The GMC Yukon XL Denali 6.2 EcoTec3 V8 4WD Automatic, produced from 2014 to 2019, represents the fourth generation (2015–2020) of the extended-length Yukon XL. Positioned as the flagship trim of the Yukon line, the Denali offered a significant step up in luxury and performance compared to the standard Yukon and SLE/SLT models. This variant, equipped with the 6.2-liter EcoTec3 V8 and a ten-speed automatic transmission, catered to buyers seeking a spacious, powerful, and well-appointed full-size SUV with genuine four-wheel-drive capability. The Yukon XL, in general, served as GMC’s answer to the Chevrolet Suburban and Cadillac Escalade ESV, offering increased cargo capacity behind the third row compared to the standard Yukon.
Technical Specifications
| Brand | GMC |
| Model | Yukon XL |
| Generation | Yukon XL 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 (urban) | 16.8 l/100 km (14 US mpg, 16.8 UK mpg, 6 km/l) |
| Fuel consumption (extra urban) | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.4 kg/Hp, 155.2 Hp/tonne |
| Weight-to-torque ratio | 4.4 kg/Nm, 229.5 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 | 2706 kg (5965.71 lbs.) |
| Trunk (boot) space – minimum | 1113 l (39.31 cu. ft.) |
| Trunk (boot) space – maximum | 3446 l (121.69 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 | 5697 mm (224.29 in.) |
| Width | 2045 mm (80.51 in.) |
| Height | 1890 mm (74.41 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.) |
| Approach angle | 15.3° |
| Departure angle | 20.9° |
| 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
At the heart of the Yukon XL Denali 6.2 is the L86 6.2-liter naturally aspirated V8 engine. This engine is a member of GM’s EcoTec3 family, characterized by direct injection, variable valve timing (VVT), and cylinder deactivation (Active Fuel Management) to improve fuel economy. The direct injection system delivers fuel directly into the combustion chamber, enhancing efficiency and power output. The L86 produces 420 horsepower at 5600 rpm and 458 lb-ft of torque at 4100 rpm. The engine’s robust construction and relatively simple design (compared to turbocharged alternatives) contribute to its reputation for reliability. Paired with the L86 is the Hydra-Matic 10L80 ten-speed automatic transmission. This transmission offers a wide gear ratio spread, allowing for both strong acceleration and efficient highway cruising. The ten speeds enable the engine to operate within its optimal power band more frequently, improving both performance and fuel economy.
Driving Characteristics
The combination of the 6.2-liter V8 and the ten-speed automatic delivers a confident and capable driving experience. While not as quick as some of the lighter, more performance-oriented SUVs, the Yukon XL Denali provides ample power for towing, hauling, and everyday driving. The ten-speed transmission shifts smoothly and responsively, and the wide gear ratios help to keep the engine in its sweet spot. Compared to the 5.3-liter V8 offered in lower trims, the 6.2-liter engine provides a noticeable increase in power and torque, making it a better choice for those who frequently tow or carry heavy loads. The 4WD system provides excellent traction in a variety of conditions, and the Yukon XL Denali feels stable and secure on the road. The ride quality is generally comfortable, thanks to the independent front and rear suspension.
Equipment & Trim Levels
The Denali trim level represents the pinnacle of luxury for the Yukon XL. Standard features included leather upholstery, heated and ventilated front seats, a premium sound system, a rear-seat entertainment system, a power liftgate, and a host of advanced safety features. The interior was typically finished with unique Denali badging and trim, setting it apart from other Yukon XL models. Optional extras included adaptive cruise control, lane departure warning, blind-spot monitoring, and a panoramic sunroof. The Denali also featured a more sophisticated suspension setup compared to lower trims, further enhancing ride comfort.
Chassis & Braking
The Yukon XL Denali utilizes a body-on-frame construction, providing a robust and durable platform. The suspension consists of an independent coil spring setup at the front and an independent multi-link suspension at the rear. Brakes are ventilated discs at all four corners, with larger rotors at the rear (345mm) compared to some other Yukon XL trims. The Denali also benefits from a standard automatic locking rear differential, enhancing traction in off-road conditions. The steering is rack-and-pinion with electric power assist, providing a responsive and precise feel.
Market Reception & Comparison
The Yukon XL Denali 6.2 was generally well-received by critics and consumers alike. It was praised for its spacious interior, powerful engine, comfortable ride, and luxurious features. However, fuel economy was a common criticism, as the large V8 engine and substantial weight of the vehicle resulted in relatively low MPG figures. Compared to the 5.3-liter V8 Yukon XL, the Denali offered a significant performance upgrade but came at a higher price. The Denali also competed with other luxury full-size SUVs, such as the Cadillac Escalade and Lincoln Navigator.
Legacy
The L86 6.2-liter EcoTec3 V8 paired with the 10L80 transmission has proven to be a relatively reliable powertrain. While some owners have reported minor issues with the Active Fuel Management system, the engine is generally considered to be durable and long-lasting. On the used car market, the Yukon XL Denali 6.2 commands a premium price compared to lower trims, reflecting its higher level of luxury and performance. These models remain popular choices for buyers seeking a spacious, capable, and well-equipped full-size SUV.
