OEM 2020–2025 GMC Sierra and Chevy Silverado 2500/3500 Denali Crew Cab Running Boards

OEM 2020–2025 GMC Sierra and Chevy Silverado 2500/3500 Denali Crew Cab Running Boards

Product Highlights

Heavy-duty trucks sit high off the ground. That step height is manageable for most drivers on a daily basis but it becomes a real consideration for passengers, family members, and anyone stepping up into the cab multiple times throughout a work day. GMC Sierra running boards and Silverado running boards address that step height directly while protecting the rocker panels from road debris, mud, and gravel that the rear tires throw up during daily use. For HD truck owners who spend time on job sites, work ranches, or simply use their truck as a family vehicle, factory running boards make the truck genuinely more livable without affecting its capability.

OEM GMC Sierra running boards sourced from verified donor trucks provide the factory mounting geometry, step surface finish, and bracket configuration that the receiving truck was built around. The step surface texture, end cap design, and bracket profile on a factory running board match the original installation in ways that aftermarket alternatives consistently fall short of replicating at close range. For Denali-trimmed trucks where interior and exterior finish quality defines the ownership experience, factory OEM components maintain that standard in a way that universal-fit alternatives do not.

At McClain Auto Part, we source 2020 through 2025 GM HD running boards from verified donor trucks and confirm the cab configuration and trim level before listing. Condition details and photos are available before you commit to a purchase.

Product Overview

This listing covers OEM running board assemblies sourced from 2020 through 2025 GMC Sierra 2500HD, Sierra 3500HD, Chevrolet Silverado 2500HD, and Silverado 3500HD Crew Cab donor trucks. The running boards in this listing reflect the Denali and comparable premium trim level configurations from the donor vehicles.

Crew Cab running boards on these platforms run the full length of the Crew Cab door sill from the front door leading edge to the rear door trailing edge. This full-length coverage provides a step surface accessible at both the front and rear door positions. That coverage matters on a Crew Cab HD truck where rear passenger access is part of the daily use pattern.

The OEM Silverado running boards and OEM Sierra running boards in this listing are direct replacement assemblies. They include the step surface, end caps, and mounting provisions as they came off the donor vehicle. Direct replacement design means the factory mounting points on the receiving truck align with the donor board mounting provisions without bracket modification or clip adaptation.

Fitment and Compatibility

GM HD running board fitment requires confirming several variables before ordering.

Platform and Model Year

The 2020 through 2025 GMT1 generation covers both the GMC Sierra 2500HD and 3500HD and the Chevrolet Silverado 2500HD and 3500HD. The Sierra and Silverado share the same running board mounting provisions within this generation. A running board from a Sierra 2500 donor fits a Silverado 2500 in the same cab configuration and trim level within the same generation. Confirm your specific model year within the 2020 through 2025 window before ordering.

Crew Cab Configuration

These running boards are sourced from Crew Cab donor trucks. The Crew Cab running board length and bracket spacing are specific to the Crew Cab body style. They do not fit Double Cab or Regular Cab configurations. Confirm your cab style before ordering.

Sierra 2500 and Sierra 3500 Compatibility

Sierra 2500 running boards and Sierra 3500 running boards use the same mounting configuration within the same cab style and trim level on this generation. The front-to-rear step length is consistent across both payload ratings within the Crew Cab body style. Confirm your trim level and cab configuration rather than focusing on the payload rating when ordering.

Silverado 2500 and Silverado 3500 Compatibility

Silverado 2500 running boards and Silverado 3500 running boards follow the same fitment pattern as the Sierra HD within this generation. The shared platform architecture between Sierra and Silverado on the GMT1 generation means running board mounting provisions are consistent across both nameplates within the same cab configuration and trim level.

Denali and Trim Level Compatibility

Denali running boards use specific finish and design elements that reflect the premium positioning of that trim level. The step surface profile, end cap design, and mounting bracket finish on Denali-spec running boards differ subtly from base and mid-level trim configurations. Confirming the trim level of the donor running board against your truck prevents finish and design mismatches that become visible after installation.

VIN Verification

Share your VIN before ordering. We cross-reference the donor running board configuration against your specific truck across model year, cab configuration, and trim level before the order processes.

OEM Quality and Function

Every running board in this listing is factory original from a verified 2020 through 2025 GM HD donor truck. The step surface construction, end cap finish, and bracket integrity all reflect factory production specifications for the specific trim level of the donor vehicle.

Factory side steps on this generation of GM HD trucks use slip-resistant step surface textures engineered for daily use across varying weather and terrain conditions. Work trucks that operate on job sites, construction yards, and agricultural properties put running board step surfaces through more demanding conditions than a daily commuter truck. OEM step surfaces handle these conditions consistently in a way that thin aftermarket alternatives frequently do not over extended daily use.

The factory appearance benefit is particularly relevant on Denali-trimmed trucks where the overall exterior finish standard is high. OEM truck entry steps from the correct trim level maintain the visual coherence of the factory exterior package. Aftermarket alternatives at the same price point rarely replicate the Denali-specific finish quality at the end caps and step surface edges where the difference is most visible.

Shipping and Availability

OEM 2020 through 2025 GM HD Crew Cab running boards ship nationwide from our Cleveland, Ohio facility. Local pickup is available for buyers who want to inspect the boards in person before taking delivery. Local delivery is available in select areas around Cleveland.

Availability varies by trim level, model year, and current donor vehicle inventory. When you contact us, provide your year, model, cab configuration, trim level, and VIN. We confirm current availability and match the correct running board configuration to your truck before anything ships.

Before You Order

Confirm your model year, cab configuration as Crew Cab, trim level, and platform as Sierra or Silverado HD before reaching out. Request photos of the step surface condition, end caps, and bracket mounting points before committing to a purchase. Availability changes as donor vehicles come through our Cleveland facility.

Contact our team with your year, model, cab configuration, and VIN. We confirm fitment before anything ships.

McClain Auto Part. Cleveland, Ohio. OEM GM truck parts shipped nationwide. In business since 2009.