* Based on opinions and should be considered as general guidance only.
- Reliability (5)The GMT900 heavy-duty platform is highly regarded for its longevity, with the engine and transmission combination capable of exceeding 300,000 miles with proper care.
- Maintenance (3)Diesel maintenance is costly due to high oil capacity and expensive fuel filters, but the widespread availability of parts helps keep labor costs competitive.
- Technology (2)Extremely dated by modern standards; while it features Bose audio and basic Bluetooth for phone calls, it lacks any modern infotainment or navigation capabilities.
- Comfort (4)As the SLT trim, the leather-appointed interior and dual-zone climate control offer a premium feel, with surprisingly low wind noise for a heavy-duty vehicle.
- Dynamics (4)The pairing of the Duramax diesel and Allison transmission provides class-leading towing stability, though the unladen ride remains stiff and truck-like.