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2026 GMC Sierra AT4X

Truck · 6.2L V8 · 4WD

77/100

AutoVault's overall score, weighted for what a truck is actually for — performance, technology, comfort, reliability, safety and value.

Specifications

Engine6.2L V8
Horsepower420 hp
Torque460 lb-ft
0–60 mph5.4 sec
Top speed112 mph
Drivetrain4WD
Seats5
Combined MPG12 mpg (10 city / 15 hwy)
Range215 miles
MSRP$79,600
Body styleTruck

The verdict

What's good

  • Factory off-road hardware included
  • Satisfying V8 rumble
  • Luxurious yet rugged interior
  • Strong towing muscle

What's not

  • Heavy fuel appetite
  • Cumbersome in tight quarters
  • Wide turning radius
  • Firm ride without a load

The engine

L87

6.2L V8

GMC's 6.2-liter small-block V8 delivers the deep, effortless torque that defines a full-size American truck — quiet when cruising, muscular when towing, in Denali and AT4X flagships.

A direct descendant of Chevrolet's 1955 small-block, this pushrod V8 pairs old-school simplicity with modern cylinder deactivation and direct injection.

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