The Chevrolet Suburban (GMT900) 6.0L V8 with an automatic transmission, produced from 2008 to 2012, represents a significant iteration of Chevrolet’s long-running full-size SUV. This variant occupied a prominent position within the GMT900 generation, offering a balance of substantial power, towing capacity, and passenger space. It was aimed at buyers needing a large vehicle for family transport, work, or recreational activities involving substantial loads. The GMT900 platform marked a shift towards improved refinement and capability compared to its predecessors, and the 6.0L V8 automatic configuration was a popular choice for those prioritizing performance and convenience.
Technical Specifications
| Brand | Chevrolet |
| Model | Suburban |
| Generation | Suburban (GMT900) |
| Type (Engine) | 6.0L i V8 (352 Hp) Automatic |
| Start of production | 2008 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 9 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8 kg/Hp, 125.6 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 184.8 Nm/tonne |
| Power | 352 Hp @ 5400 rpm |
| Power per litre | 59 Hp/l |
| Torque | 518 Nm @ 4300 rpm (382.06 lb.-ft. @ 4300 rpm) |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine displacement | 5965 cm3 (364.01 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 | 9.6:1 |
| 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 | 16.5 l (17.44 US qt | 14.52 UK qt) |
| Kerb Weight | 2803 kg (6179.56 lbs.) |
| Max. weight | 3901 kg (8600.23 lbs.) |
| Max load | 1098 kg (2420.68 lbs.) |
| Trunk (boot) space – minimum | 1297 l (45.8 cu. ft.) |
| Trunk (boot) space – maximum | 3890 l (137.37 cu. ft.) |
| Fuel tank capacity | 148 l (39.1 US gal | 32.56 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.) |
| Ride height (ground clearance) | 227 mm (8.94 in.) |
| Drag coefficient (Cd) | 0.45 |
| Minimum turning circle (turning diameter) | 13.8 m (45.28 ft.) |
| Approach angle | 16.91° |
| Departure angle | 20.45° |
| 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 | 6 gears, automatic transmission |
Powertrain & Engine Architecture
The heart of this Suburban variant is the 6.0-liter (364 cubic inch) Vortec V8 engine. This engine, designated as the LY6, is a member of Chevrolet’s small-block V8 family, known for its durability and relatively simple design. It features a cast iron block with aluminum cylinder heads, and utilizes a multi-port fuel injection system. The engine’s 352 horsepower and 382 lb-ft of torque are generated through a combination of its displacement, a 9.6:1 compression ratio, and a relatively aggressive camshaft profile. The automatic transmission paired with this engine is a 6-speed 6L80E. This transmission is known for its smooth shifting and ability to handle the engine’s substantial torque output. The 6L80E features electronically controlled shifting and overdrive, contributing to both performance and fuel efficiency.
Driving Characteristics
The 6.0L V8 automatic Suburban delivers a driving experience focused on effortless power and towing capability. Acceleration is brisk, especially considering the vehicle’s substantial weight. While not a sports car, the engine provides ample power for merging onto highways and passing other vehicles. The 6-speed automatic transmission helps to keep the engine in its optimal power band, providing responsive shifts. Compared to the 5.3L V8 offered in lower trims, the 6.0L provides a noticeable increase in both horsepower and torque, resulting in improved towing capacity and overall performance. However, it doesn’t offer the same level of fuel economy. Compared to a manual transmission equipped Suburban, the automatic offers convenience and ease of use, but may sacrifice some driver control and fuel efficiency.
Equipment & Trim Levels
The 6.0L V8 Suburban typically came in higher trim levels, such as the LT and LTZ. Standard features included tri-zone automatic climate control, power windows and locks, a premium audio system, and leather upholstery. LTZ models added features like heated front seats, a power liftgate, and a navigation system. Optional extras included a rear-seat entertainment system, sunroof, and upgraded wheels. The interior design was focused on practicality and comfort, with ample space for passengers and cargo. The third-row seat could be folded flat to maximize cargo space.
Chassis & Braking
The GMT900 Suburban utilizes a body-on-frame construction, providing a robust and durable platform. The front suspension is an independent, short-long arm design with coil springs and a stabilizer bar. The rear suspension is a solid axle with multi-leaf springs. This setup is designed to handle heavy loads and provide a comfortable ride. Braking duties are handled by four-wheel disc brakes with ABS. The braking system is adequately sized for the vehicle’s weight and provides confident stopping power. The rear axle ratio varied depending on the specific configuration, with lower ratios (e.g., 3.42:1) prioritizing fuel economy and higher ratios (e.g., 4.10:1) prioritizing towing capacity.
Market Reception & Comparison
The 6.0L V8 Suburban was generally well-received by critics and consumers alike. It was praised for its powerful engine, spacious interior, and impressive towing capacity. However, its fuel economy was a common criticism, as expected for a vehicle of this size and weight. Compared to other full-size SUVs like the Ford Expedition and Toyota Sequoia, the Suburban offered a compelling combination of features and value. The 6.0L engine provided a performance advantage over some competitors, while the Suburban’s spacious interior and comfortable ride were also highly regarded. Reliability was generally good, although some owners reported issues with the electronic stability control system and the air conditioning compressor.
Legacy
The Chevrolet Suburban (GMT900) 6.0L V8 automatic remains a popular choice in the used car market today. The LY6 engine is known for its durability and relatively low maintenance costs. While fuel economy is not its strong suit, the Suburban’s spacious interior, powerful engine, and impressive towing capacity continue to appeal to buyers needing a large and capable SUV. Properly maintained examples can provide many years of reliable service, making it a practical and versatile vehicle for families and those with demanding hauling needs. The GMT900 generation Suburban solidified the model’s reputation as a workhorse SUV, and the 6.0L V8 variant represents a sweet spot in the lineup for those prioritizing performance and capability.
