GMC Sierra Denali
GMC Sierra Denali
GMC Sierra Denali

2020 GMC Sierra Denali crew cab

Pros: Broad range of powertrains, models, and body configurations to choose from; passenger and cargo room; simple controls; available well-equipped Denali models; exclusive available features

Cons: Ride comfort and interior ambiance don’t match Ram 1500; front and side roof pillars impede visibility

CG Says: The 2020 GMC Sierra adds a new turbodiesel 3.0-liter in-line 6-cylinder engine option that has 277 horsepower and 460 lb-ft of torque. Also, newly available are adaptive cruise control, a bed-view camera, and a surround-view system with trailer cameras. The Dynamic Active Fuel Management version of the 5.3-liter V8 now has a 10-speed automatic on 4WD models. The GMC Sierra is a full-sized pickup that was redesigned last year. The Sierra shares a platform and powertrains with the Chevrolet Silverado (which was also redesigned last year), but has unique styling, along with a different equipment mix and a generally more upscale ambiance. The 420-hp 6.2-liter and 355-hp 5.3-liter V8s have stop/start technology and a fuel-saving Dynamic Active Fuel Management system that can run on two, four, six, or eight cylinders as driving conditions warrant. Sierra has another 5.3-liter V8 that also develops 355 hp, but it has Active Fuel Management that can deactivate only up to half of the cylinders. Rounding out the engine chart are a 285-hp 4.3-liter V6 and a 310-hp turbocharged 2.7-liter 4-cylinder, both with Active Fuel Management and stop/start technology. The diesel, 6.2-liter V8, and 5.3-liter V8 with Dynamic Active Fuel Management and 4WD have a 10-speed automatic transmission. The turbo four and the 5.3-liter V8 with Dynamic Active Fuel Management and 2WD have 8-speed automatics, while the 4.3-liter V6 and the 5.3-liter V8 with Active Fuel Management have 6-speed autos. Full-time four-wheel drive with a 2-speed transfer case is available.

Available features include power-opening and closing tailgate, head-up instrument display, push-button start, rearview camera mirror, and a camera that can be affixed to the back of a trailer to aid reversing. Exclusive to Sierra is a MultiPro tailgate with a separately hinged “mini-gate” section that can be opened in several handy positions. Also exclusive is an off-road-oriented AT4 model with a raised ride height and all-terrain tires. Available safety features include forward-collision warning with pedestrian detection and low-speed automatic braking, lane-departure warning, lane-keep assist, blind-spot alert, and rear cross-traffic alert. Sierra is offered in regular-cab, extended-cab, and crew-cab versions. The Ram 1500 might still the best-riding full-size pickup, but the new Sierra also rides quite well; it also has fine handling for a large pickup. Plus, Sierra offers a number of exclusive available features, such as the aforementioned MultiPro tailgate, an available CarbonPro carbon-fiber pickup box, and upscale Denali trim with Adaptive Ride Control suspension. Add that to its wide range of powertrains and features, and the redesigned Sierra should have something to satisfy any full-size truck buyer.

The Facts
Class Large Pickup Truck
Body Style(s) regular cab, extended cab, crew cab
Passenger Count passenger number
Drive Wheels 3 to 6
Manufacturer GMC
Nation of Manufacture USA Mexico
Base Prices (Only select models listed)
Base regular cab, 8-ft bed: $31,195
4WD Base regular cab, 8-ft bed: $35,795
2WD Base Double Cab, 6.6-ft bed: $32,095
2WD Elevation Double Cab, 6.6-ft bed: $41,895
4WD AT4 Double Cab, 6.6-ft bed: $52,595
2WD Base Crew Cab, 6.6-ft bed: $37,795
4WD SLT Crew Cab, 5.8-ft bed: $51,795
4WD AT4 Crew Cab, 5.8-ft bed: $54,995
4WD Denali Crew Cab, 6.6-ft bed: $60,290

Base Engine
turbocharged 2.7-liter 4-cylinder
Horsepower
310
Std. Transmission
8-speed automatic
Avail. Transmission
NA
EPA City Range (mpg)
19-20
EPA Hwy Range (mpg)
22-23

Optional Engine
4.3-liter V6
Horsepower
285
Std. Transmission
6-speed automatic
Avail. Transmission
NA
EPA City Range (mpg)
15-16
EPA Hwy Range (mpg)
20-21

Optional Engine
5.3-liter V8 (Active Fuel Management)
Horsepower
355
Std. Transmission
6-speed automatic
Avail. Transmission
NA
EPA City Range (mpg)
14-16
EPA Hwy Range (mpg)
18-21

Optional Engine
5.3-liter V8 (Dynamic Active Fuel Management)
Horsepower
355
Std. Transmission
8-speed automatic
Avail. Transmission
10-speed automatic
EPA City Range (mpg)
16-17
EPA Hwy Range (mpg)
21-24

Optional Engine
6.2-liter V8
Horsepower
420
Std. Transmission
10-speed automatic
Avail. Transmission
NA
EPA City Range (mpg)
15
EPA Hwy Range (mpg)
19-20

Optional Engine
turbodiesel 3.0-liter 6-cylinder
Horsepower
277
Std. Transmission
10-speed automatic
Avail. Transmission
NA
EPA City Range (mpg)
22-23
EPA Hwy Range (mpg)
26-30