How to Install N-Fab Cab Length Nerf Side Steps - Gloss Black on your Sierra

Bolt Kit:
4) 8mm x 1” bolts (crew cab only)
6) 5/16 fender washers (large washers)
6) 5/16 tinnerman clips (2 needed for crew cab, 6 needed for quad/extended cab)
6) 3/8” hex nuts
6) 3/8”x 1.5” carriage bolts
6) 3/8” flat washers
6) 5/16” x 1” hex head bolts (2 for crew cab, 6 for quad/extended cab)

Step 1. Start by locating the driver side nerf-step. To do so, locate the shorter tail bend. The short end will go towards the front of the vehicle. NOTE: Some models have a straight cut end with a cap, straight cut end goes towards the rear tire.

Step 2. Locate the factory threaded mounting holes located under the door on the vertical part of the floor pan. Next, locate the last mounting position on the pinch weld near the back of the cab. Install a 8mm metal clip in the upper hole right above the pinch weld mount. NOTE: Quad/Extended Cab models will use three clips in the upper mounts on both sides. NOTE: Some models may have existing 8mm nuts welded in the pinch weld on each side. Four additional 8mm x 1” hex bolts may be required.

Step 3. Align the nerf-step brackets with the factory bolt hole locations. NOTE: Be sure the shorter tail bend is towards the front of the vehicle. Start all three upper 8mm x 1” hex bolts, 3/8 fender washers, and hand tighten. Next, start the 3/8” carriage bolts, 3/8 nuts and 3/8 flat washers on the bottom part of the bracket and hand tighten. NOTE: The carriage bolts will start at the bottom of the bracket and then go through the pinch weld with the nut and washer on top.

Step 4. After final positioning, there will be a small gap in between the lower part of the bracket and the pinch weld. Starting with the lower bolt hole locations, torque each bolt to 15-20 ft/lbs. This will load the brackets to the body. Next, torque the upper bolt locations to 15-20 ft/lbs.

Step 5. Repeat steps 2-4 for the passenger side.
This concludes the installation.