COLOR CODE21/WA218M - Laser Blue MetallicGMC Touch-Up Paint

The Look

Your Sierra or Yukon comes from an era where GMC wasn't afraid to let their trucks wear a bit of personality. This isn't a fleet-vehicle navy or a standard dark blue; it has a punchy, electric quality that catches the light and gives these heavy-duty bodies a much sharper edge. Because your truck has been on the road since the late 2000s, you might notice the original finish has shifted slightly due to sun exposure. This blue is famous for its depth, but it only works if you respect the way it reflects light across those broad GMC panels.

Technical Details

This is a metallic finish, which means the paint is packed with tiny flakes that provide that signature glow. The risk here is mottling-which looks like dark spots or "bruises" in the paint-caused by the flakes clumping together. If you apply the paint too heavy in one go, the metallic particles sink and create a finish that looks uneven or dirty. The secret to a professional result is building the color in light, thin layers. This allows the flakes to lay flat and uniform, ensuring the repair area reflects light at the same angle as the rest of your door or fender.

Best Practices

Before you spray or dab GMC Laser Blue Metallic (check for code 21/WA218M), you need to shake it for 60 seconds. You can verify your code on the silver Service Parts Identification sticker located inside your glove box. Always test the color on the included card first to get a feel for the flake density. Work in a cool garage or the shade to prevent the paint from setting too fast. When applying, keep the container moving and focus on light coats. Give the paint plenty of drying time between layers to let the metallic particles settle. Once the color is level and dry, a clear coat is essential to lock in that metallic shimmer and protect the repair from the elements.