The Chevrolet Suburban (GMT900) 5.3L V8 with all-wheel drive and an automatic transmission represents a significant iteration of Chevrolet’s long-running full-size SUV. Produced from 2007 through 2009, this variant occupied a prominent position within the GMT900 generation, known for its substantial size, truck-based construction, and focus on passenger and cargo capacity. It was a key offering for families and those requiring serious towing capability. This particular configuration, pairing the 5.3-liter V8 with a four-speed automatic and AWD, aimed to balance power, efficiency, and all-weather capability within the Suburban lineup.
Technical Specifications
| Brand | Chevrolet |
| Model | Suburban |
| Generation | Suburban (GMT900) |
| Type (Engine) | 5.3L i V8 (324 Hp) AWD Automatic |
| Start of production | 2007 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 9 |
| Doors | 5 |
| Fuel consumption (urban) | 15.7 l/100 km (15 US mpg / 18 UK mpg) |
| Fuel consumption (extra urban) | 11.8 l/100 km (19.9 US mpg / 23.9 UK mpg) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.3 kg/Hp, 121.1 Hp/tonne |
| Weight-to-torque ratio | 5.8 kg/Nm, 172.3 Nm/tonne |
| Power | 324 Hp @ 5300 rpm |
| Power per litre | 60.8 Hp/l |
| Torque | 461 Nm @ 4200 rpm (340.02 lb.-ft. @ 4200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LY5 |
| 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 capacity | 17.3 l (18.28 US qt / 15.22 UK qt) |
| Kerb Weight | 2675 kg (5897.37 lbs.) |
| Max. weight | 3357 kg (7400.92 lbs.) |
| Max load | 682 kg (1503.55 lbs.) |
| Trunk (boot) space – minimum | 1297 l (45.8 cu. ft.) |
| Trunk (boot) space – maximum | 3890 l (137.37 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 | 1951 mm (76.81 in.) |
| Wheelbase | 3302 mm (130 in.) |
| Front track | 1732 mm (68.19 in.) |
| Rear track | 1702 mm (67.01 in.) |
| Ride height (ground clearance) | 227 mm (8.94 in.) |
| Drag coefficient (Cd) | 0.45 |
| Minimum turning circle | 13.1 m (42.98 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | 4 |
| Gearbox type | automatic transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Coil spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 265/70 R17 |
| Wheel rims size | 17 |
Introduction
The Chevrolet Suburban GMT900, specifically the 5.3L V8 AWD Automatic variant, was a cornerstone of Chevrolet’s full-size SUV offerings from 2007 to 2009. Built on the GMT900 platform, which also underpinned the Tahoe and Yukon, the Suburban was designed to provide maximum interior space and towing capacity. This generation represented a move towards more refined interiors and improved ride quality compared to its predecessors, while retaining the rugged body-on-frame construction that defined the Suburban’s character. The 5.3L V8 AWD Automatic trim was positioned as a mid-range option, offering a balance between performance, capability, and price, appealing to buyers who needed the space and towing capacity of a Suburban but didn’t require the higher output of the 6.2L engine.
Powertrain & Engine Architecture
At the heart of this Suburban variant lies the LY5 5.3-liter (325 cubic inch) V8 engine. This engine is a member of Chevrolet’s Small-Block V8 family, known for its durability and relatively simple design. The LY5 features a cast iron block with aluminum cylinder heads, and utilizes a multi-port fuel injection system. The engine produces 324 horsepower at 5300 rpm and 461 lb-ft of torque at 4200 rpm. The engine’s valvetrain consists of two valves per cylinder, operated by a single camshaft. The 5.3L engine is mated to a four-speed automatic transmission (likely the 4L60E), chosen for its reliability and suitability for towing. This transmission features electronic control and overdrive for improved fuel economy at highway speeds. The all-wheel-drive system is an electronically controlled, on-demand system that automatically engages the front axle when rear wheel slip is detected, providing enhanced traction in adverse conditions.
Driving Characteristics
The 5.3L V8 Automatic Suburban delivers adequate, though not exhilarating, performance. The four-speed automatic transmission, while reliable, lacks the responsiveness and efficiency of more modern transmissions with more gears. Acceleration from a standstill is reasonable, but the Suburban’s substantial weight (over 5,900 pounds) is always apparent. The engine provides ample torque for towing and hauling, making it well-suited for its intended purpose. Compared to the available 6.2L V8, the 5.3L offers less outright power, resulting in slower acceleration and a slightly lower towing capacity. However, the 5.3L generally provides better fuel economy. The automatic transmission’s gear ratios are optimized for towing and cruising, with a relatively conservative first gear and a comfortable overdrive ratio for highway driving. The AWD system provides confident traction in slippery conditions, but adds some weight and complexity to the drivetrain.
Equipment & Trim Levels
The 2007-2009 Chevrolet Suburban 5.3L V8 AWD Automatic typically came standard with features such as air conditioning, power windows and locks, a CD player, and cloth upholstery. Higher trim levels, such as the LT, added features like leather upholstery, heated seats, a premium sound system, and tri-zone climate control. Optional extras included a navigation system, rear-seat entertainment system, and power-adjustable pedals. The interior design was functional and spacious, with seating for up to nine passengers. The third-row seat could be folded flat to maximize cargo space. The dashboard layout was straightforward and easy to use, with large, clearly marked controls.
Chassis & Braking
The GMT900 Suburban utilizes a traditional body-on-frame construction, providing a robust and durable platform. The front suspension consists of an independent McPherson strut design with coil springs and an anti-roll bar. The rear suspension employs a solid axle with coil springs. This setup prioritizes ride comfort and load-carrying capacity over sporty handling. The braking system features disc brakes on all four wheels, providing adequate stopping power for the Suburban’s weight. An Anti-lock Braking System (ABS) was standard equipment. The Suburban’s large size and weight necessitate a relatively wide turning circle.
Market Reception & Comparison
The Chevrolet Suburban GMT900 5.3L V8 AWD Automatic was generally well-received by critics and consumers alike. It was praised for its spacious interior, strong towing capacity, and comfortable ride. However, its fuel economy was often criticized, as was the relatively dated four-speed automatic transmission. Compared to the 6.2L V8 Suburban, the 5.3L offered a more affordable price point and slightly better fuel economy, making it a popular choice for buyers who didn’t need the extra power. In terms of reliability, the LY5 5.3L V8 is generally considered to be a durable engine, but it is prone to oil consumption issues in some cases. The 4L60E transmission is also known to be reliable, but requires regular maintenance to prevent issues.
Legacy
The Chevrolet Suburban GMT900 5.3L V8 AWD Automatic remains a popular choice in the used car market today, particularly among those seeking a large, capable SUV for family transportation or towing. While its fuel economy is not competitive with more modern SUVs, its spacious interior, robust construction, and relatively affordable price make it an attractive option. The LY5 5.3L V8 engine is known for its longevity, and with proper maintenance, can provide many years of reliable service. However, potential buyers should be aware of the potential for oil consumption issues and the importance of regular transmission maintenance.
