* Based on opinions and should be considered as general guidance only.
- Reliability (4)The engine and transmission are exceptionally durable, though the 2008 LMM Duramax introduced early emissions components that may require attention over time.
- Maintenance (3)Heavy-duty diesel maintenance is inherently expensive due to high fluid capacities and the premium cost of heavy-duty tires and brakes.
- Technology (2)Highly outdated by modern standards; the infotainment is basic, and it lacks contemporary driver assistance features or smartphone integration.
- Comfort (4)The SLT trim features leather-appointed seating and a surprisingly quiet cabin for a diesel, providing a near-luxury experience for long-distance hauling.
- Dynamics (4)Equipped with the Duramax/Allison powertrain, this truck offers class-leading towing stability and torque, though the steering feels heavy and the ride is stiff when the bed is empty.