Hummer

Ultium battery platform GM. 212.7kWh battery pack Edition 1. Three electric motors. 1000hp combined output. 15591Nm torque wheel. AWD all-wheel drive standard. CrabWalk diagonal driving. 4-wheel steering. Extract Mode lift 6 inches. Watts to Freedom launch mode. 0-60 mph 3.0 seconds. 529km range EPA. 350kW DC fast charging. 800V architecture. 5507mm length. 3406mm wheelbase. 4103kg curb weight. Four-door SuperCrew cab. Electric tailgate MultiPro. Infinity Roof removable panels. Super Cruise hands-free driving. Factory Two Tonawanda New York manufacturing. Zero emissions off-road capability. Supertruck category creation.

Ultium platform GM. 170kWh battery pack. Three electric motors available. 830hp top specification. AWD all-wheel drive. CrabWalk diagonal movement. Extract Mode terrain clearance. 0-60 mph 3.5 seconds. 483km range estimated. 350kW fast charging capability. 4999mm length. 3235mm wheelbase. 4000kg curb weight. Five-passenger SUV. Removable roof panels. Off-road focused design. Watts to Freedom acceleration. Super Cruise autonomy. Electric off-road pioneer. Hummer brand revival. GM electrification showcase. Premium pricing justified. Supertruck SUV variant.

6.5L turbo diesel V8. 195hp initial. 300hp later Alpha. 6.6L Duramax diesel final. Torque 520Nm to 765Nm various. 4-speed automatic transmission. AWD permanent all-wheel drive. Central tire inflation system. Portal axles ground clearance. 4686mm length. 3302mm wheelbase. 3496kg curb weight substantial. Two-door or four-door configurations. Open top wagon enclosed options. AM General manufacturing Indiana. Arnold Schwarzenegger advocacy. Celebrity association strong. Gulf War publicity. Military vehicle civilian. Extreme off-road capability. 16 inches ground clearance. 76cm water fording. Approach angle 72 degrees. Departure angle 37.5 degrees. Production ended 2006. Fuel economy regulations. Icon status earned.

6.0L Vortec V8. 325hp output. 490Nm torque. 6.2L V8 later 393hp. 4-speed automatic initially. 6-speed automatic later. AWD four-wheel drive. GM GMT820 platform. Chevrolet Tahoe based. 5171mm length. 3119mm wheelbase. 2903kg curb weight. Five-passenger seating standard. Seven-passenger option. Body-on-frame construction. Hummer styling iconic. Military aesthetic maintained. Off-road capability genuine. Approach angle 40.4 degrees. Departure angle 40 degrees. 254mm ground clearance. Fuel economy poor criticized. 10-12 mpg typical. Cultural symbol 2000s. Conspicuous consumption critique. Celebrity ownership common. Discontinued 2009 recession.

3.5L Vortec inline-5 220hp. 3.7L inline-5 242hp later. 5.3L V8 300hp Alpha. 4-speed automatic standard. 5-speed automatic later. 5-speed manual option inline-5. AWD four-wheel drive. GM GMT355 platform. Colorado Canyon based. 4742mm length. 2842mm wheelbase. 2132kg curb weight. Five-passenger capacity. Body-on-frame construction. Hummer styling scaled down. More fuel efficient versus H2. 13-14 mpg typical. Off-road capability maintained. Approach angle 45 degrees. Departure angle 37 degrees. 228mm ground clearance. Entry-level Hummer positioning. Volume sales model. Discontinued 2010 GM bankruptcy. Brand dormancy began.

The military-spec diesel V8 that powered the original Humvee. This 6,200cc 90° V8 featured a cast iron block with four-bolt main bearings and a forged steel crankshaft. The cylinder heads used pushrods with two valves per cylinder and hydraulic lifters. The fuel system employed a Stanadyne DB2 mechanical injection pump, while ignition used glow plugs for cold starting. With 21.3:1 compression, it produced 150 hp at 3,600 RPM and 250 lb-ft at 2,000 RPM. The engine featured a massive oil pan with 12-quart capacity and dual oil filters. Air intake used a Donaldson cyclone pre-cleaner system for extreme dust conditions. Cooling was handled by a massive radiator with separate transmission and engine oil coolers. This engine was designed for maximum reliability in battlefield conditions, capable of running on multiple fuel types including JP-8 jet fuel, with an expected service life of 5,000 hours between overhauls.

The civilian-optimized turbo diesel that brought Humvee capability to the public. This 6,500cc 90° V8 featured a cast iron block with four-bolt main bearings and a forged steel crankshaft. The cylinder heads used pushrods with two valves per cylinder and hydraulic lifters. The turbocharger was a Garrett GT series with wastegate control, producing 10 psi of boost. The fuel system used a Stanadyne DS4 electronic injection pump, while ignition employed glow plugs with advanced timing control. With 21.0:1 compression, it produced 195 hp at 3,400 RPM and 430 lb-ft at 1,800 RPM. The engine featured an enormous front-mounted air-to-air intercooler and central tire inflation system connection. Cooling used a massive aluminum radiator with electric fans and separate coolers for transmission, engine oil, and power steering. This engine could propel the 7,500-pound H1 to 60 mph in 18 seconds while achieving 10-12 MPG—remarkable for its size and capability.

The gasoline V8 that made Hummer accessible to the masses. This 5,967cc 90° V8 featured a cast iron block with six-bolt main bearings and a forged steel crankshaft. The cylinder heads used pushrods with two valves per cylinder and hydraulic roller lifters. The fuel system employed sequential port fuel injection with a composite intake manifold, while ignition used individual coil-near-plug units. With 9.4:1 compression, it produced 316 hp at 5,200 RPM and 360 lb-ft at 4,000 RPM. The engine featured a massive air intake system with water-fording capability and dual exhaust with stainless steel construction. Cooling was handled by a heavy-duty radiator with transmission and oil coolers integrated. Despite the H2's 6,400-pound weight, this engine provided reasonable performance with 0-60 mph in 10 seconds, though fuel economy rarely exceeded 10 MPG in real-world use.

The supercharged V8 that addressed the H2's performance deficit. This 6,162cc 90° V8 featured an aluminum block with six-bolt main bearings and a forged steel crankshaft. The cylinder heads used pushrods with two valves per cylinder and hydraulic roller lifters. The supercharger was an Eaton Gen 5 TVS unit producing 7 psi of boost, with an air-to-water intercooler integrated into the intake manifold. The fuel system employed sequential port fuel injection with larger injectors, while ignition used individual coil-on-plug units. With 9.0:1 compression, it produced 393 hp at 5,500 RPM and 415 lb-ft at 4,000 RPM. The engine featured a high-flow exhaust system and upgraded cooling with auxiliary transmission and oil coolers. This powertrain transformed the H2's performance, delivering 0-60 mph in 7.5 seconds while maintaining the same off-road capability and towing capacity of 8,000 pounds.

The unusual inline-five that powered the compact H3. This 3,700cc inline-five featured a cast iron block with four main bearings and a forged steel crankshaft. The cylinder heads used pushrods with two valves per cylinder and hydraulic roller lifters. The fuel system employed sequential port fuel injection with a composite intake manifold, while ignition used individual coil-near-plug units. With 10.0:1 compression, it produced 239 hp at 5,600 RPM and 241 lb-ft at 2,800 RPM. The engine featured a dual-path intake manifold for improved mid-range torque and a stainless steel exhaust system. While smaller than other Hummer powerplants, this engine provided adequate performance for the 4,700-pound H3, with 0-60 mph in 9.5 seconds and significantly better fuel economy than its larger siblings at 15-16 MPG highway.

The small-block V8 that created the ultimate compact Hummer. This 5,328cc 90° V8 featured an aluminum block with six-bolt main bearings and a forged steel crankshaft. The cylinder heads used pushrods with two valves per cylinder and hydraulic roller lifters with active fuel management (cylinder deactivation). The fuel system employed sequential port fuel injection with electronic throttle control. With 9.9:1 compression, it produced 295 hp at 5,200 RPM and 317 lb-ft at 4,000 RPM. The engine featured a dual-mode exhaust system and enhanced cooling package. This powertrain transformed the H3 into a genuine performance SUV, delivering 0-60 mph in 7.5 seconds while maintaining the same off-road credentials. The V8's torque advantage was particularly noticeable in low-speed rock crawling and high-speed desert running situations.

The inline-five adapted for Hummer's unique pickup truck. This 3,700cc inline-five shared its basic architecture with the H3 SUV version but featured calibration changes optimized for truck duties. The engine maintained the same 239 hp at 5,600 RPM but saw torque increased to 244 lb-ft at 4,600 RPM for improved towing capability. The cooling system was upgraded with a larger radiator and auxiliary transmission cooler to handle the 4,400-pound towing capacity. The engine featured a revised exhaust system with reduced backpressure and an intake system optimized for low-end torque. While not powerful by modern standards, this engine provided adequate performance for the 5,100-pound pickup, with the unique five-cylinder configuration giving the H3T distinctive character among American trucks.

The modern diesel V8 that created the ultimate civilian Hummer. This 6,599cc 90° V8 featured a compacted graphite iron block with four-bolt main bearings and a forged steel crankshaft. The cylinder heads used pushrods with two valves per cylinder and hydraulic lifters. The turbocharger was a Garrett GT37 variable geometry unit producing 20 psi of boost. The fuel system used Bosch high-pressure common-rail injection operating at 23,000 psi, while ignition employed glow plugs with advanced control. With 17.5:1 compression, it produced 300 hp at 3,100 RPM and 520 lb-ft at 1,800 RPM. The engine featured a massive front-mounted intercooler and comprehensive emissions equipment. This powertrain transformed the H1's driving experience, delivering 0-60 mph in 13.5 seconds—remarkable for an 8,500-pound vehicle—while achieving 15 MPG highway and providing 14,000-pound towing capacity.

The revolutionary electric powertrain that resurrects Hummer as a zero-emissions super truck. This system features three permanent magnet synchronous motors (one front, two rear) producing combined 1,000 hp (1,074 hp in Watts Mode) and 11,500 lb-ft of wheel torque. The front motor produces 235 hp, while each rear motor produces 470 hp, with all using hairpin winding technology and direct oil cooling. The power electronics employ silicon carbide MOSFETs with 97.5% efficiency. The battery is a 24-module Ultium pack using 800V architecture with nickel-cobalt-manganese-aluminum chemistry and active thermal management. The system features torque vectoring through independent rear motors and four-wheel steering. CrabWalk mode enables diagonal movement, while Extract Mode provides 15 inches of suspension lift. DC fast charging supports 350 kW capability, adding 100 miles of range in 10 minutes. The complete powertrain achieves 0-60 mph in 3.0 seconds in a vehicle weighing over 9,000 pounds—unprecedented performance for any vehicle, let alone an electric super truck.

The performance-focused version of Hummer's electric powertrain. This system features the same three-motor layout as the Edition 1 but with enhanced software calibration and thermal management. The combined output remains 1,000 hp (1,074 hp in Watts Mode) with 11,500 lb-ft of wheel torque, but with improved sustained performance during track use. The battery cooling system is upgraded with additional capacity to handle repeated high-power discharges. The torque vectoring system features more aggressive programming for improved handling dynamics. The powertrain maintains the 0-60 mph capability of 3.0 seconds but features improved repeatability and higher top speed. The 800V architecture supports 350 kW DC fast charging, with the battery management system optimized for frequent fast-charging sessions without degradation. This version represents the ultimate expression of electric off-road performance, blending supercar acceleration with unmatched terrain conquest capability.

The legendary, heavy-duty 4-speed automatic that served as the backbone of the original Hummer H1. This transmission was chosen for its ability to handle the massive torque output of the 6.5L Detroit Diesel Turbo-Diesel V8 and later the 6.6L Duramax. It was coupled with an enormous, specially calibrated torque converter and an external transmission oil cooler of immense capacity to manage heat during low-speed, high-load off-roading. The 4L80-E's simple, robust design was ideal for military-derived applications where absolute reliability was paramount over fuel efficiency or shift refinement. It was mated to a two-speed, gear-driven transfer case with a monumental low-range gear reduction, creating a drivetrain capable of crawling up near-vertical inclines and powering through deep water and mud.

The renowned 5-speed automatic used in the Hummer H2, specifically designed for high-torque gasoline and diesel applications. This transmission was the civilian counterpart to military-spec units and was celebrated for its seamless shift quality and exceptional durability. It featured a deep first gear for strong launches and a tall overdrive for highway cruising. Its key feature was the Driver Information Center, which displayed transmission fluid temperature—a critical gauge for off-roaders. The transmission's Tow/Haul mode recalibrated shift points, increased line pressure for firmer shifts, and enhanced engine braking on descents. It was paired with a full-time 4WD transfer case with a 2.64:1 low-range gear reduction, providing the H2 with formidable crawling capability and towing prowess.

The modern 6-speed automatic used in the high-performance H3 Alpha and H3T Alpha models, paired with the 5.3L V8 engine. This transmission brought additional gears and a wider ratio spread to the smaller Hummer, improving both off-the-line acceleration and highway fuel economy. It featured a sophisticated electronic control system with multiple shift maps, including one optimized for off-road use that would hold gears longer and provide more engine braking. The torque converter employed an aggressive lock-up strategy to reduce slippage. For the H3's application, it was coupled with an electronically controlled two-speed transfer case (BorgWarner 44-84) featuring a 4.03:1 low-range ratio, one of the deepest in the industry, which gave the V8-powered H3 exceptional rock-crawling capability.

The revolutionary electric drive system that powers the modern GMC Hummer EV. This setup features three permanent-magnet AC synchronous motors—one at the front axle and two at the rear—delivering a combined output of 1,000 hp. Crucially, this system eliminates the need for a traditional multi-speed transmission. Instead, each motor is connected to the wheels via a single-speed reduction gearset and a two-speed gearbox within the rear drive unit. This '2.5' speed setup allows for an ultra-low 'Torque Reduction' gear for mind-bending off-road crawling and incredible low-end torque, and a 'High Speed' gear for normal driving and top-speed runs. The system also enables Watts to Freedom (WTF) mode, a launch control function that orchestrates all three motors for a 0-60 mph time of approximately 3 seconds. Four-wheel steering (CrabWalk) and adaptive air suspension are fully integrated with the drive unit's control software.

The robust 5-speed manual transmission offered in the base and I5-powered Hummer H3. Sourced from Aisin, this gearbox was known for its durability and direct, truck-like shift feel. It featured a relatively low first gear, well-suited for slow-speed technical terrain, and an overdrive fifth gear for highway driving. The clutch was heavy-duty, designed to handle the low-end torque of the inline-5 engine. When equipped with the optional off-road package, it was paired with a manual, gear-driven transfer case (BorgWarner 44-77) with an incredibly deep 4.03:1 low-range ratio. This combination gave the driver complete mechanical control over the vehicle, allowing for precise throttle and clutch modulation when crawling over obstacles, a feature prized by purist off-road enthusiasts.

Born from AM General's 1983 HMMWV (High Mobility Multipurpose Wheeled Vehicle) military contract, Hummer gained Gulf War visibility in 1991 that caught Arnold Schwarzenegger's attention, leading to his request for a civilian version. The first civilian Hummer arrived in 1992 before GM purchased the brand in 1999, launching the H2 to the mainstream market in 2002 and the volume H3 model in 2005. Hummer became a cultural phenomenon of the 2000s but faced intense environmental criticism and fuel economy concerns that proved devastating during the 2008 financial crisis. GM discontinued the brand in 2010 amid bankruptcy, with an attempted Chinese sale failing and the brand remaining dormant for a decade. In a dramatic 2020 revival announcement, GM resurrected Hummer as an all-electric GMC sub-brand, debuting the Hummer EV in 2022 and creating the 'Supertruck' category that combines zero emissions capability with extreme off-road performance. The transformation from fuel-guzzling symbol of excess to cutting-edge electric performance vehicle represents one of automotive history's most dramatic brand reinventions—proving that military heritage and extreme capability can survive into an electric future when paired with the right technology and a willingness to fundamentally reimagine what a nameplate represents.