The GMC Sierra 1500 III (GMT900) Crew Cab Short Box, equipped with the 6.0-liter Vortec V8 engine and a four-speed automatic transmission, represents a significant step in GMC’s full-size pickup truck offerings. Produced from 2010 to 2013, this variant was part of the GMT900 generation, a platform shared with Chevrolet Silverado models. Notably, this configuration incorporated a full hybrid electric vehicle (FHEV) system, aiming to improve fuel efficiency without sacrificing the capability expected of a full-size truck. Positioned as a mid-to-upper trim level, it offered a blend of power, technology, and comfort for buyers seeking a versatile and capable pickup.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 III (GMT900) Crew Cab Short Box |
| Type (Engine) | 6.0 Vortec V8 (332 Hp) 4WD Hybrid Automatic |
| Start of production | 2010 |
| End of production | 2013 |
| Powertrain Architecture | FHEV (Full Hybrid Electric Vehicle) |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 11.8 l/100 km (19.9 US mpg) |
| Fuel consumption (extra urban) | 10.2 l/100 km (23.1 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.9 kg/Hp |
| Weight-to-torque ratio | 5.3 kg/Nm |
| Battery voltage | 300 V |
| Battery technology | Nickel-metal hydride (NiMH) |
| Battery location | Under the rear seats |
| All-electric range | 1.6 km (0.99 mi) |
| Max speed (electric) | 48 km/h (29.83 mph) |
| Electric motor power | 82 Hp |
| Electric motor location | Between the combustion engine and the transmission |
| System power | 332 Hp @ 5100 rpm |
| System torque | 498 Nm @ 4100 rpm (367.31 lb.-ft. @ 4100 rpm) |
| Engine Power | 332 Hp @ 5100 rpm |
| Engine Torque | 498 Nm @ 4100 rpm (367.31 lb.-ft. @ 4100 rpm) |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LZ1 |
| Engine displacement | 5967 cm3 (364.13 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 101.6 mm (4 in.) |
| Piston Stroke | 91.95 mm (3.62 in.) |
| Compression ratio | 10.78:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant capacity | 13.6 l (14.37 US qt | 11.97 UK qt) |
| Kerb Weight | 2627 kg (5791.54 lbs.) |
| Max. weight | 3311 kg (7299.51 lbs.) |
| Max load | 684 kg (1507.96 lbs.) |
| Trunk (boot) space – maximum | 1506 l (53.18 cu. ft.) |
| Fuel tank capacity | 98 l (25.89 US gal | 21.56 UK gal) |
| Permitted trailer load with brakes (12%) | 2676 kg (5899.57 lbs.) |
| Length | 5839 mm (229.88 in.) |
| Width including mirrors | 2031 mm (79.96 in.) |
| Height | 1872 mm (73.7 in.) |
| Wheelbase | 3645 mm (143.5 in.) |
| Front track | 1732 mm (68.19 in.) |
| Rear (Back) track | 1702 mm (67.01 in.) |
| Ride height (ground clearance) | 229 mm (9.02 in.) |
| Minimum turning circle (turning diameter) | 14.4 m (47.24 ft.) |
| Approach angle | 15.5° |
| Departure angle | 23.1° |
| Ramp-over (brakeover) angle | 19.6° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 4 gears, automatic transmission |
| Front suspension | Independent coil spring |
| Rear suspension | Leaf spring |
| Front brakes | Ventilated discs, 330.2×30 mm |
| Rear brakes | Disc, 345×20 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 265/65 R18 |
| Wheel rims size | 8J x 18 |
INTRODUCTION
The 2010-2013 GMC Sierra 1500 Crew Cab Short Box with the 6.0L Vortec V8 and 4WD Hybrid Automatic powertrain was a notable offering in the full-size truck segment. Built on the GMT900 platform, this truck aimed to provide the capability expected of a Sierra 1500 while incorporating hybrid technology for improved fuel economy. The Crew Cab configuration offered spacious seating for five passengers, making it suitable for both work and family use. The short bed provided a balance between cargo capacity and maneuverability. This particular variant occupied a middle ground in the Sierra 1500 lineup, offering more power and features than the base models but falling short of the fully-equipped luxury trims.
Powertrain & Engine Architecture
At the heart of this Sierra 1500 is the 6.0-liter Vortec V8 engine, designated as the LZ1. This engine is a naturally aspirated, overhead valve (OHV) design, known for its robust construction and reliable performance. It features a cast iron block and aluminum cylinder heads. The engine utilizes multi-port fuel injection for precise fuel delivery. The hybrid system adds an electric motor positioned between the engine and the transmission, powered by a 300-volt nickel-metal hydride (NiMH) battery pack located under the rear seats. This configuration allows for limited all-electric driving (up to 1.6 km or 0.99 miles) at speeds up to 48 km/h (29.83 mph). The electric motor contributes an additional 82 horsepower, boosting the total system output to 332 horsepower and 498 Nm (367.31 lb.-ft.) of torque. The four-speed automatic transmission, while not the most modern, was chosen for its durability and ability to handle the engine’s torque output.
Driving Characteristics
The 6.0L V8 Hybrid powertrain delivered a respectable driving experience. While the electric motor provided a boost during acceleration, the overall performance was comparable to other 6.0L V8-equipped Sierra 1500s. The four-speed automatic transmission, however, lacked the refinement and efficiency of newer transmissions with more gears. Gear ratios were optimized for towing and hauling, resulting in a slightly lower engine RPM at highway speeds. Compared to the 5.3L V8 models, the 6.0L offered more power and torque, making it better suited for demanding tasks. However, it wasn’t as nimble or fuel-efficient as the smaller engine. The hybrid system’s contribution was most noticeable during initial acceleration and low-speed driving, where the electric motor assisted the gasoline engine.
Equipment & Trim Levels
The Sierra 1500 Crew Cab Short Box 6.0L Hybrid typically came standard with features such as air conditioning, power windows and locks, a CD player with an auxiliary input, and cloth upholstery. Higher trim levels added features like leather seats, a premium sound system, a navigation system, and a sunroof. Specific trim packages, such as SLE and SLT, offered varying levels of luxury and convenience. Optional extras included a trailer brake controller, a backup camera, and remote start. The interior design was functional and comfortable, with a focus on durability and ease of use.
Chassis & Braking
The GMT900 Sierra 1500 featured a body-on-frame construction, providing a robust and durable platform. The front suspension utilized independent coil springs, while the rear suspension employed leaf springs. This configuration was designed to handle heavy loads and provide a comfortable ride. The braking system consisted of ventilated discs at the front and discs at the rear. Anti-lock brakes (ABS) were standard. The 4WD system provided enhanced traction in challenging conditions. The truck’s relatively high ground clearance (229 mm or 9.02 in.) allowed for moderate off-road capability.
Market Reception & Comparison
The GMC Sierra 1500 Hybrid received mixed reviews. Critics praised the truck’s capability and comfortable interior, but the hybrid system’s fuel economy gains were often considered modest, especially given the added complexity and cost. Compared to the standard 6.0L V8 models, the hybrid version offered slightly better fuel economy in city driving, but the difference was not substantial. The hybrid system also added weight, which slightly impacted overall performance. Reliability was generally good, but the hybrid components introduced potential maintenance concerns. The Sierra 1500 Hybrid competed with other full-size trucks, such as the Ford F-150 and Chevrolet Silverado, which also offered hybrid options.
Legacy
The GMC Sierra 1500 III (GMT900) Crew Cab Short Box 6.0 Vortec V8 Hybrid represents an early attempt to integrate hybrid technology into the full-size truck segment. While the fuel economy benefits were not groundbreaking, it demonstrated GMC’s commitment to exploring alternative powertrains. Today, these trucks can be found on the used car market at relatively affordable prices. The 6.0L Vortec V8 is known for its durability, but potential buyers should be aware of the added complexity of the hybrid system and the potential for battery replacement costs. Overall, this variant remains a capable and comfortable truck for those seeking a blend of power, space, and a touch of hybrid technology.
