6.62ft Box Length - CONQUER EVERY TRAIL—THE 2023 GMC SIERRA 1500 AT4, RUGGED, READY AND BUILT FOR ADVENTURE. DURAMAX DIESEL, REAR CAMERA MIRROR, GMC PREMIUM INFOTAINMENT SYS. 13.4" DIAG COLOUR TOUCHSCREEN WITH GOOGLE BUILT-IN, HEATED STEERING WHEEL, ADAPTIVE CRUISE CONTROL, REAR SEAT WITH STORAGE PACKAGE, MULTIPRO TAILGATE