Uploaded June 2023 | Updated September 2026, 5 days ago

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The New 2024 GMC Sierra Heavy Duty AT4 dominates the off-road like it means business. Off-road ambassador David Ostapiw, @ostacruiser, highlights and demonstrates his favorite features in the New GMC Sierra HD AT4.

0:00 - Sierra HD AT4 Overview
0:26 - Pulling Power
0:38 - Exterior Features
0:55 - Trailering Tech

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