The Chevrolet Suburban, in its GMTK2YC/G generation produced from 2018 to 2020, represented a significant evolution of the iconic full-size SUV. The variant equipped with the 6.2-liter EcoTec V8 engine, paired with a 10-speed automatic transmission and four-wheel drive, occupied the premium position within the Suburban lineup. This configuration was aimed at buyers needing substantial towing capacity, powerful acceleration, and a luxurious driving experience. It built upon the foundation of the K2 platform, offering increased space, improved technology, and enhanced refinement compared to previous generations.
Technical Specifications
| Brand | Chevrolet |
| Model | Suburban |
| Generation | Suburban (GMTK2YC/G) |
| Type (Engine) | 6.2 EcoTec V8 (420 Hp) 4WD Automatic |
| Start of production | 2018 year |
| End of production | 2020 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 8 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 16.8 l/100 km (14 US mpg, 16.8 UK mpg, 6 km/l) |
| Fuel consumption (economy) – extra urban | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel consumption (economy) – combined | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.8 kg/Hp, 147.4 Hp/tonne |
| Weight-to-torque ratio | 4.6 kg/Nm, 218.6 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 | L86 |
| 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.) |
| Number of valves per cylinder | 2 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | VVT |
| Engine oil capacity | 7.6 l (8.03 US qt | 6.69 UK qt) |
| Coolant | 16.8 l (17.75 US qt | 14.78 UK qt) |
| Kerb Weight | 2850 kg (6283.17 lbs.) |
| Max. weight | 3402 kg (7500.13 lbs.) |
| Max load | 552 kg (1216.95 lbs.) |
| Trunk (boot) space – minimum | 1113 l (39.31 cu. ft.) |
| Trunk (boot) space – maximum | 3429 l (121.09 cu. ft.) |
| Fuel tank capacity | 117 l (30.91 US gal | 25.74 UK gal) |
| Permitted trailer load with brakes (12%) | 3583 kg (7899.16 lbs.) |
| Length | 5699 mm (224.37 in.) |
| Width | 2044 mm (80.47 in.) |
| Height | 1889 mm (74.37 in.) |
| Wheelbase | 3302 mm (130 in.) |
| Front track | 1745 mm (68.7 in.) |
| Rear (Back) track | 1744 mm (68.66 in.) |
| Ride height (ground clearance) | 201 mm (7.91 in.) |
| Minimum turning circle (turning diameter) | 13.1 m (42.98 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 10 gears, automatic transmission Hydra-Matic |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 285/45 R22 |
| Wheel rims size | 22 |
Powertrain & Engine Architecture
The heart of this Suburban variant is the 6.2-liter L86 EcoTec3 V8 engine. This engine utilizes direct injection, cylinder deactivation, and variable valve timing (VVT) to balance power and efficiency. The direct injection system delivers fuel directly into the combustion chamber, improving combustion efficiency and reducing emissions. Cylinder deactivation allows the engine to operate on four cylinders during light-load conditions, further enhancing fuel economy. The 10-speed Hydra-Matic automatic transmission, a General Motors design, provides a wide range of gear ratios for optimized acceleration and towing performance. This transmission is known for its smooth shifts and responsiveness. The engine is longitudinally mounted, sending power to all four wheels via a sophisticated four-wheel-drive system.
Driving Characteristics
The 6.2L Suburban delivers robust acceleration, especially considering its substantial weight. The 10-speed transmission keeps the engine in its optimal power band, providing strong pull even when fully loaded or towing. Compared to the 5.3L V8 offered in lower trims, the 6.2L provides a noticeable increase in power and torque, resulting in quicker acceleration and more confident passing maneuvers. While not a sports car, the Suburban 6.2L offers a surprisingly refined driving experience, with good ride quality and relatively quiet operation. The four-wheel-drive system provides excellent traction in various conditions, making it a capable vehicle for both on-road and off-road use. The gear ratios are tuned for both towing and highway cruising, offering a balance between performance and efficiency.
Equipment & Trim Levels
The 6.2L Suburban typically came standard with a high level of equipment, often found in the Premier or High Country trims. Standard features included leather upholstery, heated and ventilated front seats, a premium sound system, a large touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, and a suite of advanced safety features such as automatic emergency braking, lane departure warning, and blind-spot monitoring. Optional extras included a rear-seat entertainment system, a panoramic sunroof, and adaptive cruise control. Interior trim options varied, with higher trims offering more luxurious materials and finishes.
Chassis & Braking
The GMTK2YC/G Suburban utilizes a body-on-frame construction, providing a robust and durable platform. The suspension consists of independent front suspension and a multi-link rear suspension. The rear brakes are ventilated discs, a step up from the drums found on some lower trims, providing improved stopping power. The chassis is designed to handle heavy loads and provide a comfortable ride. Stabilizer bars are fitted front and rear to reduce body roll during cornering. The electric power steering provides a responsive and precise steering feel.
Market Reception & Comparison
The 6.2L Suburban received positive reviews for its powerful engine, spacious interior, and refined driving experience. Critics praised its towing capacity and overall versatility. However, its fuel economy was a common criticism, as expected for a vehicle of its size and weight. Compared to the 5.3L V8 models, the 6.2L offered a significant performance advantage but came at a higher price point. The 6.2L was also often compared to other full-size SUVs, such as the Ford Expedition and the GMC Yukon, with the Suburban generally being recognized for its superior cargo space and overall refinement.
Legacy
The L86 6.2L EcoTec V8 has proven to be a relatively reliable engine, with few widespread issues reported. The 10-speed automatic transmission has also demonstrated good durability. In the used car market, the 6.2L Suburban commands a premium price due to its performance and features. These models are often sought after by buyers who need a powerful and capable SUV for towing, hauling, or family transportation. Proper maintenance, including regular oil changes and transmission fluid services, is crucial for ensuring the long-term reliability of this powertrain.
