The GMC Sierra 1500 V (GMTT1XX) Crew Cab Standard Box, equipped with the 5.3L V8 engine and 8-speed automatic transmission, represents a significant iteration of GMC’s full-size pickup truck. Produced from 2018 to 2021, this variant occupied a central position within the Sierra 1500 lineup, offering a balance between capability, comfort, and affordability. It was part of the fourth generation of the Sierra, known as the GMTT1XX platform, which brought substantial improvements in design, technology, and overall refinement compared to its predecessors. This configuration aimed to appeal to a broad range of buyers, from those needing a robust work truck to families seeking a spacious and versatile vehicle.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 V (GMTT1XX) Crew Cab Standard Box |
| Type (Engine) | 5.3 V8 (355 Hp) 8 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) | 13.8 l/100 km (17 US mpg) |
| Fuel consumption (extra urban) | 10.2 l/100 km (23.1 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.1 kg/Hp |
| Weight-to-torque ratio | 4.2 kg/Nm |
| 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 | L84 |
| 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 |
| Engine oil capacity | 7.6 l (8.03 US qt | 6.69 UK qt) |
| Coolant capacity | 13.1 l (13.84 US qt | 11.53 UK qt) |
| Kerb Weight | 2163 kg (4768.6 lbs.) |
| Max. weight | 3129 kg (6898.26 lbs.) |
| Max load | 966 kg (2129.67 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 | 6128 mm (241.26 in.) |
| Width including mirrors | 2063 mm (81.22 in.) |
| Height | 1914 mm (75.35 in.) |
| Wheelbase | 3987 mm (156.97 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 8 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 |
| Tires size | 255/70 R17; 265/70 R17; 265/65 R18 |
| Wheel rims size | 8.0J x 17; 8.5J x 18 |
Powertrain & Engine Architecture
At the heart of this Sierra 1500 variant lies the 5.3-liter L84 V8 engine. This engine is a member of GM’s Small Block family, known for its durability and relatively simple design. The L84 utilizes direct fuel injection (DFI) and Active Fuel Management (AFM), also known as cylinder deactivation, to improve fuel economy. AFM allows the engine to operate on four cylinders during light-load conditions, such as highway cruising. The engine features an overhead valve (OHV) valvetrain with variable valve timing (VVT) to optimize performance and efficiency across the rev range. The 8-speed automatic transmission (8L45) paired with the L84 provides smooth and efficient shifting. This transmission features electronically controlled shifting and a wide gear ratio spread, contributing to both improved acceleration and reduced fuel consumption.
Driving Characteristics
The 5.3L V8 with the 8-speed automatic delivers a comfortable and capable driving experience. While not as quick as the available 6.2L V8, the 5.3L provides ample power for everyday driving and towing. The 8-speed transmission keeps the engine in its optimal power band, resulting in responsive acceleration. The gear ratios are well-suited for both city and highway driving. Compared to manual transmission equipped Sierras, the automatic offers greater convenience, particularly in stop-and-go traffic. However, it does slightly diminish the driver’s control over gear selection. The weight distribution and suspension tuning contribute to a relatively smooth ride, even when the truck is lightly loaded.
Equipment & Trim Levels
The Sierra 1500 V with the 5.3L V8 and 8-speed automatic was available in various trim levels, including SLE, Elevation, and SLT. Standard features typically included air conditioning, power windows and locks, a touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, and a rearview camera. Higher trim levels, such as the SLT, added features like leather upholstery, heated and ventilated front seats, a premium audio system, and advanced safety technologies like blind-spot monitoring and rear cross-traffic alert. Optional extras included a sunroof, navigation system, and various towing packages.
Chassis & Braking
The Sierra 1500 V utilizes a body-on-frame construction, providing a robust and durable platform. The front suspension consists of independent coil springs, while the rear suspension employs a traditional leaf spring setup. This configuration balances ride comfort with load-carrying capacity. The braking system features ventilated disc brakes on all four wheels, providing adequate stopping power. Anti-lock brakes (ABS) are standard, enhancing safety during emergency braking situations. Steering is rack-and-pinion with electric power steering, offering a responsive and precise feel.
Market Reception & Comparison
The 5.3L V8/8-speed automatic combination was a popular choice among Sierra 1500 buyers. Critics praised the engine’s balance of power and fuel efficiency, as well as the smooth operation of the transmission. Compared to the 4.3L V6, the 5.3L offered a significant performance upgrade, making it a better choice for those who frequently tow or haul heavy loads. The 6.2L V8 provided even more power, but at a higher price point and with slightly lower fuel economy. Reliability was generally good, although some owners reported issues with the AFM system, which could lead to oil consumption problems.
Legacy
The GMTT1XX Sierra 1500, particularly the 5.3L V8/8-speed automatic variant, has established a reputation as a reliable and capable full-size pickup truck. On the used car market, these models remain relatively popular due to their proven track record and reasonable maintenance costs. The L84 engine, while not without its potential issues (like AFM-related oil consumption), is generally considered durable and long-lasting. With proper maintenance, these trucks can provide many years of service. The combination of a spacious cabin, comfortable ride, and ample power makes the Sierra 1500 V a compelling option for buyers seeking a versatile and dependable pickup truck.
