Used 2021 GMC Terrain for Sale near Thornhill, ON

Summary

• With 97 currently listed for sale near Thornhill, ON and an average price of $18,545.00 CAD, 23.7% of 2021 GMC Terrains for sale on CarGurus are rated as good or great deals.

• Favourably reviewed: Owners rated the 2021 GMC Terrain 5 / 5 stars.

• 100.0% of 2021 Terrain models on CarGurus are accident free.

Why it stands out

The 2021 GMC Terrain stands out as a compact SUV that leans into comfort, value, and a more premium feel than many rivals. GMC’s second-generation Terrain was differentiated with distinct styling inside and out, and the brand positioned it as the more premium offering with a slightly higher price. It also brought features such as a push-button gear selector, better sound insulation, and a slightly smarter interior. For shoppers who want a small SUV that feels a bit more upscale without moving into a larger class, that combination is a major part of its appeal.

For 2021, the Terrain’s lineup was simplified after the larger 2.0-litre engine option was dropped, leaving the 1.5-litre turbocharged engine as the only choice. That engine is paired with a nine-speed automatic, and the Terrain also offers Apple CarPlay and Android Auto, with wireless versions introduced for the 2022 model year. Safety equipment is another strength: for 2020, important features such as automatic emergency braking, forward collision alert with pedestrian detection, lane keep assist, lane departure warning, and automatic high beams became standard, and those additions help make the Terrain feel well equipped. Buyers who value a smooth ride, a roomy cabin, and strong value may find it especially appealing.

There are trade-offs, though. The Terrain’s cargo space behind the rear seat trails that of its most popular rivals, and some interior materials feel cheap. The 1.5-litre engine is sufficient for most driving tasks, but its highway acceleration isn’t very good, and it has a much lower towing rating than the more powerful engine that was available earlier in the generation. Even so, the 2021 GMC Terrain remains distinctive for blending a comfortable, feature-rich cabin with a premium-leaning presentation in a practical compact SUV package.

Other model years to consider

• 2023 GMC Terrain

  • Average price: $27,078.00 CAD
  • Good/great deal percentage: 32.4%
  • User rating: 5 / 5
  • Total listings: 210

• 2024 GMC Terrain

  • Average price: $29,698.00 CAD
  • Good/great deal percentage: 34.0%
  • User rating: 5 / 5
  • Total listings: 153

• 2019 GMC Terrain

  • Average price: $16,549.00 CAD
  • Good/great deal percentage: 23.6%
  • User rating: 5 / 5
  • Total listings: 72

This analysis is based on CarGurus' proprietary market data from September 2, 2026, CarGurus experts' opinions, and generative AI.