Discover the capability and refinement of the 2025 GMC Sierra 1500 AT4, a truck designed for those who demand both performance and sophistication in their daily drive.
- Power Sunroof
- Technology Package with Rear Camera Mirror and 15" Head-Up Display
- Premium Bose 7-Speaker Sound System with SiriusXM 360L
- AT4 Premium Package with Off-Road High Clearance Steps
- 3.0L I6 Engine with 10-Speed Automatic and 4WD
- LT265/60R20 Goodyear Wrangler Territory MT Tires
- Off-Road Suspension with Auto-Locking Rear Differential
- Multicolor 15" Diagonal Head-Up Display
- Bed View Camera with HD Surround Vision
- Heated and Ventilated Front Seats with Memory Functions
- Wireless Apple CarPlay and Android Auto
- Integrated Trailer Brake Controller
- Auto High-Beam Headlights with IntelliBeam
- Lane Keep Assist with Lane Departure Warning
- Spray-On Pickup Bedliner with GMC Logo
The Sierra 1500 AT4 comes equipped with a 3.0L I6 engine paired with a 10-Speed Automatic transmission and 4WD capability, delivering a practical balance of power and efficiency. With an EPA rating of 21 city and 24 highway miles per gallon, this truck handles both urban commutes and longer drives with reasonable fuel consumption. The Thunderstorm Gray exterior provides a distinguished appearance that stands out on any road.
This AT4 model represents GMC's commitment to off-road readiness without sacrificing on-road comfort. The off-road suspension, auto-locking rear differential, and high-clearance steps position this truck for varied terrain, while the integrated trailer brake controller and comprehensive camera system make towing and maneuvering straightforward and confident. The LT265/60R20 Goodyear Wrangler Territory MT tires offer dependable traction across different conditions.
Inside, you'll find thoughtfully integrated technology that keeps you connected and informed. The multicolor 15-inch head-up display projects critical driving information directly into your line of sight, while the rear camera mirror and bed view camera provide enhanced visibility from multiple perspectives. Wireless Apple CarPlay and Android Auto ensure your smartphone integrates seamlessly, and the premium Bose sound system delivers quality audio for your commute or adventure.
Comfort features include heated and ventilated front seats with 10-way power adjustment and lumbar support, memory settings for the driver's seat, and heated steering wheel functionality. The cabin is thoughtfully designed with dual-zone automatic temperature control, premium leather seat trim, and convenient placement of USB charging ports throughout. The split-folding rear seat adds flexibility for passengers or cargo.
Safety is addressed through a comprehensive suite of technologies including automatic emergency braking, lane keep assist with departure warning, forward and rear pedestrian detection, and a multiview camera system. The truck also features Ultrasonic Front & Rear Park Assist and a Safety Alert Seat to enhance your awareness on every journey.
This 2025 GMC Sierra 1500 AT4 gray truck is ready to serve your needs, whether that involves weekend adventures or daily professional use. Visit our showroom to experience the blend of capability, technology, and luxury this truck delivers.

