Side Step Mounting Kit 101: What’s Included And What You Still Need

This article is part of our Side Steps Guide.

Buying a new Side step is only half the job. The other half is making sure the mounting kit actually matches your truck or SUV, includes the right brackets and hardware, and does not leave you halfway through the install with missing pieces.

For DIY owners, fitment problems usually come down to a few common issues: cab style differences, model-year changes, factory holes that do or do not line up, and confusion about whether the kit includes every bolt, bracket, and support plate needed. A quick check before installation can save a lot of time, frustration, and return shipping.

This guide breaks down what a side step mounting kit commonly includes, what you may still need to source separately, and how to tell whether the kit is compatible with your specific vehicle.

What a Side Step Mounting Kit Usually Includes

Most side step kits are designed to include the core hardware needed to attach the steps to factory mounting points on compatible vehicles. Exact contents vary by brand and application, but most kits follow a similar pattern.

• Mounting brackets matched to the driver and passenger sides
• Bolts, nuts, flat washers, and lock washers for attaching brackets and steps
• Support brackets or center brackets for longer wheelbase vehicles
• Backing plates, nut plates, or clip nuts when required by the vehicle design
• Step-to-bracket hardware separate from frame-mount hardware
• Basic installation instructions with torque guidance or bracket location diagrams

If your kit is vehicle-specific, the bracket geometry is usually the most important part. Side steps themselves may look universal, but the brackets are what determine whether the assembly sits level, clears the rocker panel, and supports weight correctly.

What May Not Be Included in the Box

A common mistake is assuming every side step package includes literally everything needed for a complete install. In reality, some kits require a few extra parts, especially if the vehicle has been modified or if factory hardware is missing.

• Replacement factory bolts if previous hardware is rusted, stripped, or missing
• Thread locker for vibration resistance where recommended by the manufacturer
• Rust penetrant to free up corroded mounting points
• Touch-up paint or rust inhibitor if exposed metal is created during installation
• Drill bits or specialty fasteners for applications that require minor drilling
• Torque wrench and common hand tools, which are usually not included
• Plastic trim fastener tools if underbody shields or splash guards must be removed

Some side steps also ship separately from the bracket kit. In those cases, the listing may mention that the bars and mounting hardware are sold together or sold separately, so it is worth verifying exactly what the product page includes before ordering.

How to Confirm Fitment Before You Buy

Match the Exact Vehicle Details

Start with the basics: year, make, model, trim, cab configuration, and bed length if applicable. A side step kit that fits a crew cab may not fit an extended cab, even within the same model year.

Check Rocker Panel and Frame Mounting Style

Some kits mount to factory threaded holes in the rocker area, while others attach to the pinch weld or frame. Confirm the mounting method used by your vehicle and compare it to the kit design.

Look for Notes About Diesel, Hybrid, or Off-road Packages

Special trims can change clearance around the frame, DEF tank, splash shields, or body cladding. These details can affect bracket shape and mounting position.

Review Installation Instructions First

If instructions are available online, read them before ordering. You will quickly see whether the install uses existing holes, requires trimming, or needs additional hardware not included in the standard package.

Common Fitment Issues DIY Owners Run Into

Most installation headaches happen because the kit is close to correct, but not correct enough. Here are the issues that come up most often.

• Ordering for the wrong cab size or door count
• Confusing running boards, nerf bars, and side steps that use different bracket systems
• Assuming the same kit fits all trims within a generation
• Discovering the vehicle has aftermarket flares, lift parts, or rock sliders that interfere with normal placement
• Finding rust, undercoating, or damaged threads in factory mounting holes
• Missing left- and right-side bracket identification during installation
• Trying to reuse old hardware that no longer clamps safely

When a kit seems misaligned, stop before forcing bolts into place. Cross-threading factory mounting points or pulling brackets into position with impact tools can damage the vehicle and weaken the final install.

Tools and Supplies You Should Have Ready

Even when the hardware is complete, a smooth side step installation depends on having the right tools on hand. Most DIY installs are straightforward if the mounting points are accessible and clean.

• Socket set with common metric and SAE sizes
• Ratchet and extension bars
• Torque wrench
• Open-end or box wrenches
• Trim removal tool or flat plastic pry tool
• Penetrating oil
• Shop light
• Safety glasses and gloves
• Wire brush or thread chaser for dirty mounting points

If the instructions mention drilling, add a drill, the correct bit sizes, and rust-prevention supplies to your prep list. It is also smart to do a hardware inventory before lifting the steps into place.

How to Tell Whether Your Mounting Kit Is Complete

Before starting installation, lay everything out on the floor and compare it to the parts list. This simple step can prevent a mid-project delay.

1. Separate driver-side and passenger-side brackets.
2. Count all bolts, washers, lock washers, and nuts against the instruction sheet.
3. Identify any specialty hardware such as fish wires, nut plates, or spacer blocks.
4. Check the side steps for pre-installed inserts or threaded locations.
5. Confirm that each bracket location shown in the instructions has a matching part in the box.
6. Inspect all welds, threads, and coatings before installation.

If anything is missing, do not substitute random hardware from the garage unless the size, grade, and washer stack are confirmed. Side steps support repeated weight loads, so proper hardware matters.

Installation Tips for Better Alignment and Long-term Durability

A side step can technically bolt on and still sit crooked, vibrate, or loosen over time. Good installation habits make a big difference in appearance and durability.

• Start all hardware loosely before fully tightening any bracket.
• Install brackets first, then position the step bar and center it visually.
• Check door clearance and rocker-panel spacing before final torque.
• Torque hardware evenly from front to rear based on the instruction sequence.
• Recheck all fasteners after a short break-in period, especially after the first few drives.
• Wash road salt and mud from the brackets to slow corrosion.

If your vehicle sees winter roads or trail use, periodic bracket inspection is worth the effort. Hardware can loosen slightly as coatings compress and brackets settle into place.

When You May Need a Different Kit Instead of Extra Hardware

Sometimes the problem is not missing hardware at all. It is simply the wrong kit for the vehicle. Adding washers, spacers, or homemade brackets rarely solves a true fitment mismatch safely.

If the bracket holes do not line up with factory mounting points, the step length is clearly wrong for the cab, or the bar interferes with body cladding even when loosely installed, step back and verify the application. Vehicle-specific side step kits are engineered around body length, mounting geometry, and support load paths. Using the correct bracket set is the right fix.

Related Buying Guides

Check out the Side Steps Buying Guides

FAQ

Do Side Steps Come with Mounting Brackets?

Many do, but not all listings include brackets and bars together. Always check whether the product package includes both the side steps and the vehicle-specific mounting kit.

Are Side Step Mounting Kits Universal?

Most are not truly universal. Even if the step bars look similar, the brackets are usually designed around specific model years, cab styles, and mounting locations.

Can I Reuse My Old Side Step Hardware?

You can only reuse old hardware if it matches the new kit specifications and is in excellent condition. Rusted, stretched, or mismatched bolts should be replaced.

What if the Bracket Holes Do Not Line Up with My Truck?

First confirm left and right bracket placement and cab configuration. If alignment is still off, the kit may not match your exact vehicle application, and forcing the bolts is not recommended.

Do I Need to Drill to Install Side Steps?

Many modern vehicle-specific kits use factory mounting points and require no drilling. Some applications do require minor drilling or trimming, so check the installation instructions before starting.

How Long Does Side Step Installation Usually Take?

For a DIY owner with basic tools, most installs take about one to three hours depending on vehicle condition, rust, and whether splash shields or trim pieces need to be removed.

Why Is Fitment Different Between Crew Cab and Extended Cab Models?

Cab length and mounting point spacing change between configurations. That affects both the length of the side step and the position of the support brackets.