Our Mack Granite GU813 Medium Duty Box Trucks are available and ready for you now. Click on any of the Mack Granite GU813 units shown below to review each unit’s details, including rear and/or sliding-side doors to meet your business’s needs. If you don't see the Mack Granite GU813 Medium Duty Box Trucks you need, then call us at 1-866-309-1962 today.