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Car video reviews:

Body style: Truck
Segment: Heavy Duty Pickup
Infotainment: Apple CarPlay icon Apple CarPlay   Android Auto icon Android Auto  

GMC released the Sierra AT4 in 2018 as a leading competitor for the reigning Ford F150, but not any 150; the Raptor version.

The half-ton pickup-trucks were often used for off-roading situations, and the carmakers made them more and more capable of getting in the middle of nowhere and back without too much fuss. But in the end, it all comes to the ground clearance, tires, power, and traction. When any of these is gone, the others can't do anything. GMC tried to solve as many problems as possible, giving more power, more traction, and better ground clearance to the Sierra in the AT4 form.

The first noticeable difference between an AT4 and a regular Sierra was the height. With a 2" lift kit fitted as standard, the AT4 was taller and thus appeared more impressive on the road. At the front, the big headlights and the black grille dominated the roads ahead. Unlike its siblings, it featured two red tow-hooks at the front. On its sides, the plastic moldings inside the wheel-wells made the gap seems smaller, but it was tall enough to put a six-pack on the wheel without any trouble.

The interior was fit for an overnight stay if stranded in the woods. It was wide, spacious, and could fit up to five people, but only two could sleep well on the wide front seats, separated by a center console, wide enough to serve as a nightstand. GMC installed a color head-up display for the driver and a rear camera mirror.

GMC offered the Sierra AT4 with a standard 5.3-liter V8 engine, while a 6.2-liter V8 and a 3.0-liter turbo-diesel were offered as an option. For better traction, the carmaker installed a standard rear differential lock and a two-speed transfer case.

GMC Sierra AT4  2018 - Present 10 Photos
GMC Sierra AT4  (2018 - Present)GMC Sierra AT4  (2018 - Present)GMC Sierra AT4  (2018 - Present)GMC Sierra AT4  (2018 - Present)GMC Sierra AT4  (2018 - Present)GMC Sierra AT4  (2018 - Present)GMC Sierra AT4  (2018 - Present)GMC Sierra AT4  (2018 - Present)GMC Sierra AT4  (2018 - Present)GMC Sierra AT4  (2018 - Present)
press release
GMC Sierra AT4 2018 - Present
  3 gasoline engines
  • 2.7L V8 8AT (310 HP)
  • 5.3L V8 10AT
  • 6.2L V8 10AT (420 HP)

GMC Sierra AT4 2.7L V8 8AT (310 HP)

ENGINE SPECS  –  2.7L V8 8AT (310 HP)
Cylinders
L4
Power
228 KW @ 5600 RPM
310 HP @ 5600 RPM
306 BHP @ 5600 RPM
Torque
349 lb-ft @ 1500-4500 RPM
473 Nm @ 1500-4500 RPM
Fuel System
Turbocharged Direct Injection
Fuel
Gasoline
Fuel capacity
24 gallons (90.8 L)
TRANSMISSION SPECS
Drive Type
All Wheel Drive
Gearbox
8-speed automatic
BRAKES SPECS
Front
Ventilated Discs
Rear
Ventilated Discs
TIRES SPECS
Tire Size
255/70 R17
DIMENSIONS
Length
232.1 in (5895 mm)
Width
81.2 in (2062 mm)
Height
75.6 in (1920 mm)
Wheelbase
147.4 in (3744 mm)

GMC Sierra AT4 5.3L V8 10AT

ENGINE SPECS  –  5.3L V8 10AT
Cylinders
V8
Displacement
5238 cm3
Power
261.1 KW @ 5600 RPM
355 HP @ 5600 RPM
350 BHP @ 5600 RPM
Torque
383 lb-ft @ 4100 RPM
519 Nm @ 4100 RPM
Fuel System
Turbocharged Direct Injection
Fuel
Gasoline
Fuel capacity
24 gallons (90.8 L)
TRANSMISSION SPECS
Drive Type
All Wheel Drive
Gearbox
10-speed automatic
BRAKES SPECS
Front
Ventilated Discs
Rear
Ventilated Discs
TIRES SPECS
Tire Size
255/70 R17
DIMENSIONS
Length
232.1 in (5895 mm)
Width
81.2 in (2062 mm)
Height
75.6 in (1920 mm)
Wheelbase
147.4 in (3744 mm)
WEIGHT SPECS
Unladen Weight
5007 lbs (2271 kg)
Gross Weight Limit
7300 lbs (3311 kg)
FUEL ECONOMY (NEDC)
City
15.1 mpg US (15.6 L/100Km)
Highway
21 mpg US (11.2 L/100Km)

GMC Sierra AT4 6.2L V8 10AT (420 HP)

ENGINE SPECS  –  6.2L V8 10AT (420 HP)
Cylinders
V8
Displacement
6162 cm3
Power
308.9 KW @ 5600 RPM
420 HP @ 5600 RPM
414 BHP @ 5600 RPM
Torque
460 lb-ft @ 4100 RPM
623 Nm @ 4100 RPM
Fuel System
Turbocharged Direct Injection
Fuel
Gasoline
Fuel capacity
24 gallons (90.8 L)
TRANSMISSION SPECS
Drive Type
All Wheel Drive
Gearbox
10-speed automatic
BRAKES SPECS
Front
Ventilated Discs
Rear
Ventilated Discs
TIRES SPECS
Tire Size
255/70 R17
DIMENSIONS
Length
232.1 in (5895 mm)
Width
81.2 in (2062 mm)
Height
75.6 in (1920 mm)
Wheelbase
147.4 in (3744 mm)
WEIGHT SPECS
Unladen Weight
5007 lbs (2271 kg)
Gross Weight Limit
7300 lbs (3311 kg)
FUEL ECONOMY (NEDC)
City
15.1 mpg US (15.6 L/100Km)
Highway
21 mpg US (11.2 L/100Km)
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