The GMC Yukon XL III, specifically the 2500 trim level equipped with the 6.0-liter VVT V8 engine and automatic transmission, was produced from 2007 to 2009 as part of the GMT900 platform generation. This variant represented a heavy-duty, full-size SUV aimed at buyers needing substantial towing capacity and interior space. Positioned above the standard 1500 series Yukon XL, the 2500 offered increased payload and a more robust powertrain designed for demanding tasks. It served as a competitor to the Ford Expedition 2500 and Chevrolet Suburban 2500, offering a blend of capability and comfort within the GMC brand.
Technical Specifications
| Brand | GMC |
| Model | Yukon XL |
| Generation | Yukon XL III (GMT900) |
| Type | 2500 6.0 VVT V8 16V (352 Hp) Automatic |
| Start of production | 2007 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 9 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.9 kg/Hp, 126 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 185.4 Nm/tonne |
| Power | 352 Hp @ 5400 rpm |
| Power per litre | 59 Hp/l |
| Torque | 518 Nm @ 4200 rpm, 382.06 lb.-ft. @ 4200 rpm |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LY6 |
| 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 | 16.9 l, 17.86 US qt | 14.87 UK qt |
| Kerb Weight | 2794 kg, 6159.72 lbs |
| Max. weight | 3901 kg, 8600.23 lbs |
| Max load | 1107 kg, 2440.52 lbs |
| Trunk (boot) space – minimum | 1298 l, 45.84 cu. ft. |
| Trunk (boot) space – maximum | 3891 l, 137.41 cu. ft. |
| Fuel tank capacity | 148 l, 39.1 US gal | 32.56 UK gal |
| Permitted trailer load with brakes (12%) | 4354 kg, 9598.93 lbs |
| Length | 5648 mm, 222.36 in |
| Width | 2010 mm, 79.13 in |
| Height | 1950 mm, 76.77 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) | 227 mm, 8.94 in |
| Minimum turning circle (turning diameter) | 13.8 m, 45.28 ft |
| Approach angle | 17.04° |
| Departure angle | 20.45° |
| 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 | 6 gears, automatic transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link suspension, Leaf 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 | 245/75 R16; 265/70 R17 |
| Wheel rims size | 6.5J x 16; 7.5J x 17 |
Powertrain & Engine Architecture
The heart of this Yukon XL 2500 variant is the LY6 6.0-liter V8 engine. This engine is a member of GM’s Vortec family, known for its robust construction and relatively simple design. The LY6 features a cast iron block and aluminum cylinder heads, incorporating Variable Valve Timing (VVT) for improved efficiency and low-end torque. Fuel delivery is managed by a multi-port fuel injection system, providing precise fuel metering for optimal combustion. The overhead valve (OHV) valvetrain, while traditional, proved reliable and cost-effective. The engine produces 352 horsepower at 5400 rpm and 518 lb-ft of torque at 4200 rpm. The engine is longitudinally mounted in the chassis.
The transmission paired with the LY6 is a 6-speed automatic, designated 6L80E. This transmission is electronically controlled, offering smooth shifting and adaptive learning capabilities. The gear ratios are tuned for towing and hauling, with a relatively deep first gear for maximizing pulling power and a higher overdrive gear for efficient highway cruising. The 6L80E is known for its durability, but like all automatic transmissions, requires regular fluid changes for optimal performance.
Driving Characteristics
The Yukon XL 2500 6.0L Automatic delivers a driving experience focused on capability rather than outright sportiness. Acceleration is adequate, but the vehicle’s substantial weight (over 6,000 pounds) limits its responsiveness. The automatic transmission shifts smoothly, but can sometimes feel hesitant when downshifting for passing maneuvers. The emphasis is on providing ample torque for towing and hauling heavy loads. The suspension, while comfortable for everyday driving, can exhibit some body roll in corners due to the vehicle’s high center of gravity. Compared to the 1500 series Yukon XL, the 2500 feels more planted and stable when towing, and the increased torque is readily apparent. Compared to diesel variants, the 6.0L V8 offers a quieter and smoother driving experience, but sacrifices fuel economy.
Equipment & Trim Levels
The 2500 trim level typically included features such as cloth upholstery, air conditioning, power windows and locks, and a basic audio system. Optional extras included leather upholstery, a premium sound system, navigation, rear-seat entertainment, and various towing packages. The Yukon XL 2500 was often equipped with heavy-duty suspension components and a limited-slip differential to enhance its towing and hauling capabilities. The interior layout prioritized space and functionality, with seating for up to nine passengers depending on the configuration.
Chassis & Braking
The Yukon XL 2500 utilizes a body-on-frame construction, providing a robust and durable platform. The front suspension features an independent McPherson strut design with coil springs and an anti-roll bar. The rear suspension employs a multi-link setup with leaf springs, designed to handle heavy loads. Braking duties are handled by disc brakes on all four wheels, assisted by an Anti-lock Braking System (ABS). The braking system is adequately sized for the vehicle’s weight, but requires a firm pedal effort. The 2500 trim often featured heavier-duty stabilizer bars compared to the 1500 series, further improving handling stability.
Market Reception & Comparison
The Yukon XL 2500 6.0L Automatic was generally well-received by critics and consumers seeking a capable and spacious SUV. It was praised for its powerful engine, ample towing capacity, and comfortable ride. However, fuel economy was a common criticism, as the 6.0-liter V8 is not particularly efficient. Compared to the diesel-powered 2500 Duramax models, the gasoline engine offered lower fuel economy but a lower initial purchase price and a quieter driving experience. Reliability was generally good, but some owners reported issues with the fuel injectors and the electronic throttle control system.
Legacy
The GMT900 Yukon XL 2500 with the 6.0L V8 and automatic transmission remains a popular choice in the used car market, particularly among those needing a capable tow vehicle. The LY6 engine is known for its durability, and with proper maintenance, can provide many years of reliable service. However, potential buyers should be aware of the potential for fuel injector issues and the importance of regular transmission fluid changes. The vehicle’s spacious interior and robust construction continue to appeal to families and those requiring a versatile and capable SUV.
