The GMC Sierra 1500 V, specifically the Regular Cab Long Box configuration powered by the 4.3L V6 engine paired with an automatic transmission, was a mainstay of GMC’s full-size pickup truck lineup from the 2018 to 2021 model years. Representing the GMTT1XX generation, this variant occupied a crucial position as an entry-level offering, providing a balance of capability and affordability for buyers prioritizing work-truck functionality over luxury appointments. It served as a direct competitor to similar offerings from Ford and Ram, appealing to customers needing a robust, reliable pickup for everyday tasks and light-duty hauling.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 V (GMTT1XX) Regular Cab Long 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 | 2 |
| Doors | 2 |
| 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 | 7.2 kg/Hp, 139 Hp/tonne |
| Weight-to-torque ratio | 5 kg/Nm, 201.5 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 | 11.5 l (12.15 US qt | 10.12 UK qt) |
| Kerb Weight | 2050 kg (4519.48 lbs.) |
| Max. weight | 3084 kg (6799.06 lbs.) |
| Max load | 1034 kg (2279.58 lbs.) |
| Fuel tank capacity | 107 l (28.27 US gal | 23.54 UK gal) |
| Permitted trailer load with brakes (12%) | 3583 kg (7899.16 lbs.) |
| Length | 5832 mm (229.61 in.) |
| Width including mirrors | 2063 mm (81.22 in.) |
| Height | 1920 mm (75.59 in.) |
| Wheelbase | 3545 mm (139.57 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 |
| Wheel rims size | 8.0J x 17 |
Powertrain & Engine Architecture
The heart of this Sierra 1500 variant is the LV3 4.3L V6 engine. This engine is a member of GM’s small-block V8 family, though configured with six cylinders. It features a 90-degree V-angle and utilizes an overhead valve (OHV) valvetrain, a design choice prioritizing simplicity and durability over ultimate performance. Direct fuel injection is employed, contributing to improved fuel efficiency and throttle response. The engine produces 285 horsepower at 5300 rpm and 305 lb-ft of torque at 3900 rpm. The engine also incorporates cylinder deactivation technology, allowing it to operate on fewer cylinders during light-load conditions to further enhance fuel economy. The engine is mated to a six-speed automatic transmission, a common choice for this class of truck, providing smooth shifts and adequate gear ratios for both towing and everyday driving. The transmission is electronically controlled, adapting shift points based on driving conditions and throttle input.
Driving Characteristics
The 4.3L V6 and six-speed automatic combination in the Sierra 1500 delivered a competent, if not exhilarating, driving experience. Acceleration was adequate for typical use, but noticeably slower than the available 5.3L V8 or 6.2L V8 options. The automatic transmission was tuned for practicality, prioritizing smooth shifts and fuel efficiency over aggressive downshifts. The gear ratios were well-suited for hauling and towing, providing sufficient low-end torque. However, passing maneuvers at highway speeds required careful planning. The rear-wheel-drive configuration provided a traditional truck feel, with a focus on durability and simplicity. The ride quality, while generally comfortable, was firm due to the truck’s heavy-duty suspension and leaf spring rear setup.
Equipment & Trim Levels
The 4.3L V6 Sierra 1500 typically served as the base model, offering a relatively sparse but functional equipment list. Standard features generally included air conditioning, a basic infotainment system with a touchscreen display, Bluetooth connectivity, and power windows and locks. The interior typically featured vinyl upholstery and durable plastic trim. Optional extras included upgraded infotainment systems with navigation, a premium sound system, cloth or leather upholstery, and various convenience packages. The Regular Cab configuration meant limited passenger space, making it best suited for single drivers or those occasionally carrying a passenger.
Chassis & Braking
The Sierra 1500 V utilized a body-on-frame construction, providing a robust and durable platform. The front suspension consisted of independent coil springs, while the rear suspension employed a traditional leaf spring setup. This configuration prioritized load-carrying capacity and durability over refined handling. Braking duties were handled by ventilated disc brakes at all four corners, providing adequate stopping power for the truck’s weight. Anti-lock braking system (ABS) was standard. Steering was rack-and-pinion with electric power assist, offering a reasonable balance of feel and ease of use.
Market Reception & Comparison
Critics generally viewed the 4.3L V6 Sierra 1500 as a capable work truck, but acknowledged its limitations in terms of performance compared to its V8-powered siblings. Fuel economy was considered average for the segment. The V6 offered a lower price point, making it attractive to budget-conscious buyers. Compared to the 5.3L V8, the 4.3L offered significantly less power and towing capacity, but also better fuel economy. The 6.2L V8 provided the highest level of performance but came at a substantial price premium. Reliability was generally good, with the 4.3L V6 proving to be a durable and dependable engine.
Legacy
The 4.3L V6-powered Sierra 1500 has established a reputation as a reliable and affordable full-size pickup truck. On the used car market, these models represent a good value for buyers seeking a capable work truck without the expense of a V8 engine. While not known for its speed or luxury, the 4.3L Sierra 1500 remains a popular choice for those needing a durable and dependable pickup for everyday tasks. The LV3 engine, while not a high-performance unit, has proven to be relatively trouble-free, contributing to the long-term appeal of these trucks.
