The GMC Yukon IV Denali 6.2 EcoTec3 V8 (420 Hp) 4WD Automatic represents the pinnacle of luxury and capability within the fourth generation of the GMC Yukon, produced from January 2014 through December 2019. Positioned as the flagship trim level, the Denali distinguished itself through enhanced styling, a more opulent interior, and, crucially, the potent 6.2-liter EcoTec3 V8 engine paired exclusively with a ten-speed automatic transmission and a four-wheel-drive system. This combination aimed to deliver a refined yet powerful driving experience, catering to buyers seeking a large, comfortable SUV with substantial towing capacity and all-weather performance. The Yukon IV generation (internally designated as the GMT900 platform) saw significant improvements in ride quality, interior space, and technology compared to its predecessor.
Technical Specifications
| Brand | GMC |
| Model | Yukon |
| Generation | Yukon IV |
| Type (Engine) | Denali 6.2 EcoTec3 V8 (420 Hp) 4WD Automatic |
| Start of production | January, 2014 |
| End of production | December, 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 7 |
| 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 | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.2 kg/Hp, 161.2 Hp/tonne |
| Weight-to-torque ratio | 4.2 kg/Nm, 238.4 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.) |
| Compression ratio | 11.5:1 |
| 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 | 2605 kg (5743.04 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.) |
| Ride height (ground clearance) | 203 mm (7.99 in.) |
| Minimum turning circle (turning diameter) | 11.9 m (39.04 ft.) |
| Approach angle | 15.3° |
| Departure angle | 23.2° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 10 gears, automatic transmission HydraMatic |
| Front suspension | Independent coil spring |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs, 330 mm |
| Rear brakes | Disc, 345 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 265/65 R18 |
| Wheel rims size | 8.5J x 18 |
Powertrain & Engine Architecture
The heart of the Yukon Denali is the 6.2-liter L86 EcoTec3 V8 engine. This engine utilizes direct injection, active fuel management (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. Active Fuel Management allows the engine to operate on four cylinders during light-load conditions, such as highway cruising, to conserve fuel. The ten-speed HydraMatic automatic transmission, a significant upgrade from the six-speed unit in earlier models, provides a wider range of gear ratios for improved acceleration, towing capability, and fuel economy. The transmission’s close ratios help keep the engine in its optimal power band. The engine is longitudinally mounted, driving all four wheels through a sophisticated four-wheel-drive system that allows the driver to select between two-wheel drive, four-wheel drive automatic, and four-wheel drive locked modes.
Driving Characteristics
The 6.2-liter V8 and ten-speed automatic combination delivers strong acceleration and effortless cruising. While not a sports car, the Yukon Denali offers ample power for merging onto highways and passing other vehicles. The ten-speed transmission is generally smooth and responsive, although some drivers have noted occasional hunting for the right gear. Compared to the 5.3-liter V8 offered in lower trims, the 6.2-liter provides a noticeable increase in power and torque, resulting in improved towing capacity and a more confident driving experience. The automatic transmission, while convenient, doesn’t offer the same level of driver engagement as the available eight-speed automatic paired with the 6.2L in some later model years. The four-wheel-drive system provides excellent traction in various weather conditions.
Equipment & Trim Levels
The Denali trim was the most luxurious offering in the Yukon lineup. Standard features included leather upholstery, heated and ventilated front seats, a premium Bose audio system, a rear-seat entertainment system, tri-zone automatic climate control, and a power-adjustable steering wheel. Exterior features included unique chrome grille and trim, 20-inch alloy wheels, and power-retractable running boards. Optional extras included adaptive cruise control, lane departure warning, forward collision alert, and a sunroof. The interior was typically finished with wood trim and brushed aluminum accents, creating a sophisticated and upscale atmosphere.
Chassis & Braking
The Yukon IV rides on a fully boxed frame, providing a solid and stable platform. The suspension consists of independent coil springs in the front and an independent multi-link suspension in the rear. The Denali trim often included Magnetic Ride Control, an adaptive damping system that uses magnetically controlled dampers to adjust to road conditions in real-time, providing a smoother and more controlled ride. Brakes are ventilated discs at all four corners, with larger rotors on the front axle. Anti-lock brakes (ABS) and stability control are standard safety features.
Market Reception & Comparison
The Yukon Denali 6.2L was generally well-received by critics and consumers alike. It was praised for its powerful engine, luxurious interior, and spaciousness. Fuel economy, however, was a common criticism, as expected for a vehicle of this size and weight. Compared to competitors like the Cadillac Escalade and Lincoln Navigator, the Yukon Denali offered a compelling combination of luxury, capability, and value. The 6.2L engine provided a noticeable performance advantage over the base 5.3L V8, making it a popular choice for buyers who frequently tow or haul heavy loads.
Legacy
The L86 6.2-liter EcoTec3 V8 has proven to be a relatively reliable engine, although some owners have reported issues with oil consumption and active fuel management system components. The ten-speed HydraMatic transmission has also demonstrated good durability, but regular maintenance, including fluid changes, is crucial. On the used car market, the Yukon Denali 6.2L commands a premium price due to its desirable features and powerful engine. It remains a popular choice for buyers seeking a large, luxurious SUV with strong towing capabilities and a comfortable ride.
