2027 Chevrolet Colorado and GMC Canyon Gain 350-HP L4B

General Motors is fitting the 2027 Chevrolet Colorado and GMC Canyon with an updated version of its 2.7-liter TurboMax four-cylinder, now listed as production option code L4B and rated at 350 horsepower and 455 pound-feet (617 Newton-meters), the company said. The L4B replaces the previous L3B 2.7 that produced 310 horsepower and brings hardware developed for the all-new Silverado 1500 and Sierra 1500 into the mid-size twins.

The updated 2.7-liter TurboMax, option code L4B, raises output to 350 horsepower and 455 pound-feet (617 Newton-meters). GM’s technical notes for the Silverado and Sierra describe an enhanced turbocharger, revised fuel injection, updated active thermal management, redesigned pistons, and improved noise, vibration and harshness levels. Those same engineering changes are now making their way into Colorado and Canyon lineups, albeit not in identical packaging to the half-ton trucks.

Where the Silverado and Sierra pair the revised engine with a 10-speed automatic, Colorado and Canyon will retain the 8-speed automatic currently used with the L3B. GM has promised smoother shifts and stronger power delivery from the 10-speed in the 2027 Silverado and Sierra, which suggests the 8-speed in the mid-size trucks may receive minor updates for model year 2027 rather than a full transplant.

The extra horsepower does not increase maximum tow ratings for the midsize trucks. Colorado and Canyon continue to top out at 7,700 pounds, or 3,493 kilograms. Off-road oriented ZR2 and AT4X trims remain limited to 6,000 pounds (2,722 kilograms), while heavy-duty off-road packages such as Bison and AEV reduce the limit further to 5,500 pounds (2,495 kilograms) because of added equipment.

In absolute numbers the upgraded TurboMax sits between some direct rivals. Ford’s Ranger Raptor uses a twin-turbo V6 to produce 405 horsepower and 430 pound-feet (583 Newton-meters), while Toyota’s Tacoma i-FORCE MAX is rated at 326 horsepower and 465 pound-feet (630 Newton-meters) in optimal conditions. The L4B-powered Colorado and Canyon therefore enter the competitive conversation alongside six-cylinder and hybrid options as well as other four-cylinder setups.

Beyond the powertrain change, Chevrolet plans several model-year updates for Colorado including new paint colors, revisions to ZR2 equipment, and an optional power-adjustable front passenger seat. GMC’s Canyon will receive four new wheel designs, additional connectivity and convenience features, and new color choices.

Wentzville Assembly in Missouri will build the refreshed trucks. That plant also produces GM’s Chevrolet Express and GMC Savana full-size vans, which receive a 2027 tech update that adds a touchscreen display. Pricing and final specifications for the 2027 Colorado and Canyon will be announced closer to launch; the online configurator currently lists a 2026 Colorado starting at $32,400 and a 2026 Canyon starting at $38,900.

Production is expected to begin this October at GM’s Wentzville Assembly plant in Missouri.