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2022-2026
GMC Sierra
Hood Bulge/Upper Grille Installation Guide

​Predicted Installation Time: 20-25 Minutes

Items Included

• 1 Hood Bulge Overlay 
• Preinstalled 3m Tape
• 1 Adhesion Promoter Packet

Tools Required

• Isopropyl Alcohol
• Clean Cloth
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Before You Get Started...

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Warm surfaces and 3M tape with heat gun if ambient temperature is below 68 degrees F
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Any Modification or unintended use will void the manufacturers warranty
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A dry fit of all pieces must be performed before the final installation of the product to ensure fit
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Products cannot be returned for a full refund after the red backing to the 3M tape is removed

Preparation

The degree to which you follow these preparation instructions will determine the quality of the installed product.  Please follow all instructions and be patient.  If you are unsure of any area of the installation after reading these instructions, please call us at 844-918-3688 (EXT 3) and we will answer any questions that you have.

Installation

1.  Dry-fit your Hood Bulge/Upper Grille Molding overlay by following the instructions below without removing the backing to the 3M double-sided tape. Ensure the part is centered, and make note of its positioning for reference later.
​

2. Ensure the upper hood area is clean and free of debris. Use Isopropyl rubbing alcohol to free the bumper surface of any chemicals or soap residue that may limit the effectiveness of the 3M tape.  Apply the adhesion promoter stick along all areas of the bumper where the 3M tape will be touching down.
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Clean upper grille thoroughly with Isopropyl alcohol and a clean cloth
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Apply your adhesion promoter where the 3m tape will be touching down. 
3a. Peel all the backing completely to all of the 3m pieces of tape indicated in the picture below (don't touch the remaining red strips until the next step).
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Your part should look something like this after you've completely removed the appr
3b. For the remaining pieces of tape, peel back the edges 1" and tape the exposed tape around to the front of the overlay for easy access later. Secure them in place with masking tape.
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On the remaining pieces of red tape, peel back the red 3m 1" and wrap it around to the front.
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Your overlay should look close to this once you've completed these steps. 
4. Now it is time to install the overlay on the OEM part. Carefully place the overlay over the upper hood/grille bulge. Be careful not to let the tape touch down until the applique is centered, and you are happy with its position. Ensure the left and right corners completely overlay over the chrome. (If your model has a protective film on the surface, peel back the area that will be tucked under the tailgate cap.) Continue down the part, applying pressure as you go. 
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5. Once the overlay is securely in place, take off the masking tabs holding the exposed 3m strips in place. Remove the remaining pieces of 3m tape from the Shellz, applying firm pressure as you go. 
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**ONLY IF YOU HAVE PROTECTIVE FILM** Remove the protective film from the overlay.
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Care for your BumperShellz™

Care for your BumperShellz™ like you would any fine paint finish.   Use high quality cleaning products designed specifically for car care.

Gloss finishes: Oftentimes, minor scratches can be buffed out on the gloss finishes.  Rubbing compounds can be used with a mechanical buffer, for deeper scratches.
​
Matte finishes are much more susceptible to abrasions, leaving a "glossy sheen" on the finish, which are generally permanent.  Do not attempt to buff out scratches/abrasions on your matte finish, as this will generally make the damage worse.  Avoid excessive friction when trying to remove anything stuck to the matte finish surface and keep cleaning rags/water clean and abrasive free.  Abrasive brush-type car washes are not recommended, as they can abrade the Matte finish.  Brushless car washes are acceptable.

​NOTE for Maximum Adhesion: The acrylic foam tape used to adhere your BumperShellz is “pressure sensitive”, so making sure there is sufficient pressure applied to each of the taped areas is vital to achieve optimum adhesion of your BumperShellz™ to your bumper.  It is also recommended that you come back a few hours later, or the next day, to give each BumperShellz piece another pressure rub to ensure the best adhesion. Allow the tape adhesive to set up for at least 24 hours before washing your truck. Maximum adhesion is reached after 3-5 days in temperatures above 70 degrees, longer if it is cooler. Once the adhesive has fully bonded to a properly prepared bumper surface, it is nearly impossible to remove the BumperShellz without damaging them. Please refer to “removal instructions” in the BumperShellz FAQ section on the website, should removal be necessary.

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3860 Cincinnati Ave 
Rocklin , CA 95765
  • Home
  • Products
    • GapShield
    • AeroBox
    • BumperShellz
  • SALE ITEMS
  • New Model Request
    • 2024+ F150 Early Interest Form
    • 2022-2026 Toyota Tundra Door Guard Chrome Delete
    • 2022-2026 Toyota Tundra Fender Overlays Early Interest
  • Become A Dealer
  • Contact Us
  • Installation Instructions Home
    • CHEVROLET MODEL YEAR SELECT >
      • 2007-2013 Silverado Installation Home
      • 2014-2015 Silverado Installation Home
      • 2016-2018 Silverado Installation Instructions Home
      • 2019-2021 Installation Home >
        • 2019-2021 Front Bumper Installation Home
      • 2022-2026 Installation Home >
        • 2022-2026 Front Bumper Installation Home
        • 2022-2026 Silverado Grille Installation Home
    • GMC MODEL YEAR SELECT >
      • 2007-2013 GMC Sierra Installations Home
      • 2014-2015 Sierra Installation Home
      • 2016-2018 Sierra Installation Home
      • 2019-2024 Sierra 1500 Installation Home
    • RAM MODEL YEAR SELECT >
      • 2009-2012 RAM Installation Configuration
      • 2013-2018 RAM Installation Configuration
    • TOYOTA MODEL YEAR SELECT >
      • 4th Gen Tacoma Rear Bumper Instructions Home
      • Tundra Installation Configuration >
        • Tundra Installation Version Selector Page
  • Acrylic vs. Painted-to-Order
  • Painted Parts Policy
  • Paintable ABS Disclaimer
  • Product Overview
  • Toyota Tacoma New Product
  • News
  • FAQ's
  • About Us