2026 GMC Sierra 3500HD AT4

Heated/Cooled Leather Seats, Navigation, Heated Rear Seat, 4x4, Aluminum Wheels, Bed Liner, Trailer Hitch. AT4 trim. READ MORE!KEY FEATURES INCLUDELeather Seats, 4x4, Heated Driver Seat, Heated Rear Seat, Cooled Driver Seat, Premium Sound System, Satellite Radio, Onboard Communications System, Aluminum Wheels, Remote Engine Start, Dual Zone A/C, WiFi Hotspot, Cross-Traffic Alert, Blind Spot Monitor, Heated Seats Privacy Glass, Keyless Entry, Steering Wheel Controls, Alarm, Electronic Stability Control. GMC AT4 with Summit White exterior and Jet Black with Kalahari accents interior features a 8 Cylinder Engine with 470 HP at 2800 RPM*.OPTION PACKAGESENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE (470 hp [350.5 kW] @ 2800 rpm, 975 lb-ft of torque [1322 Nm] @ 1600 rpm) (Includes (K05) engine block heater.), TECHNOLOGY PACKAGE includes (DRZ) Rear Camera Mirror and (UV6) Multicolor 15 Diagonal Head-Up Display, LPO, OFF-ROAD HIGH CLEARANCE STEP (dealer-installed), GOOSENECK / 5TH WHEEL PREP PACKAGE -- Hitch platform to accept Gooseneck or 5th Wheel hitch. Includes hitch platform with tray to accept ball, stamped bed holes with removable caps installed and bed mounted 7-pin trailer harness (similar to UY2 harness). AT4 PREFERRED PACKAGE includes (UG1) Universal Home Remote, (A48) rear sliding power window and (U01) Roof Marker Lamps, AUDIO SYSTEM, 13.4 DIAGONAL PREMIUM GMC INFOTAINMENT SYSTEM with Google built in apps such as navigation and voice assistance, includes color touch-screen, multi-touch display, AM/FM stereo, Bluetooth streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phones. (STD), TRANSMISSION, 10-SPEED AUTOMATIC.Horsepower calculations based on trim engine configuration. Please confirm the accuracy of the included equipment by calling us prior to purchase.