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2025 Gmc Sierra 3500hd Oil Capacity. Research 2025 gmc sierra 3500hd specs for the trims available. As we can see from these tables, the 2025 gmc sierra hd model with the highest towing capacity rating is the 3500 hd regular cab / long bed drw (dual rear.

Comprehensive 2025 gmc sierra 3500hd denali guide. Everything you need to know about each trim in the 2025 gmc sierra 3500 hd crew cab lineup, all in one place.