The GMC Sierra 1500 IV, specifically the Crew Cab Short Box configuration with the 4.3 EcoTec3 V6 engine and automatic transmission, represents a significant iteration in GMC’s full-size pickup truck lineage. Produced from 2016 to 2018 as part of the GMTK2XX platform’s facelift, this variant aimed to balance capability with affordability, offering a compelling option for buyers seeking a versatile and comfortable truck. This model year saw updates to the exterior styling, interior features, and technology, building upon the foundation laid by the previous generation. The 4.3L V6/automatic powertrain combination positioned itself as a mainstream offering within the Sierra 1500 lineup, slotting below the more powerful 5.3L and 6.2L V8 options.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 IV (GMTK2XX, facelift 2016) Crew Cab Short Box |
| Type (Engine) | 4.3 EcoTec3 V6 (285/297 Hp) Automatic FlexFuel |
| Start of production | 2016 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 13 l/100 km (18.1 US mpg, 21.7 UK mpg, 7.7 km/l) |
| Fuel consumption (extra urban) | 9.8 l/100 km (24 US mpg, 28.8 UK mpg, 10.2 km/l) |
| Fuel Type | Petrol / Ethanol – E85 |
| Weight-to-power ratio | 8 kg/Hp, 124.7 Hp/tonne |
| Weight-to-torque ratio | 5.5 kg/Nm, 180.7 Nm/tonne |
| Power | 285 Hp @ 5300 rpm |
| Power per litre | 66.3 Hp/l |
| Power (Ethanol – E85) | 297 Hp @ 5300 rpm |
| Power per litre (Ethanol – E85) | 69.1 Hp/l |
| Torque | 413 Nm @ 3900 rpm (304.61 lb.-ft. @ 3900 rpm) |
| Torque (Ethanol – E85) | 447 Nm @ 3900 rpm |
| Maximum engine speed | 5800 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LV3 |
| Engine displacement | 4300 cm3 (262.4 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 | 14 l (14.79 US qt | 12.32 UK qt) |
| Kerb Weight | 2285 kg (5037.56 lbs.) |
| Max. weight | 3130 kg (6900.47 lbs.) |
| Max load | 845 kg (1862.91 lbs.) |
| Trunk (boot) space – minimum | 1512 l (53.4 cu. ft.) |
| Fuel tank capacity | 98 l (25.89 US gal | 21.56 UK gal) |
| Permitted trailer load with brakes (12%) | 2495 kg (5500.53 lbs.) |
| Length | 5825 mm (229.33 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1884 mm (74.17 in.) |
| Wheelbase | 3645 mm (143.5 in.) |
| Front track | 1747 mm (68.78 in.) |
| Rear (Back) track | 1716 mm (67.56 in.) |
| Ride height (ground clearance) | 222 mm (8.74 in.) |
| Minimum turning circle (turning diameter) | 14.4 m (47.24 ft.) |
| Approach angle | 17.2° |
| Departure angle | 23.9° |
| Ramp-over (brakeover) angle | 19.2° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission Hydra-Matic |
| 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 | 245/70 R17; 265/70 R17 |
| Wheel rims size | 8J x 17 |
Powertrain & Engine Architecture
The heart of this Sierra 1500 variant is the 4.3L LV3 EcoTec3 V6 engine. This engine is a naturally aspirated, direct-injected powerplant featuring Active Fuel Management (cylinder deactivation) to improve fuel economy. The LV3 utilizes a 11:1 compression ratio and an overhead valve (OHV) valvetrain configuration. Direct injection allows for precise fuel delivery, enhancing both power and efficiency. The engine is capable of running on gasoline or E85 flex fuel, with a slight power increase when utilizing E85. The engine is mated to a six-speed Hydra-Matic automatic transmission, chosen for its smooth shifting and durability. This transmission is calibrated to provide adequate power delivery for everyday driving and towing, though it isn’t geared for outright performance.
Driving Characteristics
The 4.3L V6 and six-speed automatic combination delivers a comfortable and capable driving experience. While not as quick as the V8-powered Sierra models, the 4.3L provides sufficient power for most daily driving scenarios and moderate towing needs. The automatic transmission is tuned for smooth shifts and generally avoids hunting for gears. The gear ratios are optimized for fuel efficiency and towing, rather than aggressive acceleration. The weight of the Crew Cab Short Box configuration does impact acceleration, but the engine’s torque output at lower RPMs helps with initial responsiveness. Compared to the manual transmission options, the automatic prioritizes convenience and ease of use, making it a popular choice for drivers who don’t require maximum performance.
Equipment & Trim Levels
The 4.3L V6 engine was typically offered in the SLE, SLT, and Denali trim levels. Standard features on the SLE included air conditioning, power windows and locks, a basic infotainment system, and cloth upholstery. The SLT trim added features like leather upholstery, heated front seats, a more advanced infotainment system with a larger touchscreen, and additional safety features. The Denali trim, the most luxurious option, included premium leather, unique exterior styling, and a host of convenience and technology features. Optional extras across all trims included a navigation system, a premium sound system, a sunroof, and various driver-assistance technologies.
Chassis & Braking
The Sierra 1500 IV 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 balance ride comfort with load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, with ABS as standard. The rear brakes are slightly smaller in diameter than the front brakes. Steering is rack-and-pinion with electric power assist, providing a responsive and comfortable steering feel.
Market Reception & Comparison
The 4.3L V6 Sierra 1500 was generally well-received by critics as a practical and affordable option in the full-size truck segment. It offered a good balance of power, fuel economy, and capability. Compared to the 5.3L V8, the 4.3L delivered slightly better fuel economy but less overall power and towing capacity. The 4.3L was often praised for its smooth operation and comfortable ride. Reliability reports suggest that the LV3 engine is generally dependable, though routine maintenance is crucial. Fuel economy figures averaged around 18 mpg in the city and 24 mpg on the highway, making it a relatively efficient option for a full-size truck.
Legacy
The 4.3L EcoTec3 V6-powered Sierra 1500 has established itself as a reliable and affordable option in the used truck market. The LV3 engine has proven to be relatively durable, with many examples exceeding 150,000 miles with proper maintenance. The combination of a comfortable cabin, capable powertrain, and available features makes it a popular choice for buyers seeking a versatile and practical full-size pickup. While not the most powerful or luxurious option in the Sierra 1500 lineup, the 4.3L V6 variant represents a compelling value proposition for those prioritizing affordability and everyday usability.
