2025 GMC Sierra 2500HD Paint Color Codes & Touch-Up Guide

Whether you need to fix a minor scratch from the job site or are planning a larger body repair, knowing the exact paint code for your 2025 GMC Sierra 2500HD is essential for a seamless color match. GMC offers a rugged yet premium palette for the heavy-duty Sierra lineup, ranging from standard work-truck solids to complex tri-coats.

Below is your complete guide to the 2025 GMC Sierra 2500HD paint colors, where to find your truck's specific code, and how to apply touch-up paint for a flawless finish.

Quick reference

Here are the factory colors offered for the 2025 GMC Sierra 2500HD. Please note that availability may vary based on the specific trim level (e.g., PRO, SLE, SLT, AT4, Denali, or Denali Ultimate).

Color Name	Paint Code	Type
Summit White	GAZ	Solid
Onyx Black	GBA	Solid
Cardinal Red	G7C	Solid
Sterling Metallic	GXD	Metallic
Titanium Rush Metallic	G6M	Metallic
Volcanic Red Tintcoat	GNT	Metallic / Tintcoat
Downpour Metallic	GXP	Metallic
Thunderstorm Gray	GNO	Solid
Redwood Metallic	G88	Metallic
White Frost Tricoat	G1W	Pearl / Tri-coat

Note: If you are uncertain about a specific color, always confirm via your Vehicle Identification Number (VIN) at a local GM dealer or trusted paint supplier.

Where to find your paint code

General Motors has updated where they place their paint codes in recent years. While older trucks featured a Service Parts Identification (SPID) sticker in the glove box, your 2025 GMC Sierra 2500HD will have this information on the driver’s side door jamb.

Open the driver’s door and look at the B-pillar (the frame pillar behind the door). You will find a silver or black certification label that includes a QR code.

1. The paint code is typically located at the bottom of this sticker, often prefixed by "U" (for Upper body) or "WA" (e.g., WA8624 for Summit White). General Motors uses both a standard RPO code (like GAZ) and a WA-code.
2. If the printed text is worn or hard to read, you can scan the QR code with your smartphone to pull up your truck's exact build data, which includes the factory paint code.

Best touch-up paint sources

Once you have your paint code, you have several reliable options for purchasing touch-up paint:

• Your Local GMC Dealer: For the most accurate standard match, ACDelco touch-up paint pens are available directly from the parts counter.
• AutomotiveTouchup: Highly recommended for larger aerosol cans and custom-mixed batches, especially if you are painting an entire bumper or fender flare.
• Dupli-Color: A readily available choice at most auto parts stores. They offer Exact-Match pens and aerosols for common GM colors like Onyx Black and Summit White.
• Tcoat Custom-Mix: Great for getting a precise color formulation, including the necessary base and mid-coats for complex factory colors.

How to use touch-up paint

Achieving a professional-looking repair at home requires patience and the right process. Follow these steps for rock chips and deep scratches:

1. Clean the area: Wash the panel thoroughly. Use wax and grease remover or rubbing alcohol on a microfiber towel to clean the scratch. Make sure there is no rust; if there is, gently sand it away or apply a rust converter.
2. Apply Primer (if needed): If the scratch goes down to the bare metal or plastic, apply a light coat of automotive primer. Let it dry completely.
3. Apply Base Coat: Shake your touch-up pen or bottle vigorously. Apply the paint in thin, light layers. Do not try to fill the scratch in one go. Wait 15-20 minutes between coats until the color covers the primer.
4. Apply Clear Coat: Once the base coat is dry (usually after 30-60 minutes), apply a protective clear coat. The clear coat provides the UV protection and the glossy finish that matches the rest of your truck.

Color matching tips for pearls and tri-coats

Colors like White Frost Tricoat (G1W) and Volcanic Red Tintcoat (GNT) require extra attention. Tri-coat paints consist of three layers: a solid base coat, a translucent pearl mid-coat, and a clear coat.

When touching up a tri-coat:

• Buy a Tri-Coat Kit: Ensure your touch-up paint provider includes both the base and mid-coat bottles.
• Test First: Always practice on a piece of cardboard or scrap metal. The final color changes depending on how many layers of the pearl mid-coat you apply.
• Blend Carefully: Apply the base coat to cover the scratch, then lightly feather the mid-coat over the area until the shimmer matches the surrounding factory paint.

If your 2025 Sierra requires extensive paintwork or a difficult blend on a pearl finish, it is usually best left to professionals. Find a trusted body shop on Repairius to ensure your heavy-duty truck looks exactly as it did the day it rolled off the assembly line.