The GMC Sierra 1500 III, specifically the Crew Cab Short Box configuration with the 5.3-liter Vortec V8 engine and four-speed automatic transmission, was a popular full-size pickup truck produced from 2007 to 2010. This variant represented a sweet spot in the Sierra 1500 lineup, offering a balance of capability, comfort, and affordability. It was part of the GMT900 platform generation, a significant redesign for the Sierra and its Chevrolet Silverado counterpart, focusing on improved interior space, enhanced safety features, and a more refined driving experience. This particular trim level catered to buyers needing a versatile truck for both work and family use, providing ample passenger space within the Crew Cab body style and a useful short bed for hauling.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 III (GMT900) Crew Cab Short Box |
| Type (Engine) | 5.3 Vortec V8 (315 Hp) 4WD 4 Automatic |
| Start of production | 2007 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 6 |
| Doors | 4 |
| Fuel consumption (urban) | 16.8 l/100 km (14 US mpg, 16.8 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 | 7.6 kg/Hp, 131.4 Hp/tonne |
| Weight-to-torque ratio | 5.2 kg/Nm, 191.1 Nm/tonne |
| Power | 315 Hp @ 5200 rpm |
| Power per litre | 59.1 Hp/l |
| Torque | 458 Nm @ 4400 rpm (337.8 lb.-ft. @ 4400 rpm) |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LH6, LY5 |
| Engine displacement | 5328 cm3 (325.13 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 96.01 mm (3.78 in.) |
| Piston Stroke | 91.95 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 |
| Valvetrain | OHV |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant capacity | 14.1 l (14.9 US qt | 12.41 UK qt) |
| Kerb Weight | 2397 kg (5284.48 lbs.) |
| Max. weight | 3175 kg (6999.68 lbs.) |
| Max load | 778 kg (1715.2 lbs.) |
| Trunk (boot) space – maximum | 1506 l (53.18 cu. ft.) |
| Fuel tank capacity | 98 l (25.89 US gal | 21.56 UK gal) |
| Length | 5844 mm (230.08 in.) |
| Width including mirrors | 2031 mm (79.96 in.) |
| Height | 1872 mm (73.7 in.) |
| Wheelbase | 3645 mm (143.5 in.) |
| Front track | 1730 mm (68.11 in.) |
| Rear (Back) track | 1702 mm (67.01 in.) |
| Ride height (ground clearance) | 229 mm (9.02 in.) |
| Minimum turning circle (turning diameter) | 14.4 m (47.24 ft.) |
| Approach angle | 15.3° |
| Departure angle | 22.4° |
| Ramp-over (brakeover) angle | 19.3° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 4 gears, automatic transmission Hydra-Matic |
| Front suspension | Independent coil spring |
| Rear suspension | Rigid axle suspension, Leaf spring |
| Front brakes | Disc, 330×30 mm |
| Rear brakes | Drum, 295×60 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/70 R17 |
| Wheel rims size | 7.5J x 17 |
Powertrain & Engine Architecture
At the heart of this Sierra 1500 variant lies the 5.3-liter Vortec 5300 V8 engine. This engine, designated as either LH6 or LY5 depending on specific production dates and calibrations, is a member of the Vortec family known for its robust construction and relatively simple design. It features a cast iron block with aluminum cylinder heads, utilizing a 9.9:1 compression ratio and a two-valve-per-cylinder overhead valve (OHV) valvetrain. Fuel delivery is managed by a multi-port fuel injection system, providing adequate fuel atomization for efficient combustion. The engine produces 315 horsepower at 5200 rpm and 337.8 lb-ft of torque at 4400 rpm. The four-speed Hydra-Matic automatic transmission was the standard pairing for this engine. While not the most modern transmission by today’s standards, it was known for its durability and smooth operation. The transmission’s gear ratios were optimized for towing and hauling, prioritizing low-end torque over outright acceleration.
Driving Characteristics
The 5.3L V8 with the four-speed automatic delivered a comfortable and capable driving experience. Acceleration was adequate for everyday driving, but not particularly sporty. The automatic transmission, while smooth, lacked the responsiveness of a manual gearbox. The truck felt planted and stable, thanks to its robust chassis and four-wheel-drive system. Towing capacity was a strong point, making it suitable for hauling trailers, boats, or other heavy loads. Compared to the available 4.8L V8, the 5.3L offered a noticeable power increase, while the 6.0L V8 provided even more performance but at a higher price point. The four-speed automatic, while reliable, did contribute to slightly higher fuel consumption compared to later six-speed transmissions.
Equipment & Trim Levels
The Crew Cab Short Box 5.3L 4WD typically came standard with features like air conditioning, power windows and locks, a CD player, and cloth upholstery. Higher trim levels, such as the SLT, added features like leather seats, a Bose sound system, heated front seats, and automatic climate control. Optional extras included a navigation system, sunroof, and upgraded towing packages. The interior design was functional and durable, prioritizing practicality over luxury. The Crew Cab configuration offered generous rear seat space, making it a comfortable option for families.
Chassis & Braking
The Sierra 1500 III utilized a body-on-frame construction, providing a solid and durable platform. The front suspension featured independent coil springs, while the rear suspension employed a traditional leaf spring setup. This configuration was well-suited for handling heavy loads and providing a comfortable ride. Braking duties were handled by disc brakes up front and drum brakes in the rear. An anti-lock braking system (ABS) was standard, enhancing safety during emergency braking situations. The truck’s relatively high ground clearance allowed for moderate off-road capability.
Market Reception & Comparison
The GMC Sierra 1500 III, particularly the 5.3L V8 variant, was well-received by critics and consumers alike. It was praised for its comfortable ride, spacious interior, and strong towing capacity. Fuel economy, however, was a common criticism, as the 5.3L V8 was not particularly fuel-efficient. Compared to the Chevrolet Silverado, which shared the same platform, the Sierra offered a slightly more upscale interior and a more refined driving experience. The 5.3L engine offered a good balance between power and fuel economy, making it a popular choice for buyers who needed a capable truck without the added cost of the larger 6.0L V8.
Legacy
The GMT900 generation Sierra 1500, and specifically the 5.3L V8/4-speed automatic combination, has proven to be a relatively reliable powertrain. The Vortec 5300 engine is known for its longevity, and the Hydra-Matic transmission, while aging, is generally durable with proper maintenance. Today, these trucks are readily available on the used car market at affordable prices. They remain a popular choice for those seeking a capable and dependable full-size pickup truck for work or recreational use. Common maintenance items include oil changes, transmission fluid flushes, and occasional repairs to the suspension and braking systems. Despite their age, these trucks continue to provide years of service with proper care.
