* Based on opinions and should be considered as general guidance only.
- Reliability (3)The H3 is mechanically sturdy, but 2006 models are prone to specific issues like cylinder head failures and leaky sunroof drains.
- Maintenance (3)Most mechanical components are shared with the Chevrolet Colorado making engine parts affordable, but Hummer-specific body panels and trim are becoming increasingly difficult and expensive to find.
- Technology (2)Very basic interior tech even for 2006; it lacks modern infotainment options and features a very standard GM parts-bin instrument cluster and audio system.
- Comfort (3)While the ride quality is surprisingly smooth on pavement, the cabin feels claustrophobic due to the high beltline and small windows, which severely limit outward visibility.
- Dynamics (2)The 3.5L inline-5 engine feels significantly underpowered for a vehicle of this weight, leading to sluggish highway merging, although its off-road crawling capabilities are excellent.