The GMC Sierra 1500 V (GMTT1XX) Crew Cab Short Box, equipped with the 5.3-liter V8 engine producing 355 horsepower and paired with a 4WD automatic transmission, represents a significant iteration of GMC’s full-size pickup truck. Produced from 2018 to 2021, this variant occupied a sweet spot in the Sierra 1500 lineup, offering a balance of capability, comfort, and technology for the American truck buyer. It was part of the fourth generation of the Sierra 1500, known internally as the GMTT1XX platform, which brought substantial improvements in materials, design, and features compared to its predecessors.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 V (GMTT1XX) Crew Cab Short Box |
| Type (Engine) | 5.3 V8 (355 Hp) 4WD Automatic |
| Start of production | 2018 |
| End of production | 2021 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 16.8 l/100 km (14 US mpg, 16.8 UK mpg, 6 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.3 kg/Hp, 159.1 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 232.6 Nm/tonne |
| Power | 355 Hp @ 5600 rpm |
| Power per litre | 66.6 Hp/l |
| Torque | 519 Nm @ 4100 rpm (382.79 lb.-ft. @ 4100 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | L82 |
| Engine displacement | 5328 cm3 (325.13 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 | 11:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV, VVT DI |
| Coolant | 12.8 l (13.53 US qt | 11.26 UK qt) |
| Cylinder deactivation system | Yes |
| Kerb Weight | 2231 kg (4918.51 lbs.) |
| Max. weight | 3266 kg (7200.3 lbs.) |
| Max load | 1035 kg (2281.78 lbs.) |
| Fuel tank capacity | 91 l (24.04 US gal | 20.02 UK gal) |
| Permitted trailer load with brakes (12%) | 4263 kg (9398.31 lbs.) |
| Length | 5886 mm (231.73 in.) |
| Width including mirrors | 2063 mm (81.22 in.) |
| Height | 1918 mm (75.51 in.) |
| Wheelbase | 3745 mm (147.44 in.) |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives rear wheels, front wheels engaged via clutch. |
| Number of gears and type of gearbox | 6 gears, automatic transmission |
| Front suspension | Independent coil spring |
| Rear suspension | Rigid axle suspension, Leaf spring |
| Front brakes | Ventilated discs, 330×30 mm |
| Rear brakes | Ventilated discs, 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; 265/70 R17; 265/65 R18 |
| Wheel rims size | 8.0J x 17; 8.5J x 18 |
INTRODUCTION
The 2018-2021 GMC Sierra 1500 V Crew Cab Short Box with the 5.3L V8 and 4WD automatic transmission was a mainstay of GMC’s sales volume. Positioned as a mid-range offering within the Sierra 1500 lineup, it slotted above the base models with the smaller 2.7L turbo-four and below the more powerful 6.2L V8 and the diesel options. This configuration appealed to buyers who needed a capable truck for both work and family duties, offering a comfortable ride and sufficient power for towing and hauling. The Crew Cab configuration provided ample interior space, while the short bed offered a balance between cargo capacity and maneuverability.
Powertrain & Engine Architecture
At the heart of this Sierra 1500 variant lies the GM L82 5.3-liter V8 engine. This engine is a member of GM’s Small Block family, known for its durability and relatively simple design. The L82 features direct injection, a variable valve timing (VVT) system, and Active Fuel Management (cylinder deactivation) to improve fuel economy. The direct injection system delivers fuel directly into the combustion chamber, enhancing efficiency and power output. The VVT system optimizes valve timing based on engine speed and load, further improving performance and fuel economy. Active Fuel Management allows the engine to shut down four cylinders during light-load conditions, such as highway cruising, to conserve fuel. The engine produces 355 horsepower at 5600 rpm and 383 lb-ft of torque at 4100 rpm.
The engine is mated to a six-speed automatic transmission (6L80-E). This transmission is known for its robustness and smooth shifting characteristics. It features electronically controlled shifting and a wide gear ratio spread to optimize both acceleration and fuel efficiency. The 4WD system is a traditional part-time system, allowing the driver to switch between two-wheel drive and four-wheel drive modes as needed.
Driving Characteristics
The 5.3L V8 and 6-speed automatic combination delivers a respectable driving experience. While not as quick as the 6.2L V8, the 5.3L provides ample power for everyday driving and towing. Acceleration is adequate, and the transmission shifts smoothly and predictably. The 6-speed automatic, while not having the number of gears found in newer transmissions, is well-matched to the engine’s torque curve. The truck feels planted and stable on the road, thanks to its robust chassis and well-tuned suspension. Towing capacity is substantial, allowing owners to comfortably haul trailers, boats, and other recreational equipment. Compared to the manual transmission options (available on other Sierra 1500 trims), the automatic provides a more relaxed and convenient driving experience, particularly in stop-and-go traffic.
Equipment & Trim Levels
The Sierra 1500 V (GMTT1XX) Crew Cab Short Box 5.3L 4WD typically came standard with features such as air conditioning, power windows and locks, a rearview camera, and a basic infotainment system with a touchscreen display. Higher trim levels, such as the SLE and Elevation, added features like leather upholstery, heated seats, a premium sound system, and advanced safety technologies like lane departure warning and forward collision alert. Optional extras included a sunroof, navigation system, and a trailering package. Interior materials were generally durable and well-appointed, offering a comfortable and functional cabin environment.
Chassis & Braking
The Sierra 1500 utilizes a fully boxed frame for enhanced rigidity and strength. The front suspension consists of independent coil springs, while the rear suspension features a traditional leaf spring setup. This combination provides a good balance between ride comfort and load-carrying capacity. Brakes are ventilated discs on all four wheels, providing ample stopping power. The ABS (Anti-lock Braking System) helps to maintain control during emergency braking situations. Steering is rack-and-pinion with electric power assist, offering precise and responsive handling.
Market Reception & Comparison
The GMC Sierra 1500 V with the 5.3L V8 and 4WD automatic was generally well-received by critics and consumers alike. It was praised for its comfortable ride, spacious interior, and capable powertrain. Fuel economy was considered average for a full-size pickup truck, but the Active Fuel Management system helped to mitigate fuel consumption during highway driving. Compared to the 2.7L turbo-four, the 5.3L V8 offered significantly more power and towing capacity. Compared to the 6.2L V8, the 5.3L was more affordable and offered a slightly better fuel economy. Reliability was generally good, although some owners reported minor issues with the infotainment system and electrical components.
Legacy
The GMTT1XX generation Sierra 1500, and specifically the 5.3L V8/4WD automatic variant, has proven to be a durable and reliable truck. On the used car market, these trucks hold their value relatively well, particularly those that have been well-maintained. The L82 5.3L V8 is known for its longevity, and the 6L80-E transmission is also considered to be a robust unit. While newer Sierra 1500 models offer more advanced technology and features, the 2018-2021 models remain a popular choice for buyers seeking a capable and dependable full-size pickup truck.
