The GMC Yukon XL III, produced between 2007 and 2009, represents the third generation of the extended-length Yukon full-size SUV. Built on the GMT900 platform, this iteration of the Yukon XL aimed to provide substantial passenger and cargo space, catering to families and those requiring significant hauling capacity. The 5.3 i V8 16V (320 Hp) FlexFuel Automatic variant occupied a central position within the Yukon XL lineup, offering a balance between power, fuel efficiency (for its class), and affordability. It served as a popular choice for buyers who didn’t require the higher performance of the 6.2L engine, but still desired the capability of a full-size SUV.
Technical Specifications
| Brand | GMC |
| Model | Yukon XL |
| Generation | Yukon XL III (GMT900) |
| Type (Engine) | 5.3 i V8 16V (320 Hp) FlexFuel Automatic |
| Start of production | 2007 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 9 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 16.8 l/100 km (14 US mpg, 16.8 UK mpg) |
| Fuel consumption (economy) – urban (Ethanol – E85) | 21.4 l/100 km |
| Fuel consumption (economy) – extra urban | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg) |
| Fuel consumption (economy) – extra urban (Ethanol – E85) | 15.7 l/100 km |
| Fuel Type | Petrol / Ethanol – E85 |
| Power | 320 Hp @ 5200 rpm |
| Power per litre | 60.1 Hp/l |
| Torque | 461 Nm @ 4200 rpm (340.02 lb.-ft. @ 4200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LMG |
| Engine displacement | 5327 cm3 (325.07 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 96 mm (3.78 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 9.9:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant | 17.3 l (18.28 US qt | 15.22 UK qt) |
| 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 | 2007 mm (79.02 in.) |
| Height | 1951 mm (76.81 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) | 13.1 m (42.98 ft.) |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 4 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, 330×30 mm |
| Rear brakes | Disc, 345×20 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 255/70 R17 |
| Wheel rims size | 7.5J x 17 |
Introduction
The 2007-2009 GMC Yukon XL III, equipped with the 5.3L V8 and automatic transmission, was a mainstay of GMC’s full-size SUV offerings. Positioned as the extended-length version of the Yukon, the XL provided significantly more cargo volume behind the third row of seats compared to the standard Yukon. This model year represented a mid-cycle refresh for the GMT900 platform, incorporating updated interior materials and some minor exterior styling changes. The 5.3L engine and four-speed automatic transmission combination was a popular choice, offering a balance of capability and fuel economy within the Yukon XL range.
Powertrain & Engine Architecture
The heart of this Yukon XL variant is the 5.3-liter (325 cubic inch) LMG V8 engine. This engine is a member of GM’s Vortec family, known for its robust construction and relatively simple design. The LMG features a cast iron block with aluminum cylinder heads, utilizing a 9.9:1 compression ratio. Fuel delivery is managed by a multi-port fuel injection system, providing precise fuel metering for optimal combustion. The engine produces 320 horsepower at 5200 rpm and 461 Nm (340 lb-ft) of torque at 4200 rpm. The engine is also FlexFuel capable, meaning it can operate on gasoline or a blend of up to 85% ethanol (E85).
The engine is paired with a four-speed automatic transmission (likely the 4L60E). While not as technologically advanced as newer transmissions with more gears, the 4L60E is a durable unit capable of handling the engine’s torque output. The transmission’s gear ratios are tuned for a balance of acceleration and highway cruising, prioritizing towing capability and comfortable driving over outright performance.
Driving Characteristics
The Yukon XL with the 5.3L V8 and automatic transmission delivers a comfortable and capable driving experience. Acceleration is adequate for everyday driving and towing, but it’s not particularly sporty. The four-speed automatic transmission, while reliable, can feel somewhat dated compared to more modern transmissions. Shifting is generally smooth, but downshifts can be slow to respond. The vehicle’s substantial weight (over 5,500 lbs) is noticeable, particularly during braking and cornering. Compared to the available 6.2L V8, the 5.3L offers less raw power, resulting in slower acceleration and reduced towing capacity. However, the 5.3L provides better fuel economy, making it a more practical choice for those who don’t frequently tow heavy loads.
Equipment & Trim Levels
The Yukon XL offered a range of trim levels, with the 5.3L engine available on most. Standard features typically included air conditioning, power windows and locks, a CD player, and cloth upholstery. Higher trim levels added features such as leather upholstery, heated seats, a premium sound system, and a navigation system. The Yukon XL was also available with options like a sunroof, rear-seat entertainment system, and a towing package. The interior design was functional and spacious, prioritizing practicality over luxury.
Chassis & Braking
The Yukon XL’s chassis is a body-on-frame construction, providing a robust and durable platform. The front suspension utilizes an independent McPherson strut design with coil springs and an anti-roll bar, while the rear suspension employs an independent multi-link setup with coil springs. This suspension configuration provides a comfortable ride, but it’s not particularly sporty. Braking duties are handled by disc brakes on all four wheels, with ABS (Anti-lock Braking System) standard. The braking system is adequate for the vehicle’s weight, but it can feel somewhat lacking in stopping power when fully loaded.
Market Reception & Comparison
The Yukon XL with the 5.3L V8 was generally well-received by critics and consumers. It was praised for its spacious interior, comfortable ride, and capable towing capacity. However, some critics noted the dated four-speed automatic transmission and the vehicle’s relatively poor fuel economy. Compared to the 6.2L V8 Yukon XL, the 5.3L offered a more affordable price point and better fuel economy, making it a more appealing option for budget-conscious buyers. Compared to competitors like the Chevrolet Suburban and Ford Expedition, the Yukon XL offered a similar level of space and capability.
Legacy
The GMT900 Yukon XL, particularly the 5.3L V8 variant, has proven to be a relatively reliable vehicle. The 5.3L engine is known for its durability, and the 4L60E transmission, while not perfect, is generally dependable with proper maintenance. Today, these Yukon XLs can be found on the used car market at relatively affordable prices. Common issues include oil leaks, sensor failures, and wear and tear on suspension components. Despite its age, the Yukon XL remains a popular choice for those seeking a spacious and capable SUV, particularly for families and those who need to tow trailers or boats.
