The GMC Sierra 1500 V (GMTT1XX) Regular Cab Standard Box, equipped with the 4.3L V6 engine and 4WD automatic transmission, was a configuration offered by GMC from the 2018 to 2021 model years. This variant occupied a key position in the Sierra 1500 lineup, serving as a work-focused, value-oriented option for buyers prioritizing capability and affordability over luxury features. It represented a core offering within the broader GMTT1XX platform, which underpinned the redesigned Sierra 1500 series.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 V (GMTT1XX) Regular Cab Standard 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 | 7.4 kg/Hp |
| Weight-to-torque ratio | 5.1 kg/Nm |
| 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 | 2095 kg (4618.68 lbs.) |
| Max. weight | 3084 kg (6799.06 lbs.) |
| Max load | 989 kg (2180.37 lbs.) |
| Permitted trailer load with brakes (12%) | 3493 kg (7700.75 lbs.) |
| Length | 5356 mm (210.87 in.) |
| Width including mirrors | 2063 mm (81.22 in.) |
| Height | 1927 mm (75.87 in.) |
| Wheelbase | 3213 mm (126.5 in.) |
| Drivetrain Architecture | All wheel drive (4×4) |
| 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, 345 mm |
| Rear brakes | Ventilated discs, 360 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 |
| Wheel rims size | 8.0J x 17 |
Powertrain & Engine Architecture
At the heart of this Sierra 1500 variant lies the LV3 4.3L V6 engine. This engine is a member of GM’s small-block V6 family, utilizing an overhead valve (OHV) valvetrain configuration. The LV3 features direct fuel injection, contributing to improved efficiency and power delivery. The engine produces 285 horsepower at 5300 rpm and 304.61 lb.-ft. of torque at 3900 rpm. The engine incorporates cylinder deactivation technology, allowing it to operate on fewer cylinders during light-load conditions to further enhance fuel economy. The engine is longitudinally mounted in the chassis. The powertrain is paired with a six-speed automatic transmission, chosen for its durability and suitability for truck applications. This transmission is electronically controlled, optimizing shift points for both performance and fuel efficiency.
Driving Characteristics
The 4.3L V6 and six-speed automatic combination delivered a balance of capability and usability. While not as quick as the available 5.3L or 6.2L V8 engines, the 4.3L provided sufficient power for everyday driving and moderate towing duties. The automatic transmission offered smooth shifts, but the gear ratios were tuned more for work than for sporty acceleration. Compared to manual transmission equipped Sierra 1500s, the automatic offered greater convenience, particularly in stop-and-go traffic. However, it did result in a slight reduction in fuel economy and a less engaging driving experience. The 4WD system provided enhanced traction in inclement weather and off-road conditions, making it a versatile choice for a wide range of applications.
Equipment & Trim Levels
The 4.3L V6 automatic configuration was typically offered in lower to mid-range trim levels of the Sierra 1500, such as the base model and the SLE. Standard features generally included air conditioning, a basic infotainment system with a touchscreen display, and cloth upholstery. Optional extras commonly included upgraded infotainment systems with navigation, leather upholstery, power-adjustable seats, and a variety of driver-assistance features. The interior design was functional and durable, prioritizing practicality over luxury. The regular cab configuration offered seating for two passengers and a standard box bed length, making it ideal for work-focused buyers.
Chassis & Braking
The Sierra 1500 V (GMTT1XX) utilized a body-on-frame construction, providing a robust and durable platform. The front suspension featured independent coil springs, while the rear suspension employed a traditional leaf spring setup. This configuration was optimized for load-carrying capacity and ride comfort. Braking duties were handled by ventilated disc brakes on all four wheels, with larger rotors at the rear (360mm) compared to the front (345mm). An anti-lock braking system (ABS) was standard equipment. The steering system employed a rack-and-pinion setup with electric power steering, providing responsive and precise handling.
Market Reception & Comparison
The 4.3L V6 Sierra 1500 was generally well-received by critics as a capable and affordable work truck. It offered a compelling value proposition for buyers who didn’t require the extra power of the V8 engines. Fuel economy was considered adequate for a full-size pickup, although it lagged behind some of the newer, more fuel-efficient competitors. Compared to the 5.3L V8, the 4.3L offered lower initial cost and slightly better fuel economy, but at the expense of performance and towing capacity. The 4.3L was often seen as a more sensible choice for buyers who primarily used their trucks for commuting and light-duty tasks.
Legacy
The LV3 4.3L V6 engine and the six-speed automatic transmission proved to be relatively reliable powertrains. While not without their share of common issues (such as oil leaks and occasional transmission hiccups), these components generally held up well over time with proper maintenance. In the used car market, Sierra 1500s equipped with the 4.3L V6 and 4WD automatic are often sought after by buyers looking for a dependable and affordable work truck. Their lower price point and reasonable running costs make them an attractive option for those who don’t need the added capability of a larger engine. The GMTT1XX platform itself is known for its durability, contributing to the long-term appeal of these trucks.
