GMC Sierra 1500 2026

2026 GMC Sierra 1500 AT4 Diesel Crew Cab

The brand-new 2026 GMC Sierra 1500 AT4 combines a powerful 3.0L diesel engine with rugged 4x4 capability, delivering the efficiency and torque that truck buyers demand. The AT4 trim is built for all-terrain confidence, and this truck arrives with modern driver assistance technology including adaptive cruise control, lane departure warning, and rear parking sensors to make every drive smoother and safer.

Inside, you’ll find practical comfort features that make long drives enjoyable: a heated steering wheel, automatic climate control, and power seats adjust to your preference. Navigation keeps you on course, while steering wheel audio controls let you manage entertainment without taking your hands off the wheel. An auto-dimming rearview mirror adds a thoughtful touch to everyday driving.

Key Features

• Powertrain: 3.0L diesel engine with automatic transmission and 4x4 drivetrain for efficient, capable hauling
• Driver Assistance: Adaptive cruise control, lane departure warning, rear parking assist sensors
• Comfort & Convenience: Heated steering wheel, automatic climate control, power seats, navigation system
• AT4 PREMIUM PACKAGE: Universal Home Remote, rear sliding power window, Off-Road High Clearance Steps
• Technology: Steering wheel audio controls, auto-dimming rearview mirror, Rear Camera Mirror, Multicolour 15-inch Diagonal Head-Up Display
• Trim: AT4 package emphasizes all-terrain capability and rugged capability