The GMC Sierra 1500 IV, specifically the Crew Cab Standard Box configuration with the 4.3 EcoTec3 V6 engine and four-wheel drive, 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 efficiency and affordability within the Sierra 1500 range. It served as a popular choice for buyers seeking a versatile truck for both work and family use, offering a step up in features from the base models while remaining more accessible than the higher-trim levels equipped with larger engines.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 IV (GMTK2XX, facelift 2016) Crew Cab Standard Box |
| Type (Engine) | 4.3 EcoTec3 V6 (285/297 Hp) 4WD 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) | 13.8 l/100 km (17 US mpg, 20.5 UK mpg, 7.2 km/l) |
| Fuel consumption (extra urban) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| Fuel Type | Petrol / Ethanol – E85 |
| Weight-to-power ratio | 8.5 kg/Hp, 117.8 Hp/tonne |
| Weight-to-torque ratio | 5.9 kg/Nm, 170.7 Nm/tonne |
| Power | 285 Hp @ 5300 rpm (297 Hp @ 5300 rpm on E85) |
| Power per litre | 66.3 Hp/l (69.1 Hp/l on E85) |
| 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 capacity | 14 l (14.79 US qt | 12.32 UK qt) |
| Kerb Weight | 2419 kg (5332.98 lbs.) |
| Max. weight | 3220 kg (7098.88 lbs.) |
| Max load | 801 kg (1765.9 lbs.) |
| Trunk (boot) space – minimum | 1728 l (61.02 cu. ft.) |
| Fuel tank capacity | 98 l (25.89 US gal | 21.56 UK gal) |
| Permitted trailer load with brakes (12%) | 3175 kg (6999.68 lbs.) |
| Length | 6067 mm (238.86 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1875 mm (73.82 in.) |
| Wheelbase | 3886 mm (152.99 in.) |
| Front track | 1745 mm (68.7 in.) |
| Rear (Back) track | 1716 mm (67.56 in.) |
| Ride height (ground clearance) | 227 mm (8.94 in.) |
| Minimum turning circle (turning diameter) | 14.8 m (48.56 ft.) |
| Approach angle | 17.5° |
| Departure angle | 23° |
| Ramp-over (brakeover) angle | 17.7° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| 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 |
INTRODUCTION
The 2016-2018 GMC Sierra 1500 Crew Cab with the 4.3 EcoTec3 V6 and 4WD automatic transmission occupied a crucial middle ground in the Sierra lineup. Positioned above the base 2.7L four-cylinder engine and below the more powerful 5.3L and 6.2L V8 options, it catered to buyers who prioritized a balance of fuel economy, towing capacity, and everyday usability. The “EcoTec3” designation signified a family of engines featuring direct injection, variable valve timing, and cylinder deactivation technology aimed at improving efficiency. The facelift introduced in 2016 brought updated styling, enhanced interior features, and improved technology compared to the previous generation.
Powertrain & Engine Architecture
The heart of this Sierra variant is the 4.3L (262.4 cubic inch) LV3 EcoTec3 V6 engine. This engine is a naturally aspirated, 90-degree V6 featuring aluminum cylinder heads and a cast iron block. It utilizes direct fuel injection, delivering fuel directly into the combustion chamber for improved efficiency and power. The valvetrain employs overhead valves (OHV) with two valves per cylinder. A key feature of the EcoTec3 engines is Active Fuel Management (cylinder deactivation), which allows the engine to operate on only four cylinders during light-load conditions, further enhancing fuel economy. The engine is capable of running on gasoline or E85 flex fuel, with a slight power increase (297 hp) when using E85. The engine is mated to a six-speed Hydra-Matic automatic transmission, known for its smooth shifting and durability. This transmission is electronically controlled and features overdrive for highway cruising.
Driving Characteristics
The 4.3L V6, while not delivering the outright acceleration of the larger V8s, provides adequate power for most everyday driving situations. With 285 horsepower and 304 lb-ft of torque, it offers a respectable towing capacity (up to approximately 7,600 lbs when properly equipped). The six-speed automatic transmission is well-tuned, providing smooth and predictable shifts. However, the transmission’s gear ratios are optimized for fuel efficiency rather than performance, meaning acceleration can feel somewhat leisurely, especially when fully loaded or towing. Compared to the 5.3L V8, the 4.3L feels noticeably less powerful, particularly in passing situations. The 4WD system provides enhanced traction in inclement weather and off-road conditions, but it’s primarily geared towards on-road stability rather than serious off-roading.
Equipment & Trim Levels
The 4.3L V6 was typically offered in the SLE, SLT, and AT4 trim levels. Standard equipment on the SLE included features like air conditioning, power windows and locks, a basic infotainment system with a touchscreen display, and a rearview camera. The SLT trim added features such as leather upholstery, heated front seats, a premium audio system, and additional chrome exterior trim. The AT4 trim, introduced later in the production run, focused on off-road capability with features like skid plates, all-terrain tires, and a more aggressive exterior appearance. Optional extras included a navigation system, a sunroof, and advanced safety features like lane departure warning and forward collision alert.
Chassis & Braking
The Sierra 1500 IV utilizes a body-on-frame construction, providing a robust and durable platform. The front suspension features 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. ABS (Anti-lock Braking System) is standard. The rear axle ratio varies depending on the specific configuration, but typically falls in the range of 3.23:1 to 3.42:1. The standard tire size is 245/70R17 or 265/70R17, depending on the trim level.
Market Reception & Comparison
Critics generally praised the 4.3L EcoTec3 V6 for its fuel efficiency and adequate power, but noted that it lacked the refinement and performance of the larger V8 engines. Fuel economy figures averaged around 17 mpg city and 22 mpg highway, making it a more economical choice than the V8 models. Compared to competitors like the Ford F-150 with its 3.5L EcoBoost V6, the Sierra 4.3L offered a more traditional V6 experience, lacking the turbocharged punch of the Ford. Reliability reports suggest that the 4.3L EcoTec3 engine is generally reliable, although some owners have reported issues with oil consumption and the Active Fuel Management system.
Legacy
The 4.3L EcoTec3 V6-powered Sierra 1500 remains a popular choice in the used truck market. Its combination of affordability, capability, and relatively good fuel economy makes it an attractive option for buyers seeking a versatile full-size pickup. While not as sought-after as the V8 models, the 4.3L offers a compelling value proposition, particularly for those who don’t require the maximum towing capacity or performance. The engine’s durability and the availability of parts contribute to its continued appeal in the used car market. The GMTK2XX platform itself proved to be a robust and reliable design, ensuring that these Sierras continue to provide years of service.
