The GMC Sierra 1500 V (GMTT1XX) Crew Cab Standard Box, equipped with the 4.3L V6 engine and automatic transmission, was a popular configuration within the redesigned Sierra 1500 lineup produced from 2018 to 2021. This variant represented a balance between capability and affordability, targeting buyers who needed the space of a crew cab and the utility of a standard bed, but didn’t require the higher performance or premium features of the larger engine options. It served as a workhorse for many, offering a comfortable ride and respectable towing capacity for its class.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 V (GMTT1XX) Crew Cab Standard Box |
| Type (Engine) | 4.3 V6 (285 Hp) 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) | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel consumption (extra urban) | 11.2 l/100 km (21 US mpg, 25.2 UK mpg, 8.9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.6 kg/Hp, 131.8 Hp/tonne |
| Weight-to-torque ratio | 5.2 kg/Nm, 190.9 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 | 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%) | 3447 kg (7599.33 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 | 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 |
| 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, specifically the Crew Cab Standard Box configuration with the 4.3L V6 and automatic transmission, represented a significant update to GMC’s full-size pickup truck line. Built on the GMTT1XX platform, this generation aimed to provide a more refined and technologically advanced experience compared to its predecessors. This particular variant occupied the entry-level position within the Crew Cab offerings, providing a more accessible price point for buyers prioritizing space and practicality over outright performance. It was positioned below the 5.3L and 6.2L V8 options, and the diesel variant, catering to a different segment of the truck market.
Powertrain & Engine Architecture
The heart of this Sierra 1500 is the LV3 4.3L V6 engine. This engine is a member of GM’s small-block V6 family, utilizing an aluminum cylinder head and a cast iron block. It features direct fuel injection, a crucial technology for maximizing fuel efficiency and power output. The engine employs an overhead valve (OHV) valvetrain, a design choice that prioritizes simplicity and reliability. The 4.3L V6 produces 285 horsepower at 5300 rpm and 305 lb-ft of torque at 3900 rpm. Paired with this engine is a six-speed automatic transmission (likely the 6L80), known for its smooth shifting and durability. This transmission is electronically controlled, adapting to driving conditions and driver input for optimal performance. Cylinder deactivation technology is also incorporated, allowing the engine to operate on fewer cylinders during light-load situations, further enhancing fuel economy.
Driving Characteristics
The 4.3L V6 and six-speed automatic combination delivers adequate, though not exhilarating, performance. Acceleration is sufficient for everyday driving and moderate towing, but it won’t match the responsiveness of the V8 models. The automatic transmission is well-tuned, providing smooth gear changes and a predictable driving experience. The gear ratios are optimized for both fuel efficiency and towing capability. Compared to the manual transmission options (available on other Sierra 1500 trims), the automatic prioritizes convenience and ease of use. Against the 5.3L V8, the 4.3L feels noticeably less powerful, especially when fully loaded or towing a substantial trailer. However, the V6 offers a more manageable driving experience for those who don’t require the extra power.
Equipment & Trim Levels
The base trim level for the 4.3L V6 Crew Cab Sierra 1500 typically included standard features such as air conditioning, a basic infotainment system with a touchscreen display, Bluetooth connectivity, and a rearview camera. Interior upholstery was typically cloth, with durable vinyl flooring. Higher trim levels, such as SLE and Elevation, added features like upgraded infotainment systems with Apple CarPlay and Android Auto compatibility, heated seats, power-adjustable seats, and more premium interior materials. Optional extras included a trailer towing package, a navigation system, and various safety features like lane departure warning and forward collision alert.
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, offering a comfortable ride. The rear suspension employs a traditional leaf spring setup, designed to handle heavy loads. Braking duties are handled by ventilated disc brakes on all four wheels, providing adequate stopping power. ABS (Anti-lock Braking System) is standard. The rear axle ratio varied depending on the specific configuration, impacting both fuel economy and towing capacity. Stabilizer bars were included to reduce body roll during cornering.
Market Reception & Comparison
Critics generally praised the 4.3L V6 Sierra 1500 for its value proposition. It offered a compelling combination of space, capability, and affordability. Fuel economy was considered respectable for a full-size pickup, though not class-leading. Reliability was generally good, with the 4.3L V6 proving to be a durable and dependable engine. Compared to the 5.3L V8, the 4.3L offered lower fuel consumption but significantly less power. The 4.3L was often seen as a good choice for buyers who primarily used their trucks for commuting and light-duty tasks, while the V8 was preferred by those who frequently towed or hauled heavy loads.
Legacy
The 4.3L V6-powered Sierra 1500 has proven to be a reliable and long-lasting truck in the used car market. The LV3 engine is known for its durability, and the six-speed automatic transmission has a good track record. These trucks represent a good value for buyers seeking a capable and affordable full-size pickup. While not as sought-after as the V8 models, the 4.3L Sierra 1500 remains a popular choice for those who prioritize practicality and fuel efficiency. Regular maintenance, including oil changes and fluid checks, is crucial for ensuring the continued longevity of this powertrain.
