The Chevrolet Tahoe (GMTK2UC/G) with the 6.2-liter V8 engine and automatic transmission represents a significant iteration of Chevrolet’s full-size SUV, produced from 2017 to 2020. This variant occupied the premium end of the Tahoe lineup, offering substantial power and capability for those needing a large, versatile vehicle. It falls within the fifth generation of the Tahoe, built on the GMTK2UC/G platform, which brought improvements in ride quality, interior refinement, and technology compared to its predecessors. The 6.2L AWD automatic was positioned above the 5.3L V8 models, catering to buyers prioritizing towing capacity and overall performance.
Technical Specifications
| Brand | Chevrolet |
| Model | Tahoe |
| Generation | Tahoe (GMTK2UC/G) |
| Type (Engine) | 6.2 V8 (420 Hp) AWD Automatic |
| Start of production | 2017 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 7 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel consumption (economy) – extra urban | 10.6 l/100 km (22.2 US mpg, 26.6 UK mpg, 9.4 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.1 kg/Hp, 164.4 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 243.1 Nm/tonne |
| Power | 420 Hp @ 5600 rpm |
| Power per litre | 68.2 Hp/l |
| Torque | 621 Nm @ 4100 rpm (458.03 lb.-ft. @ 4100 rpm) |
| Maximum engine speed | 6000 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 |
| 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 | 2554 kg (5630.61 lbs.) |
| Trunk (boot) space – minimum | 433 l (15.29 cu. ft.) |
| Trunk (boot) space – maximum | 2681 l (94.68 cu. ft.) |
| Fuel tank capacity | 98 l (25.89 US gal | 21.56 UK gal) |
| Permitted trailer load with brakes (12%) | 3674 kg (8099.78 lbs.) |
| Length | 5179 mm (203.9 in.) |
| Width | 2045 mm (80.51 in.) |
| Height | 1890 mm (74.41 in.) |
| Wheelbase | 2946 mm (115.98 in.) |
| Front track | 1745 mm (68.7 in.) |
| Rear (Back) track | 1744 mm (68.66 in.) |
| Minimum turning circle (turning diameter) | 11.9 m (39.04 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 10 gears, automatic transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 265/65 R18; 275/55 R20; 285/45 R22 |
| Wheel rims size | 8.5J x 18; 9.0J x 20; 9.5J x 22 |
Powertrain & Engine Architecture
The heart of this Tahoe variant is the 6.2-liter L86 V8 engine. This engine is a member of GM’s Small Block family, utilizing direct injection and active fuel management (cylinder deactivation) to balance performance and fuel economy. The direct injection system delivers fuel directly into the combustion chamber, improving efficiency and power output. The L86 produces 420 horsepower at 5600 rpm and 458 lb-ft of torque at 4100 rpm. This power is delivered through a smooth-shifting 10-speed automatic transmission (10L80), a significant upgrade from the 8-speed transmissions found in earlier models. The 10-speed allows for closer gear ratios, optimizing engine performance for both acceleration and highway cruising. The engine is longitudinally mounted, driving all four wheels via an advanced all-wheel-drive system.
Driving Characteristics
The 6.2L Tahoe offers a noticeably more robust driving experience compared to the 5.3L variants. Acceleration is brisk, and the engine provides ample power for merging onto highways and passing maneuvers. The 10-speed transmission contributes to this, keeping the engine in its optimal power band. While not a sports car, the Tahoe feels surprisingly agile for its size. The all-wheel-drive system provides enhanced traction in various weather conditions. Towing is where this engine truly shines, offering a substantial towing capacity. The gear ratios are well-suited for hauling heavy loads, and the engine doesn’t feel strained even under significant stress. Compared to manual transmission options (not commonly available on this generation Tahoe), the automatic provides a more relaxed and convenient driving experience, particularly in city traffic.
Equipment & Trim Levels
The 6.2L engine was typically offered on higher trim levels such as the LTZ and Premier. Standard features included leather upholstery, heated and ventilated front seats, a premium sound system, and a comprehensive suite of safety technologies like lane departure warning and forward collision alert. The Premier trim added even more luxury features, such as a rear-seat entertainment system and adaptive cruise control. Optional extras included power-adjustable running boards, a panoramic sunroof, and various appearance packages. Interior color options typically included Jet Black, and various shades of brown and gray.
Chassis & Braking
The GMTK2UC/G Tahoe utilizes an independent front suspension with coil springs and an anti-roll bar, providing a comfortable ride. The rear suspension is an independent multi-link setup, further enhancing ride quality and handling. All-wheel-drive models feature an automatic locking rear differential for improved traction. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The ABS system is standard, ensuring stable braking in emergency situations. The chassis is robustly built to handle the vehicle’s weight and towing capacity. Stabilizer bar thickness is substantial, contributing to reduced body roll during cornering.
Market Reception & Comparison
Critics generally praised the 6.2L Tahoe for its powerful engine, refined interior, and improved ride quality. The 10-speed transmission was also well-received for its smooth operation and efficiency. Fuel economy, however, remained a concern, as expected for a vehicle of this size and capability. Compared to the 5.3L V8 models, the 6.2L offered a significant performance upgrade, but at a higher price point. The 6.2L was also more expensive to maintain due to the increased complexity of the engine and its associated components. Compared to competitors like the Ford Expedition and the Nissan Armada, the Tahoe offered a compelling combination of space, power, and features.
Legacy
The 6.2L L86 engine has proven to be a relatively reliable powertrain, although preventative maintenance is crucial. Common issues include oil consumption and occasional sensor failures. The 10-speed transmission has also demonstrated good durability, but fluid changes are essential to ensure long-term reliability. On the used car market, the 6.2L Tahoe commands a premium price due to its desirable performance characteristics and towing capacity. These models are often sought after by buyers who need a capable and versatile SUV for work or recreation. The GMTK2UC/G generation Tahoe, particularly with the 6.2L engine, represents a high point in Chevrolet’s full-size SUV offerings, balancing capability, comfort, and technology.
