Shop 1999-2006 GMC Sierra 1500 running boards and step boards by matching the exact model year, cab configuration, and product application shown on the individual product page. The live assortment on this parent page is concentrated on Extended Cab and Regular Cab applications; Crew Cab products are handled separately.
Choose the Right Sierra 1500 Step
The live assortment includes 5-inch and 6-inch running boards plus 6-inch step-board designs in black and stainless finishes where listed. Confirm exact year and cab first, then compare stepping surface, profile, dimensions, materials, brackets, package contents, and installation notes.
Shop by Cab
1999-2006 GMC Sierra 1500 Running Boards FAQ
Will every product on this page fit every 1999-2006 Sierra 1500?
No. Exact cab configuration, mounting application, and product design vary by listing. Use the individual product page as the controlling fitment source.
Are Crew Cab, Extended Cab, and Regular Cab boards interchangeable?
Do not assume so. Cab dimensions can change board length, brackets, mounting points, and step position. Choose a product that specifically names the truck’s cab configuration.
How should I compare 5-inch, 6-inch, and step-board designs?
Match fitment first, then compare stepping surface, profile, width, dimensions, material and finish details, and package contents. Width or appearance alone does not determine compatibility.
What should I verify before installation?
Check the exact model year and cab, mounting application, included brackets or hardware, package contents, and installation notes. Do not assume drilling requirements or factory mounting-point use unless the product page states it.
Aftermarket trademark disclaimer: People Auto Parts is not affiliated with, sponsored by, or endorsed by General Motors LLC. GMC, Sierra, Sierra 1500, GM, and related trademarks belong to their respective owners and are used only to identify compatible applications. Products are aftermarket parts unless an individual listing expressly states otherwise.
