Up for sale is my 2022 GMC Sierra 1500 AT4 in stunning Onyx Black, powered by the capable and fuel-efficient 3.0L Duramax inline-6 diesel engine. This is a well-equipped, truck that performs as good as it looks. This truck has been meticulously cared for with oil changes done every 5k miles, transmission was serviced 2.5k miles ago and I've run an Archoil Premium fuel additive since I've owned it. This was supposed to be my forever truck but my towing needs have unexpectedly increased so I need to get into a a 3/4 ton. Still covered under GM's Powertrain Limited Warranty until 100k miles.

AT4 Package Highlights:

-Off-road suspension with Rancho shocks

-Skid plates for underbody protection

-MultiPro Auto-Tailgate

-AT4 badging and blacked-out trim

-Premium interior with heated/ventilated seats

-Heated steering wheel

-13.4” infotainment display (Apple CarPlay/Android Auto)

-Brand new tires (less than 500 miles)

Driver Assistance & Safety Tech:

-Adaptive Cruise Control

-Forward Collision Alert with Heads-Up warning indicator

-Front & rear proximity sensors

-Lane Keep Assist with Lane Departure Warning

-Blind spot monitoring

-Automatic High Beam assist

-360° 4K surround-view camera system

-Forward and rear obstacle cameras

-Auto-Folding Side Mirrors

-Hill Descent Control

Notable Upgrade:

Fitted with an upgraded PPE high-capacity transmission pan, providing improved fluid capacity and better thermal management — a smart investment for towing and long-term transmission health.

Why the 3.0L Duramax Diesel?

Outstanding torque for towing, with real-world highway fuel economy that gas engines simply can’t match. Best of both worlds for work and daily driving.