In this video we take a walkaround tour of the 2023 GMC Sierra 2500HD AT4 4x4 in the Cayenne Red Tintcoat exterior with the Black/Kalahari interior. The GMC Sierra and Chevy Silverado heavy duty trucks are getting a refresh for the 2024MY so changes for 2023MY are very small. The AT4 trim sits below the Denali but with the AT4 Premium package, it offers most of the equipment that the Denali offers. Let me know what you think in the comments below!

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