GMC Imperial Blue Effect (WA403P) Touch Up Paint

The Look

This color captures a specific moment in the mid-2000s when GMC began pushing their SUVs toward a more premium aesthetic. Whether you are fixing a chip on your Canyon or refreshing a door edge on your Denali, this shade carries a serious, professional weight. In the shade, your Envoy or Acadia might look almost black, but direct sunlight pulls out a deep, regal blue that sets it apart from more common navy tones. Since your vehicle has been on the road since 2007, the original finish has likely developed a unique character, making a precise touch-up vital to maintaining that cohesive, factory-fresh appearance.

Technical Details

This is a metallic finish, which means it relies on tiny flakes to create that signature depth. These flakes are heavier than the blue pigment and love to settle at the bottom of the container. If you do not keep the container moving while you work, you risk creating dark blotches or uneven lines where the metal particles have clumped together. Metallic paints are notoriously sensitive to how they are applied; if the layers are too heavy, the flakes will sink and lose their sparkle, leaving you with a dull, mismatched patch instead of a crisp repair.

Best Practices

Before you spray or dab GMC Imperial Blue Effect (check for code WA403P), you need to shake it for 60 seconds. You can find your official paint code on the silver or white Service Parts sticker located inside your glove box-look for the "BC/CC" line at the bottom. To get the best results, work in your garage or a patch of shade to keep the surface cool. Always test the color on the included card to see how the metallic flake settles before touching the actual vehicle. Apply the paint in very thin, light layers and give each one plenty of drying time. Rushing the process will trap the flakes and prevent the color from truly popping once you apply your clearcoat.