The Chevrolet Suburban (GMT900) 6.0L i V8 16V AWD, produced from 2007 to 2009, represents a significant iteration of Chevrolet’s long-running full-size SUV. Part of the GMT900 platform generation, this Suburban variant occupied a premium position within the lineup, offering a blend of substantial towing capacity, passenger space, and V8 power. It was primarily marketed towards families and individuals requiring a large vehicle for both daily transportation and demanding tasks. The GMT900 series marked a shift towards more refined interiors and improved ride quality compared to its predecessors, while maintaining the Suburban’s reputation for rugged durability.
Technical Specifications
| Brand | Chevrolet |
| Model | Suburban |
| Generation | Suburban (GMT900) |
| Type (Engine) | 6.0 i V8 16V AWD (359 Hp) |
| Start of production | 2007 year |
| End of production | 2009 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 9 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.5 kg/Hp, 133.5 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 184 Nm/tonne |
| Power | 359 Hp @ 5400 rpm |
| Power per litre | 60.2 Hp/l |
| Torque | 495 Nm @ 4400 rpm, 365.09 lb.-ft. @ 4400 rpm |
| Engine layout | Front, Longitudinal |
| 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 | 92 mm, 3.62 in. |
| Compression ratio | 9.4:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 5.7 l, 6.02 US qt | 5.02 UK qt |
| Coolant | 16.9 l, 17.86 US qt | 14.87 UK qt |
| Kerb Weight | 2690 kg, 5930.43 lbs. |
| Max. weight | 3357 kg, 7400.92 lbs. |
| Max load | 667 kg, 1470.48 lbs. |
| Trunk (boot) space – minimum | 1297 l, 45.8 cu. ft. |
| Trunk (boot) space – maximum | 3890 l, 137.37 cu. ft. |
| Fuel tank capacity | 119 l, 31.44 US gal | 26.18 UK gal |
| Length | 5648 mm, 222.36 in. |
| Width | 2010 mm, 79.13 in. |
| Height | 1951 mm, 76.81 in. |
| Wheelbase | 3302 mm, 130 in. |
| Front track | 1732 mm, 68.19 in. |
| Rear (Back) track | 1702 mm, 67.01 in. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 4 gears, automatic transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Coil spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 265/65 R18 |
Powertrain & Engine Architecture
The heart of the 2007-2009 Chevrolet Suburban 6.0L AWD is the Vortec 6000 V8 engine. This engine, designated with various codes depending on specific calibration (often LY6), is a 5.967-liter (364.13 cubic inch) naturally aspirated V8. It features a cast iron block with aluminum cylinder heads, and a two-valve per cylinder configuration. The engine utilizes a multi-port fuel injection system, delivering fuel directly to each intake port. The Vortec 6000 is known for its robust construction and relatively simple design, contributing to its longevity. Paired with this engine is a four-speed automatic transmission (likely the 4L60E or 4L80E depending on specific configuration), chosen for its durability and ability to handle the engine’s torque output. The automatic transmission was calibrated for smooth shifts and optimized for towing, rather than outright performance.
Driving Characteristics
The 6.0L V8 and four-speed automatic combination in the Suburban delivers adequate, though not exhilarating, performance. Acceleration from 0 to 60 mph typically takes around 7.5-8.5 seconds, depending on load and road conditions. The automatic transmission’s gear ratios are geared towards maximizing towing capacity and fuel efficiency at highway speeds. Compared to the available 5.3L V8, the 6.0L offers noticeably more low-end torque, making it more capable when hauling heavy loads or navigating challenging terrain. However, the 6.0L’s fuel economy suffers slightly compared to the smaller engine. Compared to a manual transmission equipped Suburban (which were rare), the automatic provides a more relaxed driving experience, but sacrifices some driver control and responsiveness.
Equipment & Trim Levels
The 6.0L AWD Suburban typically came in higher trim levels, such as LT or LTZ. Standard features included tri-zone automatic climate control, power windows and locks, a premium sound system, and leather upholstery. LTZ trims added features like heated front seats, a power liftgate, and upgraded interior trim. Optional extras included a navigation system, rear-seat entertainment system, and sunroof. The interior design focused on providing a comfortable and spacious environment for passengers, with ample storage compartments throughout the cabin.
Chassis & Braking
The GMT900 Suburban utilizes a body-on-frame construction, providing a robust and durable platform. The front suspension features an independent McPherson strut design with coil springs and an anti-roll bar, while the rear suspension employs a solid axle with coil springs. This setup prioritizes ride comfort and load-carrying capacity. Braking duties are handled by disc brakes on all four wheels, with ABS (Anti-lock Braking System) as standard equipment. The braking system is adequately sized for the vehicle’s weight, but stopping distances are longer than those of lighter vehicles. The all-wheel-drive system provides enhanced traction in slippery conditions, making it suitable for year-round use.
Market Reception & Comparison
The 6.0L AWD Suburban was generally well-received by critics and consumers alike. It was praised for its spacious interior, powerful engine, and impressive towing capacity. However, its fuel economy was a common criticism, especially given rising gas prices during its production run. Compared to the 5.3L V8 Suburban, the 6.0L offered a significant performance advantage, but at a higher price point. The 6.0L was also more expensive to maintain due to its larger displacement and increased fuel consumption. The Suburban competed primarily with the Ford Expedition and GMC Yukon XL, offering a similar blend of size, power, and features.
Legacy
The GMT900 Suburban 6.0L AWD has proven to be a relatively reliable vehicle, with many examples still on the road today. The Vortec 6000 engine is known for its durability, and the four-speed automatic transmission is generally dependable. Common maintenance issues include oil leaks, sensor failures, and wear and tear on suspension components. In the used car market, these Suburbans hold their value reasonably well, particularly those in good condition with low mileage. They remain a popular choice for buyers seeking a large, capable SUV for family transportation, towing, or off-road adventures. The GMT900 generation laid the groundwork for subsequent Suburban models, continuing Chevrolet’s legacy of building large, versatile SUVs.
