GMC Canyon II (AT2) (2015 – 2022)

Reliability score : 8.5/10

The second-generation GMC Canyon (code name AT2) marks General Motors' return to the midsize pickup segment. A technical twin to the Chevrolet Colorado, the Canyon distinguishes itself with a more premium positioning, a design inspired by its big brother the Sierra, and superior trims (notably the luxurious Denali version). Its major asset in this North American segment is the introduction of a 4-cylinder diesel engine (2.8L Duramax), offering exceptional towing capacities and rare fuel efficiency for the category. According to data from J.D. Power and Consumer Reports, it ranks among the best in its class in terms of long-term reliability.

✅ Strengths

Overall reliability above the category average (J.D. Power / Consumer Reports)
Exceptionally robust and durable 2.8L Duramax diesel engine
Impressive towing capacities for a midsize pickup (up to 3,490 kg with the diesel)
Very robust Hydra-Matic 8-speed automatic gearbox (on V6 LGX)
Interior finish and soundproofing superior to its twin, the Chevrolet Colorado

⚠️ Weaknesses

Numerous early recalls on the 2015 model year (steering, airbags, brakes)
2.5L petrol engine a bit weak under load
High used purchase price, particularly for the diesel and Denali versions

🎯 Verdict

The second-generation GMC Canyon is an excellent choice in the midsize pickup market. Reliability data (ADAC, TÜV, J.D. Power) places it above its category average. The 2.8L Duramax diesel engine is the true star of the lineup: it offers exceptional longevity, controlled fuel consumption, and top-tier towing capacities, provided the accessory belt and injector seals are monitored. The 3.6L V6 (especially the post-2017 LGX) is also an extremely solid choice. However, it is strongly advised to avoid the 2015 model year, which suffered early production teething problems with numerous recalls (steering, brakes, airbags). From 2016 onwards, and particularly after 2017, it is a highly recommended purchase.

Common issues

Défaillance de la pompe à vide (assistance au freinage) High

🔧 80 000 – 160 000 km

💶 600 – 1 200 $US

Vérifier l'assistance au freinage lors de l'essai routier. Une pédale dure est un signe.

Encrassement du filtre à particules diesel (FAP/DPF) Medium

🔧 80 000 – 150 000 km

💶 500 – 1 000 $US (nettoyage/capteur)

Privilégier les longs trajets routiers pour permettre les régénérations du FAP.

Problèmes de vanne/refroidisseur EGR (encrassement, fuite) Medium

🔧 100 000 – 180 000 km

💶 800 – 1 500 $US

Surveiller les voyants moteur et les pertes de puissance. Un nettoyage préventif peut aider.

Dysfonctionnements du système DEF (AdBlue) (capteurs, chauffage) Medium

🔧 100 000 – 200 000 km

💶 700 – 1 400 $US

Utiliser un DEF de qualité et éviter de rouler avec un réservoir vide.

Estimated maintenance costs

Oil change	£80 – 150
Timing belt	£850 – 1,500
Complete brakes	£280 – 550
Estimated annual budget	£650 – 1,200

Indicative estimates (independent garage, UK market). Prices vary by region and year.