The 2014 Chevrolet Silverado 1500 and High Country and the GMC Sierra and Sierra Denali 1500, which will be available this fall, will feature a 6.2L V-8 that can produce an SAE-certified 420 hp  and 460 lb.-ft. of torque.

The 6.2L V-8 available for Silverado LTZ and High Country and Sierra SLT and Denali models also delivers maximum available trailering capacity of 12,000 pounds when properly equipped, according to the automaker.

The optional Max Trailering Package is available on 2WD and 4WD V-8 crew cab and double cab models and includes:

• Trailering package with seven-pin and four-pin connector.

• Enhanced cooling.

• Automatic locking rear differential.

• Heavy-duty 9.75-inch rear axle with 3.73 ratio.

• Increased-capacity rear leaf springs.

• Revised shock tuning for increased control.

• Integrated trailer brake controller.

In addition to the 6.2L V8, Silverado 1500 and Sierra 1500 will offer a 4.3L V-6 SAE-certified at 285 hp and 305 lb.-ft. of torque and a 5.3L V-8 certified at 355 hp and 383 lb.-ft. of torque.

Silverado and Sierra trucks equipped with the 4.3L V-6 will have available towing ratings of up to 7,600 pounds. Silverado and Sierra trucks equipped with the 5.3L V-8 and the max towing package, available later this year, will have towing ratings of up to 11,500 pounds when properly equipped, according to the automaker.

All three engines feature direct fuel injection, active fuel management (cylinder deactivation) and continuously variable valve timing, a combination not found in competitor vehicles. The engines also use a compact overhead-valve design and weight-saving components such as aluminum blocks and cylinder heads to reduce mass for additional energy savings, according to the automaker.

The 5.3L V-8 has EPA-estimated fuel economy of up to 23 mpg highway (2WD models). EPA fuel economy estimates for the 6.2L V-8 will be finalized in the near future.