When General Motors began the GMC truck line in 1912, it stood on its own as a durable work truck. Over the next century, GMC seemed to be a Chevy truck clone with different trims, power and pricing variances. Building its own rep that included a perception of extra strength and ruggedness, GMC has sought to distance itself further from its Bow-tie sibling. With the 2020 GMC Sierra, the truck badge differentiates itself from its sister, the Chevrolet Silverado, with exclusive features and five engine options.

Mechanically, a Silverado twin, Sierra’s carbon-fiber bed option, six-function Multi-Pro Tailgate, and new Enhanced ProGrade Trailering System with 15 cameras, help give Sierra its own personality.

New for 2020, the Sierra Denali trim gets a 10-speed automatic transmission, up from an 8-speed last year. The new industry-first Carbon-fiber cargo box is available and was developed to increase durability, efficiency and functionality, while offering best-in-class dent, scratch and corrosion resistance. New features include adaptive cruise control, trailer tow mirrors, HD Surround Vision with two trailer camera provisions, and a trailer-tow bed-view camera system.

Sierra 1500 offerings include 6 trims, regular cab, double cab and crew cab body styles — all offered with 2WD or 4WD, and various box configurations.

Built for lightness with a mixed materials approach — including aluminum for the doors, hood and tailgate, with steel for the fenders, roof and standard cargo box, each of Sierra’s trims have styling nuances. I tested the top-of-the line Sierra Denali, distinguished by iconic design cues, a tall, strong, purposeful stance, accented by bold bodywork, chiseled shoulders and a tall, powerful hood, capped with a grille that’s big and bold.

The Sierra 1500 trims are muscular and versatile in three cab styles. Sierra’s length runs from 229.6 inches with a regular cab and 8-foot box, to 231.7 inches with either a double cab and 6-6 box or the crew cab and a 5-foot-8 box. The Crew and 6-foot-6-inch box is 241.3 inches long. The Sierra Denali I tested, with crew cab and short box, sat on a 147.4-inch wheelbase (regular cab models are on a 157-inch wheelbase). Width goes 81.2 inches and height is 75.5 inches. Curbweight for the 4WD short-box Sierra Denali Crew Cab is a robust 5040 lbs. (regular cabs go as low as 4520), and the max trailering rate is 12,200 lbs

GMC offers an engine for every taste … five of them -- 4.3-liter V-6, 5.3-liter V-8, 2.7-liter turbo, 6.2-liter V-8 or a 3.0-liter turbo-diesel. Fuel economy runs from 15 to 23mpg in city driving and from 19 to 26 mpg on the highway. Powerwise, the 4.3 gets you 285hp and 305 lb-ft; the 5.3 rates at 355hp/383 lb-ft; the 2.7 turbo runs 310hp/348lb-ft; the 6.2 delivers 420hp/460 lb-ft. and the 3.0-liter I-6 turbo pops 277hp/460 lb-ft.

My 6.2-liter Sierra Denali was an upgrade over the standard 5.3 and was rated at 15mpg/city and 20mpg/highway -- I averaged 18.0 mpg in my heavy-footed tests, and I pedal mashed often, with power answering when called. Handling was floaty and big-trucklike, and steering was a bit vague, but power was never in question. The 6.2 responded with a 6.1-second zero-to-60mph dash, and a 15.5-second quarter-mile, with excellent passing power and hesitant low-range response in town. The independent front suspension with coil-over-shock and twin-tube shock absorbers works well with the solid axle rear with semi-elliptic, variable-rate, two-stage multileaf springs, and splayed twin-tube shocks to glide over road ruts, but there is some float at speed and sway in quick turns.

Inside, Sierra Denali is a luxury truck with leather and the latest advances in connectivity, tech, environmental controls and safety included. Sierra Denali’s luxuriously crafted cabin is roomy with 43 inches of front headroom in the crew cab version and 40.1 in the rear. Legroom is a comfortable 44.5 inches up front and 43.4 in the cab, and shoulder room is 66.0 and 65.2.

The base regular cab, standard box 2020 GMC Sierra 1500 starts at $31,195 for 2WD and long box, and moves through multiple trims, cabs, beds and engines, topping out with the Denali trim short-box, basing at $50,690 with 2WD and the 5.3-liter engine. I upgraded to 4WD, which gave me the option to also upgrade to the 6.2-liter engine. The 4WD configuration added $3500, and the 6.2-liter was $2700 more than the 5.3, to change the base to $56,385. Carbon Black Metallic exterior paint added $495 and was mated to Jet Black Forge perforated leather appointed seat trim -- and black-on-black was a beast. Playing on the Black Carbon Fiber, my test truck added the CarbonPro Carbon Fiber Composite Bed, 22-inch High Gloss Black Wheels and Multi-Pro Audio System by Kicker, for an additional $3555 with the Denali CarbonPro Edition package. That set-up also came with a power sunroof, rear camera mirror, Automatic Emergency Braking, Lane Keep Assist with Lane Departure Warning, Forward Collision Alert, Following Distance Indicator, Head-Up Display, Adaptive Cruise Control – Camera, GMC MultiPro Power Steps, and more. Destination Freight charges of $1595 put the sticker-as-tested at $63,185, but a massive cash allowance discount of $6500 put my net price at $56,685, so check with your dealer and see if you can cash in on discounts.

> Visit www.CarlisleEvents.com for more on the automotive hobby.

Mike Blake, former editor of KIT CAR magazine, joined Carlisle Events as senior automotive journalist in 2004. He's been a "car guy" since the 1960s and has been writing professionally for about 30 years. </I>

Want to contribute to All About Cars?

E-mail Us