Install Instructions for 81-2007

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Before You Start

Kit may not fit with the following Aftermarket Parts installed:

Body Lift or Lowering Kit

Custom Hood

Aftermarket Turbocharger and/or Throttle Body Spacer

  • Please read the entire product guide before proceeding.
  • Ensure all parts are present.
  • If you are missing any of the components, call our customer support at (909) 947-0015.
  • Do not work on your vehicle while the engine is hot.
  • Make sure the engine is turned off and the vehicle is in Park or the Parking Brake is set.

Required Tools

  • Eye Protection
  • Phillips Screwdriver
  • 7mm Socket
  • 15mm Deep Socket
  • 18mm Deep Socket
  • Breaker Bar
  • Torque Wrench (ft. lbs.)
  • 1/2" Ratchet
  • Impact Wrench


Step 1

Remove the (4) 7mm bolts holding the front grille on.

*These are located on the top to the grille assembly.

Step 2

Remove the hidden 7mm bolt located above and behind the GMC grille badge.

Step 3

Unbolt and remove both of the lower headlight assemblies and remove the bulbs from the housing.


Step 4

Disconnect the marker light bulbs.

Step 5

Remove the two 7mm bolts holding the grille assembly onto the vehicle. Then remove the entire grille assembly from the vehicle.

Step 6

Passenger Side

Now it's time to remove the (2) Front Core Support mounts. Go ahead and start on the Passenger side lower core support mount. You'll need a 15mm socket and Breaker Bar on top, as well as an 18mm socket for the nut under the mount.

*For this step, we recommend having someone help you hold the Breaker Bar for the upper core support mount bolt.

Go ahead and do the same thing for the Driver Side Front Core Support lower mount.

Step 7 *Optional Step

It may not be fully necessary, but we recommend loosening the 18mm bolt located between the corner of the Front Bumper and the Marker lights.

*2 bolts in total.

Step 8

Drivers Side

Now that you've removed the lower section of the Driver Side Core Support mount, go ahead and work your way down the driver side line of body mounts and just remove the lower section for right now. You'll need a 15mm socket for this step.


Step 9

Driver Side

Next, jack up the cab of the vehicle and remove the upper section of the Body Mounts.

*use a pinch-weld or secure lift point when jacking up your vehicles cab in order to prevent damage from occurring.

Once that's done, install the top section of the Front Driver Side Core Support first, then install the (3) remaining upper sections of the S&B body mounts onto the frame.


Step 10

Driver Side

Lower the cab down onto the S&B Upper Body Mounts.

Next, take the (4) lower sections of the S&B Body Mounts and using the provided 18mm bolts, go ahead and bolt up each Body Mount assembly, starting with the Front Core Support.

*For the Front core support, you'll need a 15mm socket for the top end and an 18mm socket for the bottom end of the core support mount bolt.

**Make sure to not fully tighten/torque down the (4) bolts down in order to make the next set of steps easier.

Step 11

Passenger Side

Now go ahead and move to the Passenger side and work your way down the line removing the lower section of Body Mounts. You'll need a 15mm socket for this step as well.

Step 12

Passenger Side

Now, using a floor jack with an extension, jack up the passenger side truck body enough to remove the old Upper Body Mounts (4 in total).

*use a pinch-weld or secure lift point when jacking up your vehicles cab in order to prevent damage from occurring.

Install the (4) S&B Upper Body Mounts.

Step 13

Passenger Side

Lower the cab down onto the upper S&B Body Mounts.

Next, take the (4) lower sections of the S&B Body Mounts and using the provided 18mm bolts, go ahead and bolt up the (4) S&B Body Mounts. 

Once done, go ahead and fully tighten the passenger side body mount bolts down (4).

*For the Front core support, you'll need a 15mm socket for the top end and an 18mm socket for the bottom end.

Step 14

Driver Side

Fully tighten down the (4) Body Mount Bolts on the driver side.

Step 15: Torque Specs

Once every bolt is tightened, go ahead and Torque down each body mount bolt to 63 ft.lbs..

Step 16

Tighten the two 18mm bolts, one on each corner of the bumper. Please refer to Step 7 earlier in this install.

Step 15

Mount the grille back into position.

Tighten down the (4) bolts on the top of the grille.

Tighten down the (2) bolts just behind the headlights.

Lastly, tighten down the screw behind the GMC grille text.


Step 16

Install the headlights, marker lights, and turn signal bulbs into their respective locations.

Tip: When installing the headlight assembly/housing, ensure that the housing has text visible on the top and the bulbs are facing straight out.

Once done, go ahead and tighten down each of the headlight housings (4) bolts/screws per headlight assembly.

Step 17

Once done, verify all bolts are tightened and torqued down to the proper Torque Spec.

Your installation is now complete.