The GMC Sierra 1500 III, specifically the Crew Cab Short Box configuration with the 6.0-liter Vortec V8 engine and four-wheel drive, was a full-size pickup truck produced from 2007 to 2010. This generation, known as the GMT900, represented a significant update to GMC’s truck lineup, offering increased refinement, capability, and a more modern interior compared to its predecessors. The 6.0L V8/4WD/Automatic combination occupied a sweet spot in the Sierra 1500 range, providing a balance of power, towing capacity, and everyday usability for American truck buyers. It was positioned as a step up from the base 4.8L and 5.3L V8 options, appealing to those needing more substantial performance without the higher cost of the diesel variants.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 III (GMT900) Crew Cab Short Box |
| Type (Engine) | 6.0 Vortec V8 (367 Hp) 4WD Automatic |
| Start of production | 2007 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 6 |
| Doors | 4 |
| Fuel consumption (urban) | 18.1 l/100 km (13 US mpg) |
| Fuel consumption (extra urban) | 13.1 l/100 km (18 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Power | 367 Hp @ 5600 rpm |
| Torque | 508 Nm @ 4300 rpm (374.68 lb.-ft. @ 4300 rpm) |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | L76 |
| 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 | 9.6:1 |
| 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) |
| Max. weight | 3175 kg (6999.68 lbs.) |
| Trunk (boot) space – maximum | 1506 l (53.18 cu. ft.) |
| Fuel tank capacity | 98 l (25.89 US gal | 21.56 UK gal) |
| Length | 5844 mm (230.08 in.) |
| Width including mirrors | 2031 mm (79.96 in.) |
| Height | 1872 mm (73.7 in.) |
| Wheelbase | 3645 mm (143.5 in.) |
| Front track | 1730 mm (68.11 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 | 15.3° |
| Departure angle | 22.4° |
| Ramp-over (brakeover) angle | 19.3° |
| Drivetrain Architecture | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, automatic transmission Hydra-Matic |
| Front suspension | Independent coil spring |
| Rear suspension | Rigid axle suspension, Leaf spring |
| Front brakes | Ventilated discs, 330×30 mm |
| Rear brakes | Drum, 295×60 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/70 R17 |
| Wheel rims size | 7.5J x 17 |
Powertrain & Engine Architecture
The heart of this Sierra 1500 variant was the 6.0-liter Vortec L76 V8 engine. This engine was a member of the Vortec family, known for its robust construction and relatively simple design. The L76 featured a cast iron block with aluminum cylinder heads, a 9.6:1 compression ratio, and a hydraulically actuated overhead valve (OHV) valvetrain with two valves per cylinder. Fuel delivery was handled by a multi-port fuel injection system, providing precise fuel metering for optimal performance and efficiency. The engine produced 367 horsepower at 5600 rpm and 374.68 lb-ft of torque at 4300 rpm. This power was routed through a four-speed Hydra-Matic automatic transmission, a proven and reliable unit known for its smooth shifting characteristics. The 4WD system was typically a part-time system, allowing the driver to switch between two-wheel drive and four-wheel drive as needed.
Driving Characteristics
The 6.0L V8 provided ample power for daily driving and towing. While not as quick as some of the lighter-weight trucks or those equipped with the more powerful 6.2L engine, the Sierra 1500 with this configuration offered a comfortable and capable driving experience. The automatic transmission was well-matched to the engine’s torque curve, providing smooth acceleration and effortless cruising. The gear ratios were optimized for both on-road comfort and off-road capability. Compared to the 5.3L V8, the 6.0L offered a noticeable increase in power and towing capacity, making it a popular choice for those who frequently hauled trailers or heavy loads. However, fuel economy was predictably lower than the smaller engine options.
Equipment & Trim Levels
The Crew Cab Short Box 6.0L 4WD Sierra 1500 typically came standard with features like air conditioning, power windows and locks, a CD player, and cloth upholstery. Higher trim levels, such as the SLT, added features like leather upholstery, heated seats, a premium sound system, and chrome exterior accents. Optional extras included a navigation system, a sunroof, and a rear-seat entertainment system. The Crew Cab configuration offered spacious seating for up to six passengers, making it a practical choice for families.
Chassis & Braking
The GMT900 Sierra 1500 featured a fully boxed frame for enhanced rigidity and durability. The front suspension utilized an independent coil spring design, providing a comfortable ride and good handling. The rear suspension employed a traditional leaf spring setup, which was well-suited for carrying heavy loads. Braking duties were handled by ventilated discs up front and drum brakes in the rear. An anti-lock braking system (ABS) was standard equipment. The truck’s relatively high ground clearance (9.02 inches) made it capable of tackling moderate off-road terrain.
Market Reception & Comparison
The 6.0L V8-powered Sierra 1500 was generally well-received by critics and consumers alike. It was praised for its strong performance, comfortable ride, and spacious interior. However, its fuel economy was a common criticism, especially compared to newer trucks with more advanced engine technologies. Compared to the 5.3L V8, the 6.0L offered a significant boost in power and towing capacity, but at a higher price point. The 6.0L also proved to be a more reliable option than the later 6.2L engine, with fewer reported issues related to oil consumption and active fuel management.
Legacy
The GMT900 Sierra 1500, particularly the 6.0L V8 variant, has maintained a solid reputation for reliability and durability. The L76 engine is known for its longevity, and many examples are still on the road today. While fuel economy is not its strong suit, the truck’s robust construction and ample power make it a popular choice for those seeking a capable and dependable full-size pickup. In the used car market, these trucks typically command a higher price than those equipped with the smaller V8 engines, reflecting their greater capability and desirability.
