LUND SR2 Instrucciones De Instalación página 3

3. Select (1) Mounting Bracket. NOTE: (7) Brackets are universal and will fit all left or center and rear right
side. Bolt the Mounting Bracket to the Clip Nuts and/or the factory threaded holes with (2) 8mm Hex
Bolts, (2) 8mm Lock Washers and (2) 8mm Flat Washers, (Figures 7 & 8). Do not tighten hardware.
4. Repeat Steps 1—3 to install the (3) remaining driver side Brackets.
5. Select (1) Running Board. Place the Running Board on top of the Brackets. Locate the channels in the
bottom of the Running Board. Select (4) 8mm Double Bolt Plates, (Figure 9). Insert the Bolt Plates into
the channels in the bottom of the Running Board closest to the Brackets, (Figure 10). Lift the Running
Board up and guide the studs through the Brackets.
6. Attach the Running Board to the Brackets with (8) 8mm Flat Washers and (8) 8mm Nylon Lock Nuts,
(Figures 11 & 24). NOTE: The Running Board is designed to fit close to the vehicle. It may be
necessary to loosen the Bracket hardware and tilt the Brackets downward to insert the Running Board
between the Brackets and the body. Do not tighten hardware at this time.
7. Level and adjust the Running Board and fully tighten all hardware.
8. Move to the passenger side of the vehicle. On the passenger side, determine if the vehicle is equipped
with a plastic diesel exhaust fluid (DEF) tank, (Figures 12 & 13).
Models without DEF tank, skip to Step 9.
Models with DEF tank: The tank sits close to the side of the body. With specialized tools, the
passenger front upper and lower Bracket can be installed but room is very limited. Determine model
year of vehicle before proceeding.
Up to 2016 models:
It may be easier to drop the tank down to access the inner side of the body panel for upper bracket
installation. Tank will not need to be removed, only dropped down for access to mounting location.
IMPORTANT: If tank is full, it will be very heavy and assistance is highly recommended to avoid injury
or damage to the vehicle or the tank. It is recommended that installation is performed when the DEF
tank is low on fluid before dropping the tank.
a. On models with plastic lower tray under the tank, remove the (3) hex bolts attaching the tray to
the frame, (Figure 12), and remove the tray.
b. Release the tank filler hose. Release the plug for the sending unit on the top of the tank.
c. Support the tank with a floor jack. Place a smooth flat surface, (wooden block for example),
between the floor jack and the tank to avoid damaging the plastic tank. DO NOT PUSH UP ON
THE TANK; only support the weight of the tank with the jack.
d. Remove the (2) bolts securing the tank straps to the vehicle, (Figure 13). Tilt the straps to
release from the brackets. Slowly lower the tank until the top of the tank is almost visible. Use
blocks or stands to support the tank while installing the front Upper and Lower Brackets.
e. Proceed to Step 9.
On 2017 models:
a. Remove the (4) hex bolts attaching plastic cover to DEF tank, (Figure 14A) and remove plastic
cover, (Figure 14B). NOTE: On 2017 2500/3500 models, only remove plastic cover from DEF
tank. DO NOT LOWER DEF TANK and proceed to Step 9.
9. Locate the first tab on the edge of the pinch weld, (Figures 2—5, 16 & 18). Select the Upper Bracket,
(Figure 15). Repeat Steps 2 & 3 to attach the passenger front Upper Bracket to the side of the body
panel, (Figure 16). Do not tighten hardware at this time.
10. Line up the hole in the bottom of the Upper Bracket with the hole in the tab on the pinch weld.
a. Models with a weld-nut: Slide the Bracket over the weld-nut, (Figure 16). Attach the Lower
Bracket to the bottom of the body and weld-nut with (1) 8mm x 25mm Hex Bolt, (1) 8mm Lock
Washer and (1) 8mm Flat Washer, (Figures 19 & 24). Leave loose at this time.
b. Models with flat tab and hole: Insert the 8mm Bolt Plate down through the hole in the Upper
Bracket and mounting tab, (Figures 17 & 18). Attach the Lower Bracket to the bottom of the
body and Bolt Plate with (1) 8mm Flat Washer and (1) 8mm Nylon Lock Nut, (Figures 19 & 23).
Leave loose at this time.
07-17 1500-2500-3500 SILVERADO/SIERRA CREW CAB
Page 2 of 7
SR2 RUNNING BOARDS
INCLUDES DIESEL W/DEF
11/13/17 (RA)