The GMC Sierra 1500 V (GMTT1XX) Crew Cab Short Box, equipped with the 4.3L V6 engine and 4WD automatic transmission, represents a significant iteration of GMC’s full-size pickup truck lineage. Produced from 2018 to 2021, this variant occupied a key position in the Sierra 1500 lineup, offering a balance between capability, comfort, and affordability. It was part of the GMTT1XX generation, a platform shared with the Chevrolet Silverado, and aimed at buyers needing a versatile truck for both work and personal use. This configuration provided a step up from the base engine options while remaining more accessible than the larger V8s and diesel offerings.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 V (GMTT1XX) Crew Cab Short 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 | 5 |
| Doors | 4 |
| 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 | 7.8 kg/Hp, 127.7 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 185.1 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 | 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%) | 3356 kg (7398.71 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 |
Powertrain & Engine Architecture
The heart of this Sierra 1500 variant is the 4.3L LV3 V6 engine. This engine is a member of GM’s EcoTec3 family, known for its direct injection, variable valve timing, and cylinder deactivation technology. The direct injection system, coupled with a compression ratio of 11:1, contributes to improved fuel efficiency and power output. The cylinder deactivation system allows the engine to operate on four cylinders during light-load conditions, further enhancing fuel economy. The engine utilizes an overhead valve (OHV) valvetrain, a design choice that prioritizes compactness and simplicity. The 4.3L V6 is mated to a six-speed automatic transmission, providing smooth and responsive shifting. This transmission is electronically controlled and features a wide gear ratio spread to optimize both acceleration and fuel economy. 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 4.3L V6-powered Sierra 1500 delivers adequate performance for everyday driving and moderate towing needs. While not as quick as the larger V8 options, it provides sufficient power for merging onto highways and maintaining speed on inclines. The automatic transmission is well-tuned, offering smooth gear changes and a predictable driving experience. Compared to the manual transmission options available on other Sierra 1500 trims, the automatic prioritizes convenience over outright performance. The gear ratios are optimized for towing and hauling, but this can result in slightly higher engine speeds at highway cruising speeds. The 4WD system provides enhanced traction in slippery conditions, making it suitable for off-road use and inclement weather. The ride quality is generally comfortable, thanks to the independent front suspension and leaf spring rear suspension.
Equipment & Trim Levels
The Sierra 1500 V with the 4.3L V6 and 4WD was typically offered in SLE, Elevation, and AT4 trim levels. Standard features generally 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 added features such as leather upholstery, heated and ventilated front seats, a premium sound 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. The interior design was functional and durable, with a focus on providing a comfortable and practical cabin for both passengers and drivers.
Chassis & Braking
The Sierra 1500 V features a body-on-frame construction, providing a robust and durable platform. The front suspension utilizes independent coil springs, while the rear suspension employs a traditional leaf spring setup. This combination offers a good balance between ride comfort and load-carrying capacity. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Anti-lock brakes (ABS) are standard, enhancing safety and control during emergency braking situations. Steering is rack-and-pinion with electric power assist, offering precise and responsive handling.
Market Reception & Comparison
The 4.3L V6-powered Sierra 1500 was generally well-received by critics as a capable and affordable option in the full-size pickup truck segment. It offered a compelling alternative to the larger, more expensive V8 models, particularly for buyers who didn’t require maximum towing capacity or performance. Fuel economy was a strong point, with the cylinder deactivation system helping to improve efficiency. Compared to the 5.3L V8, the 4.3L V6 offered slightly lower performance but significantly better fuel economy. The 2.7L Turbo engine, introduced later in the generation, offered similar fuel economy with comparable power, but the 4.3L V6 remained a popular choice due to its proven reliability and simplicity.
Legacy
The 4.3L LV3 V6 engine has proven to be a reliable and durable powertrain. While not without its minor issues (such as occasional oil leaks), it generally requires minimal maintenance and offers long-term dependability. In the used car market, Sierra 1500 models equipped with this engine and transmission combination are often sought after by buyers looking for a capable and affordable truck. The GMTT1XX generation Sierra 1500, as a whole, is considered a well-rounded and practical pickup truck, and the 4.3L V6 variant represents a solid value proposition for those seeking a versatile and dependable workhorse.
