The GMC Sierra 1500 V, specifically the Regular Cab Long Box configuration powered by the 4.3L V6 engine and paired with a 4WD automatic transmission, represents a work-focused iteration of GMC’s full-size pickup truck. Produced from 2018 to 2021 as part of the GMTT1XX generation, this variant occupied a key position in the Sierra 1500 lineup, offering a balance of capability, affordability, and traditional truck values. It catered to buyers prioritizing utility and towing capacity over luxury appointments, often serving as fleet vehicles or for personal use where a no-frills, robust pickup was desired.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 V (GMTT1XX) Regular Cab Long Box |
| Type (Engine) | 4.3 V6 (285 Hp) 4WD Automatic |
| Start of production | 2018 |
| End of production | 2021 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (urban) | 15.7 l/100 km (15 US mpg, 18 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 | 7.5 kg/Hp, 132.8 Hp/tonne |
| Weight-to-torque ratio | 5.2 kg/Nm, 192.5 Nm/tonne |
| Power | 285 Hp @ 5300 rpm |
| Power per litre | 66.3 Hp/l |
| Torque | 413 Nm @ 3900 rpm (304.61 lb.-ft. @ 3900 rpm) |
| Maximum engine speed | 5800 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LV3 |
| Engine displacement | 4301 cm3 (262.46 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 99.6 mm (3.92 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 |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant capacity | 11.5 l (12.15 US qt | 10.12 UK qt) |
| Kerb Weight | 2146 kg (4731.12 lbs.) |
| Max. weight | 3130 kg (6900.47 lbs.) |
| Max load | 984 kg (2169.35 lbs.) |
| Fuel tank capacity | 107 l (28.27 US gal | 23.54 UK gal) |
| Permitted trailer load with brakes (12%) | 3447 kg (7599.33 lbs.) |
| Length | 5832 mm (229.61 in.) |
| Width including mirrors | 2063 mm (81.22 in.) |
| Height | 1921 mm (75.63 in.) |
| Wheelbase | 3545 mm (139.57 in.) |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives rear wheels, front 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 |
| Steering type | Steering rack and pinion |
| Power steering | Electric |
| Tires size | 255/70 R17; 265/70 R17 |
| Wheel rims size | 8.0J x 17 |
INTRODUCTION
The 2018-2021 GMC Sierra 1500 V Regular Cab Long Box with the 4.3L V6 and 4WD automatic transmission was a mainstay of GMC’s truck offerings. Built on the GMTT1XX platform, this configuration provided a robust and practical solution for buyers needing a capable pickup without the added cost and complexity of higher trim levels or larger engines. The “V” designation within the Sierra 1500 lineup signified a focus on value and work-oriented features. This model year represented a significant update for the Sierra 1500, incorporating modern technology and safety features while retaining the core attributes of a traditional American pickup.
Powertrain & Engine Architecture
At the heart of this Sierra 1500 variant lies the GM LV3 4.3L V6 engine. This engine is a member of the GM Small-Block engine family, utilizing a 90-degree V-configuration. It features direct fuel injection, a robust cast iron block, and aluminum cylinder heads. The overhead valve (OHV) valvetrain, while traditional, contributes to the engine’s durability and relatively simple maintenance requirements. The 4.3L V6 produces 285 horsepower at 5300 rpm and 305 lb-ft of torque at 3900 rpm. The engine’s torque curve is relatively flat, providing usable power across a wide range of engine speeds.
The engine is mated to a 6-speed automatic transmission (likely the 6L48-E) designed to handle the engine’s output and the demands of towing and hauling. This transmission features electronically controlled shifting and is known for its reliability. The 4WD system is a traditional part-time system, allowing the driver to switch between two-wheel drive and four-wheel drive as needed.
Driving Characteristics
The 4.3L V6 and 6-speed automatic combination delivers adequate, though not exhilarating, performance. Acceleration is sufficient for everyday driving and moderate towing, but it won’t match the quicker response of the available 5.3L or 6.2L V8 engines. The automatic transmission is tuned for smooth shifts and fuel efficiency, prioritizing usability over sporty performance. The gear ratios are optimized for towing and hauling, providing ample low-end torque. Compared to manual transmission equipped Sierras, the automatic offers greater convenience, especially in stop-and-go traffic, but sacrifices some driver control and potentially fuel economy. The 4WD system provides enhanced traction in slippery conditions, making it suitable for off-road use and inclement weather.
Equipment & Trim Levels
The Regular Cab Long Box 4.3L 4WD Sierra 1500 typically served as an entry-level or mid-range trim. Standard features generally included air conditioning, a basic infotainment system with a touchscreen display, power windows and locks, and a rearview camera. Interior upholstery was typically vinyl or cloth. Optional extras could include upgraded infotainment systems with navigation, a trailering package, and various convenience features. The interior design was functional and durable, prioritizing practicality over luxury.
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 is designed to handle heavy loads and provide a comfortable ride. Braking duties are handled by ventilated disc brakes on all four wheels. The anti-lock braking system (ABS) is standard, enhancing safety and control during emergency braking situations. The steering system is a rack-and-pinion setup with electric power steering, providing responsive and precise handling.
Market Reception & Comparison
Critics generally viewed the 4.3L V6 Sierra 1500 as a competent and affordable work truck. While it lacked the prestige and performance of the V8-powered models, it offered a compelling value proposition for buyers prioritizing utility and fuel efficiency. Fuel economy was respectable for a full-size pickup, averaging around 15-20 mpg in real-world driving conditions. Compared to the 5.3L V8, the 4.3L offered better fuel economy but less power and towing capacity. The 4.3L also proved to be a reliable powertrain, with relatively few reported issues.
Legacy
The 4.3L V6-powered Sierra 1500 has established a reputation for durability and reliability in the used car market. Its relatively simple engine design and robust construction contribute to its longevity. These trucks remain popular choices for buyers seeking a capable and affordable pickup. While not as sought-after as the V8 models, the 4.3L Sierra 1500 offers a practical and dependable option for those needing a workhorse truck without breaking the bank. The GMTT1XX platform, in general, is considered a solid and well-engineered design, further enhancing the long-term appeal of this Sierra 1500 variant.
