Sierra 3500 Denali HD sets a new standard for interior seating comfort.

Sierra 3500 Denali HD sets a new standard for interior seating comfort.

A Color Touch Radio with Intellilink and an 8” diagonal screen is standard on the Sierra 3500 Denali HD.

A Color Touch Radio with Intellilink and an 8” diagonal screen is standard on the Sierra 3500 Denali HD.

Forward Collision Alert helps prepare you for the unexpected. 

Forward Collision Alert helps prepare you for the unexpected.

Easy-to-reach controls offer safety and convenience features. Shown with available features.

Easy-to-reach controls offer safety and convenience features. Shown with available features.

Sierra 3500 Denali HD with Jet Black interior.

Sierra 3500 Denali HD with Jet Black interior.

Available premium materials include durable soft-touch materials on the instrument panel and aluminum accents on the instrument panel, steering wheel, and center console.

Standard premium materials include durable soft-touch materials on the instrument panel and aluminum trim accents on the instrument panel, steering wheel, and center console.

Sierra 3500 Denali HD offers spacious and flexible center console storage.

Sierra 3500 Denali HD offers spacious and flexible center console storage.

Rear seat leg room in crew cabs has been increased by 2″ for easier entry/exit and comfort.

Rear seat leg room in crew cabs has been increased by 2″ for easier entry/exit and comfort.

Premium materials and an intuitive layout create a refined and comfortable cabin.

Premium materials and an intuitive layout create a refined and comfortable cabin.

Premium, comfortable interior, larger rear doors and a new seat design result in easier entry and exit for passengers.

Premium, comfortable interior, larger rear doors and a new seat design result in easier entry and exit for passengers.