GMC Sierra 2500HD for sale

GMC Sierra 2500HD 2025

The 2025 GMC Sierra 2500HD remains one of the most capable work tools available in Canada, with a maximum payload of 1,097 kg and a fifth-wheel towing capacity reaching 14,969 kg with the available package. Engine choices include the 6.6L V8 gasoline unit (401 hp) and the Duramax 6.6L turbo-diesel L5P (470 hp, 975 lb-ft of torque). For 2025, GMC adds the high-definition Birdseye 360° camera as standard on AT4X and extends the MultiPro Tailgate to crew-cab configurations. The Denali Ultimate trim gains MagneRide semi-active suspension damping. The Allison 10-speed automatic paired to the diesel remains among the most robust transmissions in the segment. On used diesel examples, inspect the DEF injection system and high-pressure injector condition — critical service points beyond 150,000 km. Review the diesel particulate filter maintenance history on any truck with documented commercial or fleet use.