Our Mack GU813 Light and Medium Duty Trucks are available and ready for you now. Click on any of the Mack 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 GU813 Light and Medium Duty Trucks you need, then call us at 1-866-309-1962 today.