Other Model Years:
Other Model Years:
The 2023 GMC Sierra 3500HD Truck comes in only 1 body type: Truck. The Sierra 3500HD Truck is available in 5 different trim level options: Pro, SLE, SLT, AT4 and Denali. The Pro is the base trim level option, while the Denali is the highest, most expensive configuration.
In this guide, we will breakdown the differences between each GMC Sierra 3500HD Truck configuration and help you determine which trim level to purchase.
Below is a table comparing some of the major features for the most popular GMC Sierra 3500HD Truck trim levels.
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Pro | SLE | SLT | AT4 | Denali |
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| Engine | Duramax 6.6L Biodiesel Turbo V8 445hp 910ft. lbs. | 6.6L V8 401hp 464ft. lbs. | 6.6L V8 401hp 464ft. lbs. | 6.6L V8 401hp 464ft. lbs. | 6.6L V8 401hp 464ft. lbs. |
| Transmission | 6-Speed Shiftable Automatic Allison 10-Speed Shiftable Automatic Allison 10-Speed Shiftable Automatic w/Power Take-Off | 6-Speed Shiftable Automatic Allison 10-Speed Shiftable Automatic Allison 10-Speed Shiftable Automatic w/Power Take-Off | 6-Speed Shiftable Automatic Allison 10-Speed Shiftable Automatic | 6-Speed Shiftable Automatic Allison 10-Speed Shiftable Automatic | 6-Speed Shiftable Automatic Allison 10-Speed Shiftable Automatic |
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