H3 HUMMER MANUAL
Maximum towing capacities were 3,000 lb (1,361 kg) for the straight-5 with manual transmission, 4,500 lb (2,041 kg) for the straight-5 with automatic transmission, and 6,000 lb (2,722 kg) for the V8 with automatic transmission. These upgrades increased ground clearance, suspension articulation, approach and departure angles, and increased the H3's undercarriage protection. The optional Adventure or Off Road package included 33-inch tires, off-road shocks, differential lockers and 4:1 low range gearing. It is also equipped with Stabilitrak stability control and ABS with variable brake force distribution assist. The H3 features a traction control that can use the brakes independently to stop wheelspin and improve traction while adjusting to road conditions. Front and rear recovery hooks were standard, with an optional trailer hitch and wiring harness. Standard ground clearance with the 31-inch tires was 9.7 in (246 mm) while the approach, departure, and breakover angles were 37.4°, 34.7°, and 22.1° respectively, allowing the H3 to scale a 16-inch (406 mm) vertical wall and negotiate grades of 60% and side slopes of 40%. Like the Hummer H2, the H3 can ford 27 inches (690 mm) of water (tested in depths up to 34 in or 864 mm) at a speed of 5 mph (8.0 km/h) and 20 in (508 mm) of water at a speed of 20 mph (32 km/h). Electronic locking front and rear differentials were optional. The H3 featured a two-speed, electronically controlled full-time four-wheel drive system that made it for both on-road and off-road driving. The H3X also came with exclusive colors of Sonoma Red Metallic or Desert Orange Metallic. It included the luxury package, 18-inch chrome wheels with unique center caps, chrome trim, chrome tube steps, a body-colored grille and a hard tire cover. The V8 version had lower fuel economy, estimated at 13 mpg ‑US (18 l/100 km) in the city, 16 mpg ‑US (15 l/100 km) on the highway, with a combined average of 14 mpg ‑US (17 l/100 km). Available solely with the automatic transmission, a 5.3 liter LH8 V8 engine producing 300 hp (224 kW) and 320 lbf⋅ft (434 N⋅m) of torque was added in 2008 for the Alpha model. Under revised EPA testing standards when equipped with either transmission this straight-5 engine achieved 14 mpg ‑US (17 l/100 km) in the city and 18 mpg ‑US (13 l/100 km) on the highway with a combined average of 15 mpg ‑US (16 l/100 km). In 2007 this engine was replaced by the 3.7 liter LLR that produced 242 hp (180 kW) and 242 lbf⋅ft (328 N⋅m) of torque, figures that were revised in 2009 to 239 hp (178 kW) and 241 lbf⋅ft (327 N⋅m). The H3 was launched with a 3.5 liter straight-5 cylinder L52 engine that produced 220 hp (160 kW) and 225 lbf⋅ft (305 N⋅m) of torque and was mated to a standard five-speed Aisin AR5 manual transmission or an optional Hydra-Matic 4L60-E four-speed automatic transmission.
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