Summary

• With 61 currently listed for sale and an average price of $56,767.00 CAD, 26.2% of 2021 GMC Sierra 2500HD models for sale on CarGurus are rated as good or great deals.

• Favourably reviewed: Owners rated the 2021 GMC Sierra 2500HD 5 / 5 stars.

• 100.0% of 2021 Sierra 2500HD models on CarGurus are accident free.

Why it stands out

The 2021 GMC Sierra 2500HD is a robust and upscale heavy-duty pickup truck, known for its versatility and advanced technology features. As a three-quarter-ton model, it stands apart from competitors like the Ford F-150 and Ram 1500 with its "Professional Grade" design and finish. The Sierra 2500HD offers a higher level of comfort and convenience amenities, often similar to those found in the lighter Sierra 1500 model, catering to both personal and fleet buyers looking for a reliable vehicle.

It has been especially praised for its reliability and high owner satisfaction scores, exemplified by its perfect user rating of 5 stars. The 2021 model carries over strong attributes from its predecessors, including generous storage options and a range of engine configurations, promising great towing capacities and performance. Despite some competitors offering slightly more powerful options, the Sierra’s comprehensive suite of tech features, such as connectivity and safety systems, makes it a compelling choice for many buyers.

Other model years to consider

• 2025 GMC Sierra 2500HD

  • Average price: $93,493.00 CAD
  • Good/great deal percentage: 25.5%
  • User rating: 5 / 5
  • Total listings: 137

• 2024 GMC Sierra 2500HD

  • Average price: $79,757.00 CAD
  • Good/great deal percentage: 27.5%
  • User rating: 4 / 5
  • Total listings: 153

• 2023 GMC Sierra 2500HD

  • Average price: $72,355.00 CAD
  • Good/great deal percentage: 25.0%
  • User rating: 4 / 5
  • Total listings: 144

This analysis is based on CarGurus' proprietary market data from June 1, 2026, CarGurus experts' opinions, and generative AI.