The most significant update for the 2017 Colorado is an all-new V-6 engine and eight-speed transmission, creating a combination that’s unmatched in the midsize segment.
This second generation of Chevrolet’s double-overhead-cam engine architecture retains the same 3.6L displacement as before, with an updated suite of advanced engine technologies. This includes improved variable valve timing for intake and exhaust, improved direct injection and for the first time, Active Fuel Management (cylinder deactivation), which disables two cylinders under light throttle applications. Horsepower and torque increase to an SAE-certified 308 hp (230 kW) at 6,800 rpm and 275 lb-ft (373 nM) at 4,000 rpm.
The engine is mated to the class-exclusive eight-speed automatic. The GM-developed Hydra-Matic 8L45 is roughly the same size and weight as the 6L80 six-speed automatic it replaces. However, the eight-speed automatic offers a wider 7.0 overall gear ratio spread than the 6L80 transmission’s 6.0 ratio. This results in a numerically higher first gear ratio, helping drivers start off more confidently with a heavy load or when trailering, and numerically lower rear axle ratios that reduce engine rpm on the highway for improved efficiency.