2021 GMC Sierra 1500 AT4

2021 GMC Sierra 1500 4WD Crew Cab 147 AT4 â€" Duramax 3L I-6 diesel direct injection, DOHC, intercooled turbo, 277 HP with 10-speed automatic transmission. This rugged yet refined AT4 combines diesel torque and sophisticated tech so you can tow, explore, and commute with confidence.

AT4 Value Package â€" Delivers tangible enhancements that raise the truck’s capability and overall ownership value, giving you more useful equipment for everyday tasks and adventures.
Technology Package â€" Adds advanced imaging and driver information that make maneuvering the Sierra effortless; from multiple camera angles to a head-up display, it helps you see and react sooner for safer, smarter driving.
Driver Alert Package II â€" Focused on highway and urban safety, this package helps reduce strain during long drives with systems that monitor distance, lane position, and potential forward collisions so you can stay relaxed and protected.
AT4 CarbonPro Edition â€" Built for durability, this edition emphasizes tough, lightweight materials where they matter, providing a resilient bed and components that resist corrosion while maintaining a premium look.
Driver Alert Package I â€" Adds common-sense driver aids that simplify lane changes, parking and blind-spot awareness so everyday driving is more predictable and less stressful.
Preferred Equipment Group 4SB â€" Packs practical towing and convenience features into the package, making hitching, monitoring and trailering tasks easier to manage.
AT4 Preferred Package â€" Brings comfort and convenience together with premium audio, wireless charging and other creature comforts that elevate daily drives and long hauls alike.

This Sierra AT4 is designed around real-world usefulness. Smart device mirroring keeps your phone’s apps accessible through the infotainment system so navigation, music, and communication are easier and safer to use on the road. A built-in mobile hotspot means your devices stay connected without burning through phone data, ideal for work or family trips. The rear camera and high-resolution camera suite in the Technology Package give you clearer views when reversing, hitching, or navigating tight spaces, turning tricky maneuvers into straightforward ones.

Safety systems are prominent and proactive. Forward collision mitigation and front pedestrian impact prevention continually scan ahead and step in to reduce collision risk, while lane departure prevention and adaptive cruise control help maintain lane position and safe following distance with minimal driver effort. Brake assist adds an extra measure of stopping power in emergencies, and steering-wheel cruise controls put essential functions at your fingertips for less fatigue on long drives.

Altogether, the 2021 GMC Sierra 1500 AT4 blends diesel performance, purposeful materials and a suite of driver aids to provide a pickup that’s as capable on the jobsite as it is comfortable on the road. If you want a tr