2020 GMC Sierra 1500 AT4

The newest generation of the GMC Sierra is a cool rig that sets itself apart from its Chevrolet sibling with tough looks – and the “AT4” model is the off-road variant that boasts a 2-inch lift, skid plates, a terrain-selectable traction control system, and a locking rear differential. This particular AT4 is equipped with the desirable 3.0-liter Duramax turbodiesel engine, and it’s been modified with a 6-inch lift, larger wheels and tires, Fox shocks, color-matched body trim, power-retractable side steps, a custom speaker system, and more.

2020 GMC Sierra 1500 AT4, finished in Summit White with a Jet Black and Kalahari interior.

According to the window sticker pictured in the photo gallery, this Sierra carried a sticker price of $65,460 and came equipped with the AT4 Premium, Technology, and Driver Alert packages, a locking rear differential, a MultiPro configurable tailgate, a power sunroof, heated and ventilated front seats, a heated steering wheel, and more as detailed below.
A partial list of modifications reported by the seller includes a set of 22-inch KG1 Forged wheels, a 6-inch BDS lift kit, Fox shocks, color-matched exterior trim, power-retractable side steps, and a bed tonneau cover.
GMC launched the current-generation Sierra for 2019. The truck was again related to the Chevrolet Silverado under the sheet metal but designers went to great lengths to differentiate the two models; they notably gave the front end a new look. GMC also offered some features that were not available to Chevrolet buyers at launch, like the clever MultiPro tailgate. Sierra production continues in 2022.
Power comes from a 3.0-liter turbodiesel inline-6 engine, rated at 277 horsepower and 460 lb-ft of torque. Output is directed to the rear or all four wheels through a 10-speed automatic transmission.

Equipment

A window sticker is provided in the photo gallery, and a partial list of notable equipment is shown below:

AT4 Premium Package (rear sliding power window, GMC premium infotainment, Bose premium sound system, wireless charging, front and rear park assist, lane change alert with side blind zone alert, rear cross traffic alert)
Technology Package (HD Surround Vision, rear mirror camera, bed view camera, multicolor head-up display, multicolor 8-inch digital driver info center)
Driver Alert Package II (forward collision alert, lane keep assist with lane departure warning, automatic emergency braking, front pedestrian braking, Intellibeam headlamps, adaptive cruise control, following distance indicator)
Locking rear differential
MultiPro configurable tailgate
Skid plates
Power sunroof
Leather upholstery
Power-adjustable heated and ventilated front seats
Heated rear outboard seats
60/40 split-folding rear bench seat
Heated steering wheel
Keyless entry
Remote start

Modifications

A partial list of modifications reported by the seller includes:

22-inch KG1 Forged wheels
BDS 6-inch lift kit and front upper control arms
2-inch leveling kit
Fox shocks
Trimmed front bumper
Color-matched exterior trim, tail light covers, and exhaust tips
Teal exterior emblems
Amp Research PowerStep side steps
Bed tonneau cover
(4) 8-inch Laser Industries subwoofers mounted under rear seat
1800W amplifier

Known Flaws

Chip on right-front door
Left-front wheel scratched
Left-front tire sidewall damaged (shown in gallery)

Other Items Included in Sale

2 keys
Window sticker
Owner’s manual
Engine block heater cable