The GMC Yukon XL III, produced between 2007 and 2009, represents the third generation of the full-size Yukon XL SUV. Built on the GMT900 platform, this iteration of the Yukon XL aimed to provide substantial interior space and towing capacity, catering to families and those requiring a versatile vehicle for both daily driving and recreational activities. The 6.0-liter VVT V8 4WD Automatic variant occupied a prominent position in the lineup, offering a balance of power, capability, and relative luxury within the Yukon XL range. It served as a step up from the base engine options, appealing to buyers who needed more robust performance for hauling and towing.
Technical Specifications
| Brand | GMC |
| Model | Yukon XL |
| Generation | Yukon XL III (GMT900) |
| Type (Engine) | 6.0 VVT V8 16V (366 Hp) 4WD Automatic |
| Start of production | 2007 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 9 |
| Doors | 5 |
| Fuel consumption (urban) | 19.6 l/100 km (12 US mpg, 14.4 UK mpg, 5.1 km/l) |
| Fuel consumption (extra urban) | 13.8 l/100 km (17 US mpg, 20.5 UK mpg, 7.2 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Power | 366 Hp @ 5500 rpm |
| Power per litre | 61.3 Hp/l |
| Torque | 510 Nm @ 4400 rpm (376.16 lb.-ft. @ 4400 rpm) |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | L76 |
| Engine displacement | 5967 cm3 (364.13 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 101.6 mm (4 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 9.6:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV, VVT |
| Engine oil capacity | 5.7 l (6.02 US qt, 5.02 UK qt) |
| Coolant | 16.5 l (17.44 US qt, 14.52 UK qt) |
| Max. weight | 3966 kg (8743.53 lbs.) |
| Trunk (boot) space – minimum | 1297 l (45.8 cu. ft.) |
| Trunk (boot) space – maximum | 3891 l (137.41 cu. ft.) |
| Fuel tank capacity | 119 l (31.44 US gal, 26.18 UK gal) |
| Length | 5648 mm (222.36 in.) |
| Width | 2010 mm (79.13 in.) |
| Height | 1962 mm (77.24 in.) |
| Wheelbase | 3302 mm (130 in.) |
| Front track | 1732 mm (68.19 in.) |
| Rear (Back) track | 1702 mm (67.01 in.) |
| Ride height (ground clearance) | 235 mm (9.25 in.) |
| Minimum turning circle (turning diameter) | 13.8 m (45.28 ft.) |
| Approach angle | 16.91° |
| Departure angle | 20.93° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, automatic transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link suspension, Coil spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 265/70 R17; 265/65 R18 |
| Wheel rims size | 7.5J x 17; 18 |
Powertrain & Engine Architecture
The heart of this Yukon XL variant is the 6.0-liter L76 V8 engine. This engine is a member of GM’s Vortec family, known for its robust construction and relatively simple design. The L76 features a cast iron block and aluminum cylinder heads. The “VVT” designation indicates the presence of Variable Valve Timing, which optimizes valve timing for improved fuel efficiency and power delivery across the engine’s operating range. Fuel delivery is managed by a multi-port fuel injection system, providing precise fuel metering. The engine utilizes an overhead valve (OHV) valvetrain, a design choice that contributes to its durability and ease of maintenance. The 4L80-E four-speed automatic transmission is paired with the L76. This transmission is a heavy-duty unit designed to handle the substantial torque output of the V8 and the weight of the full-size SUV. It features electronic control for smooth and precise shifting.
Driving Characteristics
The 6.0-liter V8, producing 366 horsepower and 376 lb-ft of torque, provided ample power for the Yukon XL. Acceleration was brisk for a vehicle of its size, and the automatic transmission offered smooth, if not particularly sporty, shifts. Compared to the base 5.3-liter V8, the 6.0-liter offered a noticeable improvement in both acceleration and towing capacity. While not as fuel-efficient as the smaller engine, the 6.0-liter provided a more confident driving experience, especially when fully loaded or towing a trailer. The 4L80-E transmission’s gear ratios were optimized for towing and hauling, prioritizing low-end torque over outright speed. Compared to manual transmission equipped Yukon XLs (which were rare), the automatic offered greater convenience for everyday driving, but sacrificed some driver control and fuel economy.
Equipment & Trim Levels
The 6.0-liter V8 was typically offered on higher trim levels of the Yukon XL, such as the SLT and Denali. Standard features included leather upholstery, tri-zone climate control, a premium sound system, and power-adjustable front seats. Optional extras included a navigation system, rear-seat entertainment system, and sunroof. The SLT trim offered a good balance of features and value, while the Denali trim represented the pinnacle of Yukon XL luxury, with exclusive exterior and interior styling cues. The interior generally featured woodgrain accents and a comfortable, spacious cabin designed to accommodate up to nine passengers.
Chassis & Braking
The Yukon XL III utilized a body-on-frame construction, providing a robust and durable platform. The front suspension featured an independent McPherson strut design with coil springs and an anti-roll bar, while the rear suspension employed an independent multi-link setup, also with coil springs. This suspension configuration aimed to provide a comfortable ride while maintaining good handling characteristics. Brakes were power-assisted discs on all four wheels, providing adequate stopping power for the vehicle’s weight. An Anti-lock Braking System (ABS) was standard, enhancing safety during emergency braking situations. The Yukon XL’s substantial weight necessitated a robust braking system to ensure reliable performance.
Market Reception & Comparison
The 6.0-liter Yukon XL was generally well-received by critics and consumers alike. It was praised for its spacious interior, powerful engine, and impressive towing capacity. However, fuel economy was a common criticism, as expected for a vehicle of this size and weight. Compared to competitors like the Chevrolet Suburban and Ford Expedition, the Yukon XL offered a similar level of capability and features. The Yukon XL often positioned itself as a slightly more upscale alternative, particularly in Denali trim. The 6.0-liter engine offered a noticeable performance advantage over the base 5.3-liter V8, but came at a higher price point and with slightly lower fuel economy.
Legacy
The GMT900 Yukon XL, particularly the 6.0-liter V8 variant, has proven to be a relatively reliable vehicle in the used car market. The L76 engine is known for its durability, and the 4L80-E transmission is a robust unit. However, like all vehicles of this age, regular maintenance is crucial to prevent issues. Common concerns include oil leaks, sensor failures, and wear and tear on suspension components. Today, these Yukon XLs are often sought after by those needing a large, capable SUV for towing, hauling, or family transportation. Their spacious interiors and relatively affordable price points make them a practical choice for those who prioritize utility and value.
