The GMC Sierra 1500 III, specifically the Crew Cab Short Box configuration with the 5.3-liter Vortec V8 engine and automatic transmission, was a mainstay of GMC’s full-size pickup truck lineup from 2010 to 2013. Representing the third generation of the Sierra 1500 (GMT900 platform), this variant aimed to balance capability, comfort, and fuel efficiency within the highly competitive American truck market. It served as a popular choice for both personal and professional use, offering a spacious cabin and a proven powertrain. This particular combination represented a mid-range offering, positioned between the base V6 models and the more powerful 6.2-liter V8 options.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 III (GMT900) Crew Cab Short Box |
| Type (Engine) | 5.3 Vortec V8 (315/326 Hp) Automatic FlexFuel |
| Start of production | 2010 |
| End of production | 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 6 |
| Doors | 4 |
| Fuel consumption (urban) | 15.7 l/100 km (15 US mpg, 18 UK mpg) |
| Fuel consumption (extra urban) | 11.2 l/100 km (21 US mpg, 25.2 UK mpg) |
| Fuel Type | Petrol / Ethanol – E85 |
| Power | 315 Hp @ 5200 rpm |
| Power (Ethanol – E85) | 326 Hp @ 5300 rpm |
| Torque | 454 Nm @ 4400 rpm (334.85 lb.-ft. @ 4400 rpm) |
| Torque (Ethanol – E85) | 472 Nm @ 4400 rpm |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LC9, LMG |
| 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) |
| Max. weight | 3084 kg (6799.06 lbs.) |
| Trunk (boot) space – maximum | 1506 l (53.18 cu. ft.) |
| Fuel tank capacity | 98 l (25.89 US gal | 21.56 UK gal) |
| Permitted trailer load with brakes (12%) | 4354 kg (9598.93 lbs.) |
| Length | 5844 mm (230.08 in.) |
| Width including mirrors | 2031 mm (79.96 in.) |
| Height | 1875 mm (73.82 in.) |
| Wheelbase | 3645 mm (143.5 in.) |
| Front track | 1732 mm (68.19 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 | 22.8° |
| Ramp-over (brakeover) angle | 19.3° |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 6 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 (325 cubic inch) Vortec 5300 V8 engine. Available in two primary iterations – the LC9 and LMG – both shared a fundamental design. This engine is a traditional overhead valve (OHV) design, known for its simplicity and durability. The LC9 was the earlier version, while the LMG introduced Active Fuel Management (AFM), also known as cylinder deactivation, to improve fuel economy by shutting down four cylinders during light-load cruising. Both versions utilized multi-port fuel injection. The engine’s robust cast iron block and aluminum cylinder heads contributed to its longevity. The Hydra-Matic 6L80E six-speed automatic transmission was the sole transmission option. This transmission was known for its smooth shifting and reliability, offering a good balance between performance and efficiency. The transmission was electronically controlled, adapting to driving conditions and driver input.
Driving Characteristics
The 5.3L V8 with the 6L80E automatic provided adequate, though not exhilarating, performance. With 315 horsepower and 334.85 lb-ft of torque, the truck was capable of towing and hauling substantial loads. Acceleration from 0 to 60 mph typically took around 7.5-8.5 seconds. Compared to the 6.2L V8, this variant felt noticeably less powerful, particularly when fully loaded. However, it offered a more relaxed driving experience and better fuel economy. The automatic transmission’s gear ratios were optimized for towing and everyday driving, providing sufficient power in most situations. The AFM system, when equipped (LMG code), was generally unobtrusive, though some drivers reported a slight vibration when transitioning between V8 and V4 modes.
Equipment & Trim Levels
The Crew Cab Short Box 5.3L Automatic Sierra 1500 typically came standard with features like air conditioning, power windows and locks, a basic audio system, and cloth upholstery. Higher trim levels, such as the SLT and Denali, added features like leather upholstery, heated seats, a premium audio system, navigation, and a sunroof. Optional extras included a trailering package, upgraded wheels, and various convenience features. The interior design was functional and relatively straightforward, prioritizing durability and ease of use. The Crew Cab configuration offered a spacious rear seat, making it a comfortable option for families.
Chassis & Braking
The GMT900 platform utilized a fully boxed frame for enhanced rigidity and durability. The front suspension featured independent coil springs, while the rear suspension employed a traditional leaf spring setup. This configuration provided a comfortable ride, though it wasn’t as refined as some independent rear suspension designs. Brakes were disc brakes up front and drum brakes in the rear, with ABS as standard equipment. The braking system was adequate for the truck’s weight and intended use, but it wasn’t particularly sporty. The truck’s relatively high ground clearance (9.02 inches) made it capable of handling moderate off-road conditions.
Market Reception & Comparison
The GMC Sierra 1500 with the 5.3L V8 and automatic transmission was generally well-received by critics and consumers. It was praised for its comfortable ride, spacious interior, and proven reliability. Fuel economy was considered average for a full-size pickup truck, with the AFM-equipped LMG engine offering a slight improvement. Compared to the Ford F-150 and Ram 1500, the Sierra 1500 was often seen as a more refined and upscale option. However, some critics noted that the interior design was somewhat dated compared to its competitors. The 5.3L engine offered a good balance between power and efficiency, making it a popular choice for buyers who didn’t need the extra power of the 6.2L V8.
Legacy
The 5.3L Vortec V8 engine, particularly in the LC9 and LMG configurations, has proven to be remarkably durable and reliable. These engines are known to withstand high mileage with proper maintenance. The 6L80E transmission is also considered a robust and dependable unit. On the used car market, these Sierra 1500s remain relatively popular, offering a good value for buyers seeking a capable and reliable full-size pickup truck. Common maintenance items include oil changes, transmission fluid flushes, and spark plug replacements. The AFM system, when equipped, can sometimes experience issues with oil consumption, so regular monitoring of oil levels is recommended. Overall, this variant of the GMC Sierra 1500 represents a solid and dependable choice for those seeking a well-rounded full-size truck.
