Continued on page 4
page 3
Z312111
2015 GMC Sierra
2500/3500 HD
Z312111
2015 GMC Sierra
2500/3500 HD
Step 7
Your installation is now complete. Reattach the grille/
bumper assembly back to the vehicle in reverse order
of removal. Make sure you reconnect all disconnected
wiring harness and reattach all clips and screws. Wire
the LED Light Bar via our optional wiring harness kit
(part# 639HAR1) or custom wiring harness. Light bars
are installed flush with the grille from the factory. This
may or may not be ideal for each light depending on
the configuration of your vehicle and its options and
or modifications. To adjust the angle of your Light Bar,
rotate the Light Bar to adjust the angle, then tighten
the hardware once the desired angle is achieved
(please be careful not to over tighten the mounting
hardware or scratch the finish of the grille). It is best to
adjust the angle with the vehicle on level ground with
lights facing a wall, garage door or other solid barrier.
We recommend checking from a distance of 25’. (Fig 7)
Fig 7
Step 6 “DENALI HD ONLY”
Secure the grille assembly with the screws and U nuts.
(Fig 6)
Fig 6
Step 6 “STANDARD HD”
Secure the grille assembly with the screws and U nuts.
The outer tabs use the grille brackets and additional
screws secure to the inner grille shell as shown. (Fig 6)
Fig 6
