2007 GMC Sierra 3500HD III (GMT900) Crew Cab Long Box: Close-up of vehicle audio system and dual-zone climate control panel.

Detailed view of an in-car audio system featuring an XM radio display and dual-zone digital climate control with temperature and fan speed adjustment knobs.

View Dimensions of the 2007 GMC Sierra 3500HD III (GMT900) Crew Cab Long Box

View 30 images of the 2007 GMC Sierra 3500HD III (GMT900) Crew Cab Long Box

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