primarily from stainless steel, aluminium and mild steel, with model-specific mounting kits that use existing frame locations for a bolt-on installation.
LUVERNE has been manufacturing automotive accessories in the United States since 1963, and six decades of continuous production have made it a nationally recognised name in the truck accessory market. Now a Lippert brand, it concentrates on a defined set of products rather than spreading across the whole aftermarket: front-end protection, step access and spray protection for pickup trucks, commercial vans and sport utility vehicles.
Step products are the largest part of the catalog and the range is unusually deep, because the right step depends on the vehicle's ride height, the width of the rocker panel and how often people get in and out. The O-Mega II six-inch oval steps give a wide, flat standing surface in polished stainless or black powder coat, while the Regal 7 seven-inch oval steps go wider still for full-size crew cabs and lifted trucks. The broader running board and side bar range covers round tube, oval and boxed profiles across cab configurations, with treads positioned at the door openings where they are used.
Grille guards protect the front end against impacts, brush and road debris, built in tubular stainless or steel with model-specific brackets that tie into factory frame mounting points. Because the fit is engineered per vehicle, installation is a bolt-on job that does not require drilling or cutting on most applications.
Rounding out the line, LUVERNE mud guards and mud flaps shield rocker panels, paint and following vehicles from stones and road spray, in widths matched to the tyre and fender they sit behind. Material choice runs through everything the brand does: stainless steel where appearance and corrosion resistance matter most, aluminium where weight is the priority, and mild steel with protective coating where strength and value lead. Customers include contractors, fleet operators, van upfitters and truck owners.
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4 compatible vehicles
| Year | Make & Model | Style | Bed | Notes |
|---|---|---|---|---|
| 2015 - 2019 | Chevrolet Silverado 2500 HD | Crew Cab Pickup | 8'2" Bed | — |
| 2015 - 2019 | Chevrolet Silverado 3500 HD | Crew Cab Pickup | 8'2" Bed | — |
| 2015 - 2019 | GMC Sierra 2500 HD | Crew Cab Pickup | 8'2" Bed | — |
| 2015 - 2019 | GMC Sierra 3500 HD | Crew Cab Pickup | 8'2" Bed | — |
The LUVERNE Grip Step 7" x 125" Aluminum W2W Running Boards, Select Silverado, Sierra HD 415125-401747 (Part #FTNF415125-401747) is designed for 8'2" bed trucks. Check the fitment chart for your specific Chevrolet Silverado 2500 HD configuration.
Yes, the LUVERNE Grip Step 7" x 125" Aluminum W2W Running Boards, Select Silverado, Sierra HD 415125-401747 (Part #FTNF415125-401747) is designed to fit the 2015-2019 Chevrolet Silverado 2500 HD.
The LUVERNE Grip Step 7" x 125" Aluminum W2W Running Boards, Select Silverado, Sierra HD 415125-401747 (Part #FTNF415125-401747) fits 2015-2019 Chevrolet Silverado 2500 HD models. The 2019 model year is the last year covered by this part number. For newer models, check for an updated version.
The LUVERNE Grip Step 7" x 125" Aluminum W2W Running Boards, Select Silverado, Sierra HD 415125-401747 (Part #FTNF415125-401747) fits the following vehicles: 2015-2019 Chevrolet Silverado 2500 HD; 2015-2019 Chevrolet Silverado 3500 HD; 2015-2019 GMC Sierra 2500 HD; 2015-2019 GMC Sierra 3500 HD. Always verify your specific year, make, and model before ordering.
The LUVERNE Grip Step 7" x 125" Aluminum W2W Running Boards, Select Silverado, Sierra HD 415125-401747 (Part #FTNF415125-401747) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The CURT 401747 is designed for 2015 and newer GM 2500/3500HD pickups in Regular Cab, Double Cab, and Crew Cab configurations with gas or diesel engines. It uses a body mount application with no drilling required. Verify your truck model year and cab style before purchasing.
Yes. The CURT 401747 is a no-drill application. It attaches to existing factory body mount points and spring hanger bolts without requiring any drilling, cutting, or permanent modifications to the vehicle.
The kit includes: 2 front mounting brackets (LH/RH), 2 front inboard brackets, 2 center mounting brackets (LH/RH), 2 rear mounting brackets (LH/RH), 2 rear inboard brackets, 6 double-ended studs (3/8-16 x 4.0"), 6 rubber cushion washers, 22 flat washers (3/8"), 30 serrated flange nuts (3/8-16), 12 hex head screws (3/8-16), 2 90-degree brackets, 2 spring hanger inboard brackets, 2 spring hanger outboard brackets, 2 hex-head bolts (3/8-16 x 2"), 2 nylon lock nuts (3/8-16), and 4 flat washers (1/2"). See the Service Parts List for complete details and part numbers.
The manual does not specify which tools are required for installation. Contact CURT or your installer to confirm the tools needed.
The manual does not specify whether the battery must be disconnected. Contact CURT or your installer for guidance.
You must remove the factory front, center, and rear body mount bolts. You must also loosen (not remove) the spring hanger bolts on both sides of the vehicle to allow the spring hanger mounting brackets to be positioned behind the bolt flanges.
On the left side, assemble items #1, #3, and #14 using three 3/8"-16 x 1.0" screws (item #13), 3/8" flat washers (item #10), and 3/8" flange nuts (item #11). Torque to 19 lb. ft. Repeat for the right side using the corresponding right-side brackets.
1. On the short threaded end of the stud (item #12), install a 3/8" serrated flange nut (item #11) backwards to the bottom of the thread. 2. Install a 3/8" flat washer (item #10) and rubber cushion washer (item #9) tight against the serrated flange nut. The end of the stud must be recessed in the rubber washer approximately 3/16". 3. On the long threaded end, install a 3/8" serrated flange nut (item #11) backwards to near the bottom of the threads.
Insert the stud from the inboard (frame) side through the lowest hole in the bent flange of the bracket that allows the rubber washer to seat firmly against the side wall of the frame. Install a 3/8" serrated flange nut (item #11) on the outboard end of the stud finger tight only at this stage.
Remove the factory front body mount bolts and install the front mounting bracket (items #1, #3) to the front body mount, leaving fasteners finger tight. Remove the factory center body mount bolts and install the center mounting bracket (item #4) to the center body mount, leaving fasteners finger tight. Note: Center mounting brackets (items #4, #5) are used as rear brackets on Regular Cab models only.
Remove the factory rear body mount bolts and install the rear inboard mounting bracket (item #8) with washer (item #15) to the rear body mount, leaving fasteners finger tight. Then attach the rear outboard mounting bracket (item #6) to the back side (towards the rear of the vehicle) of the rear inboard bracket using three 3/8"-16 x 1.0" screws (item #13), 3/8" flat washers (item #10), and 3/8" flange nuts (item #11). Torque to 19 lb. ft. Note: There is a difference between Double Cab and Crew Cab applications; use the correct holes as shown in the manual figures.
1. Loosen the spring hanger bolt or nut just enough to slide the inboard spring hanger mounting bracket (item #18) behind the flange of the bolt or nut. Position the inboard bracket with the channel open to the outboard side. 2. Install the outboard spring hanger mounting bracket (item #19) so its inboard portion fits inside the channel of the inboard bracket, using a 3/8-16 x 2" bolt (item #16), 3/8" flat washer (item #10), 1/2" flat washer (item #20), and 3/8-16 nylon lock nut (item #17). Leave loose until the step board is in place.
1. Preassemble the front bracket on the left side. 2. Assemble the load reaction studs and hardware. 3. Attach the load reaction stud assemblies to the mounting brackets. 4. Install the front, center, and rear mounting brackets to their respective factory body mount points, leaving fasteners finger tight. 5. Attach the rear outboard bracket to the rear inboard bracket and torque to 19 lb. ft. 6. Install the spring hanger brackets. 7. Install the step boards per their own instructions. 8. Position the load reaction bolt assembly and tighten the flange nuts to 19 lb. ft. 9. Repeat steps 1-8 for the right side.
Most fasteners are left finger tight during initial assembly. The front bracket preassembly (step 2) is torqued to 19 lb. ft. immediately. The rear outboard bracket attachment (step 5.4) is torqued to 19 lb. ft. The spring hanger bolts are left loose until the step board is in place (step 6.2). Final tightening of the load reaction flange nuts occurs after the step board is installed (step 8), torqued to 19 lb. ft. Body mount fasteners must be torqued to manufacturer specifications after the step board is installed.
Torque the front bracket preassembly (3/8"-16 x 1.0" screws with flat washers and flange nuts) to 19 lb. ft. Torque the rear outboard bracket attachment (3/8"-16 x 1.0" screws with flat washers and flange nuts) to 19 lb. ft. Torque the load reaction stud flange nuts to 19 lb. ft. after the step board is installed. Body mount fasteners must be torqued to manufacturer specifications.
The load reaction studs (item #12) are double-ended, 3/8-16 thread, 4.0" long, zinc-plated steel. The short threaded end receives a serrated flange nut backed off to the bottom of the thread, then a flat washer and rubber cushion washer with the stud end recessed approximately 3/16" into the rubber. The long threaded end receives a serrated flange nut backed off to near the bottom of the threads.
The rubber cushion washers (item #9) are 0.354" inner diameter, 1.00" outer diameter, and 0.75" thick. Six are included in the kit. They are installed on the load reaction studs with the stud end recessed approximately 3/16" into the rubber.
Due to excessive thread locker in the body mount bolt area on 2010+ GM Silverado/Sierra, use caution when removing the body mount bolts. This may require extra effort or heat to break the bolts free.
Ensure that the mounting brackets do not touch the inside wall of the body mount housing. This is critical to proper installation and must be verified before torquing the body mount fasteners to manufacturer specifications.
CURT recommends regular inspection and maintenance of the leaf spring attachment point per GM Technical Service Bulletin 09-03-09-001E: Clunking Noise from Rear of Vehicle (Re-torque Leaf Spring Bolts) for 2007-2017 Chevrolet and GMC trucks. Failure to regularly inspect and maintain factory-recommended torque values may result in damage to the vehicle.
Yes. There is a difference between Double Cab and Crew Cab applications for the rear outboard mounting bracket (item #6) attachment. You must use the correct holes as shown in Figures 2 and 3 of the manual for your specific cab style.
Yes. Center mounting brackets (items #4, #5) are used as the rear brackets on Regular Cab models only. On Double Cab and Crew Cab models, separate rear mounting brackets (items #6, #7, #8) are used.
2015+ GM 2500/3500HD pickups in Regular Cab, Double Cab, and Crew Cab configurations with gas or diesel engines.
No. The CURT 401747 is a no-drill application that uses existing factory body mount and spring hanger attachment points.
Torque all 3/8"-16 fastener assemblies to 19 lb. ft. Body mount fasteners must be torqued to manufacturer specifications.
Yes. You must remove the factory front, center, and rear body mount bolts and replace them with the mounting brackets included in the kit.
Most mounting brackets are left finger tight during initial installation. Final torquing to 19 lb. ft. occurs after the step board is installed and positioned correctly.
Regularly inspect and maintain the leaf spring attachment point per GM Technical Service Bulletin 09-03-09-001E. Failure to maintain factory torque values may result in vehicle damage.
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