The GMC Yukon XL Denali 6.2 EcoTec3 V8 Automatic, produced from 2014 to 2019, represents the fourth generation (Yukon XL IV) of GMC’s full-size SUV. Positioned as the top-tier trim level of the extended-length Yukon XL, the Denali variant offered a significant step up in luxury and performance compared to the standard Yukon and SLE/SLT trims. This particular configuration, pairing the 6.2-liter EcoTec3 V8 engine with a ten-speed automatic transmission, was aimed at buyers seeking a spacious, powerful, and well-equipped SUV for towing, family transport, and comfortable long-distance travel. It competed directly with luxury SUVs like the Cadillac Escalade, Lincoln Navigator, and premium trims of the Chevrolet Suburban and Tahoe.
Technical Specifications
| Brand | GMC |
| Model | Yukon XL |
| Generation | Yukon XL IV |
| Type (Engine) | Denali 6.2 EcoTec3 V8 (420 Hp) 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) | 15.7 l/100 km (15 US mpg, 18 UK mpg, 6.4 km/l) |
| Fuel consumption (extra urban) | 11.2 l/100 km (21 US mpg, 25.2 UK mpg, 8.9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.1 kg/Hp, 163.7 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 242.9 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) |
| 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 | 2565 kg (5654.86 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%) | 3674 kg (8099.78 lbs.) |
| Length | 5700 mm (224.41 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 of the vehicle. |
| Drive wheel | Rear wheel drive |
| 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 VVT system optimizes valve timing based on engine speed and load, further improving performance and fuel economy. The L86 produces 420 horsepower at 5600 rpm and 459.5 lb-ft of torque at 4100 rpm. This power is then channeled through a sophisticated ten-speed automatic transmission (HydraMatic 10L80), which provides a wide range of gear ratios for optimized acceleration, towing capability, and highway cruising. The transmission’s numerous gears allow the engine to operate in its most efficient range more often.
Driving Characteristics
The combination of the 6.2-liter V8 and the ten-speed automatic transmission delivers strong acceleration and effortless cruising. While not as fuel-efficient as the smaller 5.3-liter V8 or the diesel options, the 6.2L provides a noticeable performance advantage. The ten-speed transmission is well-tuned, offering smooth and responsive shifts. Compared to earlier Yukon XL models with four- or six-speed automatics, the 10L80 significantly improves both acceleration and fuel economy. The Yukon XL Denali 6.2 feels considerably more powerful than trims equipped with the 5.3L V8, making it a more confident choice for towing heavy loads or navigating challenging terrain. The rear-wheel-drive configuration provides a traditional SUV feel, while available four-wheel drive enhances traction in inclement weather.
Equipment & Trim Levels
The Denali trim level was the most luxurious offering in the Yukon XL 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 liftgate. The Denali also featured unique exterior styling cues, such as a distinctive grille, chrome accents, and specific wheel designs. Optional extras included adaptive cruise control, lane departure warning, blind-spot monitoring, and a head-up display. Interior color schemes were typically more refined than lower trims, with options for unique wood and metal trim accents.
Chassis & Braking
The Yukon XL Denali 6.2 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. The Denali trim often included upgraded shock absorbers and stabilizer bars for improved handling and ride comfort. Braking duties are handled by ventilated discs at all four corners, with larger rotors typically fitted to the Denali compared to lower trims. Anti-lock brakes (ABS) are standard, along with electronic stability control and traction control systems.
Market Reception & Comparison
The Yukon XL Denali 6.2 was generally well-received by automotive critics and consumers alike. It was praised for its spacious interior, powerful engine, comfortable ride, and luxurious features. However, its fuel economy was often cited as a drawback, especially compared to smaller SUVs or those with diesel engines. Compared to the 5.3L V8 Yukon XL, the Denali 6.2 offered a significant performance boost but came at a higher price point. The diesel Yukon XL provided better fuel economy and comparable towing capacity, but the 6.2L V8 was favored by those prioritizing smooth, effortless power.
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 or the transmission’s electronic controls, these are generally not widespread. On the used car market, the 2014-2019 Yukon XL Denali 6.2 commands a premium price due to its combination of luxury, performance, and capability. Its spacious interior and strong towing capacity continue to make it a popular choice for families and those needing a versatile full-size SUV.
