The Chevrolet Suburban, specifically the GMTK2YC/G generation produced between 2018 and 2020 equipped with the 6.2-liter EcoTec V8 engine and a 10-speed automatic transmission, represents a significant iteration of the longest-running SUV nameplate in continuous production. This variant occupied the premium end of the Suburban lineup, offering substantial power and towing capacity for buyers needing a large, capable family vehicle. It was positioned above the 5.3L V8 models, catering to those prioritizing performance and heavier-duty tasks. The GMTK2YC/G generation marked a shift towards more refined interiors and advanced technology compared to its predecessors, while retaining the body-on-frame construction that defined the Suburban’s rugged character.
Technical Specifications
| Brand | Chevrolet |
| Model | Suburban |
| Generation | Suburban (GMTK2YC/G) |
| Type (Engine) | 6.2 EcoTec V8 (420 Hp) 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 | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel consumption (economy) – combined | 13.8 l/100 km (17 US mpg, 20.5 UK mpg, 7.2 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.4 kg/Hp, 155.6 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 230.7 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 | 2700 kg (5952.48 lbs.) |
| Max. weight | 3311 kg (7299.51 lbs.) |
| Max load | 611 kg (1347.02 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%) | 3674 kg (8099.78 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.) |
| 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 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 power output. 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 cruising. This transmission is known for its smooth shifts and responsiveness. The engine is longitudinally mounted in the chassis, driving the rear wheels. The L86 engine is a robust design, known for its durability and relatively straightforward maintenance.
Driving Characteristics
The 6.2L Suburban delivers a noticeably more powerful driving experience compared to the 5.3L variants. The 420 horsepower and 460 lb-ft of torque provide ample acceleration, even when fully loaded or towing. The 10-speed transmission keeps the engine in its optimal power band, resulting in strong pull throughout the rev range. While not a sports car, the Suburban feels surprisingly agile for its size. The rear-wheel-drive configuration contributes to a more traditional truck-like feel, and the suspension is tuned to provide a comfortable ride while maintaining stability when carrying heavy loads. Compared to manual transmission Suburbans (which were rare), the automatic offers convenience and ease of use, particularly in city driving and towing situations.
Equipment & Trim Levels
The 6.2L Suburban typically came standard with a high level of equipment. This 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. Trim levels varied, but the 6.2L engine was generally offered on the higher-end trims like Premier and High Country.
Chassis & Braking
The GMTK2YC/G Suburban utilizes a traditional body-on-frame construction, providing a robust and durable platform. The suspension consists of independent front suspension and a solid rear axle with multi-leaf springs. This setup is designed to handle heavy loads and provide a comfortable ride. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. An anti-lock braking system (ABS) is standard, enhancing safety and control during emergency braking situations. The chassis is designed to accommodate the vehicle’s substantial weight and provide a stable platform for towing.
Market Reception & Comparison
The 6.2L Suburban received generally positive reviews from automotive critics. It was praised for its powerful engine, comfortable ride, spacious interior, and advanced technology. 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 significantly more power and towing capacity, but at a higher price point. The 6.2L was also more expensive to maintain due to the increased complexity of the engine and transmission. Against competitors like the Ford Expedition and GMC Yukon, the Suburban held its own, offering a compelling combination of space, power, and features.
Legacy
The L86 6.2L EcoTec V8 paired with the 10-speed automatic has proven to be a relatively reliable powertrain. While some owners have reported minor issues with the direct injection system, the engine is generally considered durable and capable of high mileage. On the used car market, Suburbans equipped with this powertrain command a premium price due to their performance and towing capabilities. The GMTK2YC/G generation Suburban, particularly the 6.2L variant, remains a popular choice for families and individuals needing a large, capable, and comfortable SUV.
