The Chevrolet Suburban (GMT900) with the 6.0-liter V8 engine, producing 359 horsepower, represents a significant iteration in the long history of Chevrolet’s full-size SUV. Produced from 2007 through 2009, this variant occupied a prominent position within the fourth generation Suburban (GMT900 platform), offering a blend of substantial towing capacity, passenger space, and V8 power. It was positioned as a step up from the base engine options, catering to buyers needing serious capability without opting for the diesel variants. This model year marked a transition period for the Suburban, incorporating updated styling and features while retaining the core characteristics that defined the nameplate for decades.
Technical Specifications
| Brand | Chevrolet |
| Model | Suburban |
| Generation | Suburban (GMT900) |
| Type (Engine) | 6.0 i V8 16V (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 | 7.3 kg/Hp, 136.5 Hp/tonne |
| Weight-to-torque ratio | 5.3 kg/Nm, 188.2 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 | 2630 kg, 5798.16 lbs |
| Max. weight | 3266 kg, 7200.3 lbs |
| Max load | 636 kg, 1402.14 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. |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| 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 | 265/65R18 |
Powertrain & Engine Architecture
The heart of this Suburban variant is the 6.0-liter (5967 cc) Vortec V8 engine. Designated with various codes depending on specific calibration (often LY6), this engine is a member of the Vortec family known for its robust construction and relatively simple design. It features a cast iron block with aluminum cylinder heads, utilizing a 9.4:1 compression ratio and two valves per cylinder. Fuel delivery is managed by a multi-port fuel injection system, providing adequate atomization for efficient combustion. The engine’s valvetrain employs a single camshaft controlling the intake and exhaust valves. Paired with this engine is a 4-speed automatic transmission (likely the 4L60E), chosen for its durability and suitability for towing. This transmission features electronic control for smoother shifts and optimized performance. The 4L60E, while reliable, is known to have limitations in handling extremely high torque outputs, but it proved adequate for the Suburban’s intended use.
Driving Characteristics
The 359 horsepower and 495 lb-ft of torque delivered by the 6.0L V8, coupled with the 4-speed automatic, provided a noticeable step up in performance compared to the smaller engine options available on the GMT900 Suburban. Acceleration, while not sporty, was brisk enough to confidently merge onto highways and maintain speed while fully loaded. The automatic transmission’s gear ratios were tuned for towing and everyday driving, prioritizing usability over outright speed. Compared to the manual transmission versions (which were rare), the automatic offered a more relaxed driving experience, particularly in city traffic. However, the manual transmission did provide slightly better fuel economy and a more direct connection to the engine. The 6.0L also felt significantly more capable than the 5.3L V8, offering a more effortless experience when hauling heavy loads or navigating inclines.
Equipment & Trim Levels
The 6.0L V8 was typically offered on higher trim levels of the Suburban, such as the LT and LTZ. Standard features included air conditioning, power windows and locks, a CD player, and cloth upholstery. LT models added features like alloy wheels, upgraded interior trim, and a remote keyless entry system. LTZ models represented the pinnacle of Suburban luxury, offering leather upholstery, heated seats, a premium sound system, and additional chrome exterior accents. Optional extras included a navigation system, rear-seat entertainment system, and a sunroof. The specific equipment levels varied depending on regional packages and individual customer choices.
Chassis & Braking
The GMT900 Suburban utilized a body-on-frame construction, providing a robust platform for heavy-duty use. The front suspension featured an independent McPherson strut design with coil springs and an anti-roll bar, while the rear suspension employed a solid axle with coil springs. This setup prioritized ride comfort and load-carrying capacity over sporty handling. Braking duties were handled by disc brakes on all four wheels, supplemented by an Anti-lock Braking System (ABS) for improved stopping power and control. The braking system was adequately sized for the Suburban’s weight, but stopping distances were considerable, especially when heavily loaded.
Market Reception & Comparison
The 6.0L V8 Suburban received generally positive reviews, particularly from buyers who needed a vehicle capable of towing large trailers or carrying substantial cargo. Critics praised the engine’s power and torque, as well as the Suburban’s spacious interior and comfortable ride. However, fuel economy was a common concern, as the large V8 engine consumed a significant amount of gasoline. Compared to the 5.3L V8, the 6.0L offered a noticeable performance advantage, but at the cost of increased fuel consumption. The diesel-powered Suburbans offered even greater towing capacity and better fuel economy, but they came with a higher price tag and potentially higher maintenance costs.
Legacy
The GMT900 Suburban with the 6.0L V8 has proven to be a relatively reliable vehicle, particularly when properly maintained. The Vortec V8 engine is known for its durability, and the 4L60E transmission, while not without its weaknesses, can withstand years of use with regular fluid changes. Today, these Suburbans are readily available on the used car market at affordable prices. They remain popular choices for buyers who need a large, capable SUV for towing, hauling, or family transportation. However, potential buyers should be aware of the vehicle’s age and mileage, and should carefully inspect the engine, transmission, and chassis for any signs of wear or damage. The 6.0L Suburban represents a sweet spot in the model’s history, offering a compelling combination of power, space, and affordability.
