The Chevrolet Suburban, in its GMTT1XX generation and subsequent 2024 facelift, represents the latest iteration of a vehicle synonymous with American automotive history. Introduced in October 2024, the 6.2-liter V8 engine paired with the Hydra-Matic 10-speed automatic transmission is a prominent configuration within the Suburban lineup, positioned as a high-performance offering geared towards those requiring substantial towing capacity and robust power. This variant continues the Suburban’s legacy as a full-size SUV, catering to families and individuals needing ample space and capability. It builds upon the foundation of the GMTT1XX platform, known for its body-on-frame construction and focus on interior volume.
Technical Specifications
| Brand | Chevrolet |
| Model | Suburban |
| Generation | Suburban (GMTT1XX, facelift 2024) |
| Type (Engine) | 6.2 V8 (420 Hp) Hydra-Matic |
| Start of production | October, 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 7-9 |
| Doors | 5 |
| Fuel consumption (economy) – urban (EPA) | 15.7 l/100 km (15 US mpg, 18 UK mpg, 6.4 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 12.4 l/100 km (19 US mpg, 22.8 UK mpg, 8.1 km/l) |
| Fuel consumption (economy) – combined (EPA) | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.3 kg/Hp, 158.1 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 234.5 Nm/tonne |
| Power | 420 Hp @ 5600 rpm |
| Power per litre | 68.2 Hp/l |
| Torque | 623 Nm @ 4100 rpm (459.5 lb.-ft. @ 4100 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EcoTec3 / L87 |
| Engine displacement | 6162 cm3 (376.03 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 103.25 mm (4.06 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 11.5:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV, VVT |
| Engine oil capacity | 7.6 l (8.03 US qt | 6.69 UK qt) |
| Coolant | 14.3 l (15.11 US qt | 12.58 UK qt) |
| Kerb Weight | 2657 kg (5857.68 lbs.) |
| Max. weight | 3388 kg (7469.26 lbs.) |
| Max load | 731 kg (1611.58 lbs.) |
| Fuel tank capacity | 106 l (28 US gal | 23.32 UK gal) |
| Permitted trailer load with brakes (12%) | 3629 kg (8000.58 lbs.) |
| 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 | 10 gears, automatic transmission Hydra-Matic |
| Front suspension | Independent coil spring, Transverse stabilizer, Air Suspension – Optional |
| Rear suspension | Independent multi-link spring suspension with stabilizer, Air Suspension – Optional |
| Front brakes | Ventilated discs, 343×30.4 mm |
| Rear brakes | Ventilated discs, 345×25.4 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 265/65 R18; 275/55 R20; 275/60 R20; 275/50 R22; 285/40 R24 |
| Wheel rims size | 18; 20; 22; 24 |
Powertrain & Engine Architecture
At the heart of this Suburban variant lies the 6.2-liter EcoTec3 L87 V8 engine. This naturally aspirated powerplant utilizes direct injection, a hallmark of modern gasoline engine design, to maximize fuel efficiency and power output. The engine employs an overhead valve (OHV) valvetrain with variable valve timing (VVT) to optimize performance across the rev range. The 6.2L V8 produces 420 horsepower at 5600 rpm and 623 Nm (459.5 lb-ft) of torque at 4100 rpm. This substantial torque output is particularly beneficial for towing and hauling. The engine is longitudinally mounted in the chassis, driving the rear wheels. Paired with the engine is the Hydra-Matic 10L80 ten-speed automatic transmission. This transmission is designed for smooth shifting and efficient power delivery, offering a wide range of gear ratios to optimize both acceleration and fuel economy. The 10-speed design allows the engine to remain in its optimal power band more frequently.
Driving Characteristics
The 6.2L V8 and 10-speed automatic combination delivers a markedly different driving experience compared to lower-trim Suburbans equipped with smaller engines. Acceleration is brisk, and the vehicle feels confident when passing or merging onto highways. The ten-speed transmission provides responsive shifts, and the wide gear ratio spread helps to keep the engine operating efficiently. While not a sports car, the Suburban 6.2L offers ample power for everyday driving and demanding tasks. The weight of the vehicle (2657 kg / 5857.68 lbs) is noticeable, but the engine’s torque mitigates this to a large extent. Compared to a hypothetical Suburban with a smaller engine, this variant provides significantly more effortless performance, especially when fully loaded or towing a trailer.
Equipment & Trim Levels
The 6.2L V8 Suburban typically comes standard with a higher level of equipment than lower-trim models. Standard features often include leather upholstery, heated and ventilated front seats, a premium sound system, and advanced safety technologies such as automatic emergency braking and lane departure warning. Infotainment systems are typically large touchscreen displays with Apple CarPlay and Android Auto compatibility. Optional extras can include a panoramic sunroof, rear-seat entertainment system, and adaptive cruise control. Trim levels above the base 6.2L model often add features like upgraded interior finishes, unique exterior styling cues, and more advanced driver-assistance systems.
Chassis & Braking
The GMTT1XX Suburban utilizes a body-on-frame construction, providing a robust and durable platform. The suspension system consists of an independent coil spring setup at the front and an independent multi-link spring suspension at the rear. Air suspension is often available as an option, providing adjustable ride height and improved comfort. Braking duties are handled by ventilated discs at all four corners, with sizes of 343×30.4 mm at the front and 345×25.4 mm at the rear. The anti-lock braking system (ABS) is standard. Due to the vehicle’s weight, the braking system is designed to provide confident stopping power, even under heavy loads.
Market Reception & Comparison
The 6.2L V8 Suburban has generally received positive reviews from automotive critics. The engine is praised for its power and torque, while the ten-speed transmission is lauded for its smooth operation and efficiency. Fuel economy, however, is a common criticism, as expected for a vehicle of this size and with this engine. Compared to other trims, the 6.2L variant offers superior performance but at the cost of increased fuel consumption. Reliability has been generally good, although some owners have reported minor issues with the infotainment system. The Suburban competes with other full-size SUVs such as the Ford Expedition and GMC Yukon, offering a similar blend of space, capability, and comfort.
Legacy
The EcoTec3 6.2L V8 and Hydra-Matic 10-speed automatic transmission have proven to be a reliable and durable powertrain combination. In the used car market, Suburbans equipped with this setup tend to hold their value well, due to their strong performance and towing capabilities. While fuel economy remains a concern for some buyers, the overall package of power, space, and comfort makes this variant a popular choice for those needing a large and capable SUV. The GMTT1XX generation Suburban, and specifically the 6.2L variant, represents a continuation of Chevrolet’s long-standing tradition of building robust and versatile vehicles.
