What is the paint code for GMC Thunderstorm Gray?

The official OEM paint code for GMC Thunderstorm Gray is GNO / WA633D. It is a Metallic finish. Always use this exact code when ordering replacement or touch-up paint to ensure a factory-accurate color match.

Where can I find paint code GNO / WA633D on my GMC?

On most GMC vehicles, the paint code sticker is located on the driver's door jamb or vehicle identification sticker. Look for the code GNO / WA633D on the label.

What type of paint is Thunderstorm Gray (GNO / WA633D)?

Thunderstorm Gray (GNO / WA633D) — Metallic. Metallic paints contain small metal flakes that create a shimmering effect.

Which years was paint code GNO / WA633D produced?

GMC Thunderstorm Gray (GNO / WA633D) was produced for model years 2023 – 2025.

Which GMC models used paint code GNO / WA633D?

Paint code GNO / WA633D (Thunderstorm Gray) was used on the following GMC models: SIERRA, HUMMER EV.

Which brand uses Thunderstorm Gray (GNO / WA633D)?

Thunderstorm Gray with paint code GNO / WA633D is an OEM factory color by GMC. It was available from 2023 – 2025.

GMC Thunderstorm Gray (GNO / WA633D)

Color Name

Thunderstorm Gray

Paint Code

GNO / WA633D

Also Known As

Slate Gray, Meteorite

Paint Type

Metallic

Base Color

Gray

Brand

GMC

Models

SIERRA, HUMMER EV

Years

2023, 2024, 2025

GMC Thunderstorm Gray (paint code GNO / WA633D) is an OEM factory metallic paint color used on the SIERRA, HUMMER EV. This color was available from the factory in: 2023, 2024, 2025. It is also known as Slate Gray, Meteorite. The base color family is Gray. Use this code when ordering touch-up paint, spray cans, or body shop refinishing products to ensure an exact OEM color match.

GMC Models

ACADIA ALLURE CANYON ENCLAVE ENVOY HUMMER EV JIMMY LACROSSE M/D TRUCK SAFARI SAVANA SIERRA SONOMA SYCLONE TERRAIN TOPKICK TYPHOON YUKON

GMC Thunderstorm Gray (GNO / WA633D)

FAQ (GNO / WA633D — Thunderstorm Gray)