The GMC Sierra 1500 III, produced from 2007 to 2010, represented a significant evolution in General Motors’ full-size pickup truck offerings. This generation, designated GMT900, aimed to blend robust capability with improved refinement and interior space. Within the Sierra 1500 lineup, the Crew Cab Short Box configuration with the 4.8-liter Vortec V8 engine and four-speed automatic transmission occupied a middle ground, offering a balance between affordability, capability, and passenger comfort. It served as a popular choice for buyers needing a versatile truck for both work and family duties, without the higher price tag of the larger displacement engines or more luxurious trim levels.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 III (GMT900) Crew Cab Short Box |
| Type (Engine) | 4.8 Vortec V8 (295 Hp) 4WD 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) | 13.1 l/100 km (18 US mpg, 21.6 UK mpg) |
| Fuel Type | Petrol (Gasoline) |
| Power | 295 Hp @ 5600 rpm |
| Torque | 414 Nm @ 4600 rpm (305.35 lb.-ft. @ 4600 rpm) |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LY2 |
| Engine displacement | 4807 cm3 (293.34 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 96.01 mm (3.78 in.) |
| Piston Stroke | 83.06 mm (3.27 in.) |
| Compression ratio | 9.1:1 |
| 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 | 12.7 l (13.42 US qt | 11.17 UK qt) |
| Max. weight | 3175 kg (6999.68 lbs.) |
| 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 track | 1702 mm (67.01 in.) |
| Ride height (ground clearance) | 229 mm (9.02 in.) |
| Minimum turning circle | 14.4 m (47.24 ft.) |
| Approach angle | 15.3° |
| Departure angle | 22.4° |
| Ramp-over angle | 19.3° |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives rear wheels, front wheels engaged via clutch. |
| 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
The heart of this Sierra 1500 variant was the 4.8-liter (293 cubic inch) Vortec 4800 V8 engine, designated LY2. This engine was a member of GM’s Vortec family, known for its robust construction and relatively simple design. It featured a cast iron block and aluminum cylinder heads, utilizing a 9.1:1 compression ratio and a two-valve-per-cylinder OHV (Overhead Valve) configuration. Fuel delivery was handled by a multi-port fuel injection system, providing adequate power for everyday driving and towing. The engine produced 295 horsepower at 5600 rpm and 305 lb-ft of torque at 4600 rpm. The engine’s longitudinal mounting and rear-wheel-drive bias were typical for American full-size trucks. Power was transmitted to all four wheels through a four-speed Hydra-Matic automatic transmission, a reliable but somewhat dated unit by the late 2000s. This transmission offered smooth shifts but lacked the efficiency and responsiveness of newer transmissions with more gears.
Driving Characteristics
The 4.8L V8 and four-speed automatic combination delivered adequate, but not exhilarating, performance. Acceleration was sufficient for merging onto highways and passing slower vehicles, but it wasn’t a particularly quick truck. The automatic transmission’s gear ratios were geared towards maximizing fuel economy and providing smooth cruising, rather than aggressive acceleration. Compared to the available 5.3L and 6.0L V8 options, the 4.8L felt noticeably less powerful, especially when towing or hauling heavy loads. However, the 4.8L’s lower power output also contributed to slightly better fuel economy. The 4WD system provided enhanced traction in slippery conditions, making it suitable for light off-road use and inclement weather. The ride quality, typical of a full-size truck, was generally comfortable, but the leaf spring rear suspension could feel somewhat stiff when unloaded.
Equipment & Trim Levels
The Sierra 1500 with the 4.8L engine typically came standard with features like air conditioning, power windows and locks, an AM/FM stereo, and basic cloth upholstery. The Crew Cab configuration offered spacious seating for up to six passengers, making it a practical choice for families. Optional extras included upgraded audio systems, leather upholstery, power-adjustable seats, a sunroof, and various convenience packages. The specific trim level (e.g., SLE, SLT) determined the level of standard equipment and available options. This 4.8L variant often served as the entry point to the Crew Cab model line, offering a more affordable option for buyers who didn’t require the extra power or luxury features of the higher trims.
Chassis & Braking
The GMT900 Sierra 1500 featured a body-on-frame construction, providing a robust and durable platform. The front suspension utilized independent coil springs, while the rear suspension employed a traditional leaf spring setup. This configuration was designed to handle heavy loads and provide a comfortable ride. Braking duties were handled by disc brakes at the front and drum brakes at the rear. An Anti-lock Braking System (ABS) was standard, enhancing safety and control during emergency braking situations. The truck’s relatively high ground clearance (9.02 inches) allowed for moderate off-road capability.
Market Reception & Comparison
The Sierra 1500 with the 4.8L engine was generally well-received as a capable and affordable full-size pickup. Critics noted its comfortable ride, spacious interior, and adequate power for most everyday tasks. However, some reviewers criticized the four-speed automatic transmission as being outdated and less efficient than newer transmissions. Compared to the 5.3L V8, the 4.8L offered slightly better fuel economy but significantly less power. The 4.8L was often seen as a good value proposition for buyers who prioritized affordability and fuel efficiency over outright performance.
Legacy
The LY2 4.8L Vortec V8, paired with the 4L80-E four-speed automatic, proved to be a relatively reliable powertrain combination. While not known for exceptional fuel economy, it was generally durable and capable of lasting for many years with proper maintenance. Today, these trucks are readily available on the used car market at affordable prices. They remain popular choices for those seeking a capable and dependable work truck or family hauler. Common maintenance issues include oil leaks, sensor failures, and wear and tear on the suspension components. However, parts availability is generally good, and the relatively simple design of the engine makes it relatively easy to repair.
