The GMC Sierra 1500 IV, specifically the Crew Cab Short Box configuration with the 6.2 EcoTec3 V8 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 deliver a blend of robust capability, refined comfort, and modern technology to the American truck market. It occupied a premium position within the Sierra 1500 lineup, offering a substantial step up in power and features compared to the base engine options.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 IV (GMTK2XX, facelift 2016) Crew Cab Short Box |
| Type (Engine) | 6.2 EcoTec3 V8 (420 Hp) 4WD Automatic |
| Start of production | 2016 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 15.6 l/100 km (15.1 US mpg, 18.1 UK mpg, 6.4 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 | 5.9 kg/Hp, 168.9 Hp/tonne |
| Weight-to-torque ratio | 4 kg/Nm, 250.6 Nm/tonne |
| Power | 420 Hp @ 5600 rpm |
| Power per litre | 68.2 Hp/l |
| Torque | 623 Nm @ 4100 rpm (459.5 lb.-ft. @ 4100 rpm) |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | L86 |
| Engine displacement | 6162 cm3 (376.03 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 103.25 mm (4.06 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 11.5:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant | 14.8 l (15.64 US qt | 13.02 UK qt) |
| Kerb Weight | 2486 kg (5480.69 lbs.) |
| Max. weight | 3266 kg (7200.3 lbs.) |
| Max load | 780 kg (1719.61 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%) | 4127 kg (9098.48 lbs.) |
| Length | 5825 mm (229.33 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1879 mm (73.98 in.) |
| Wheelbase | 3645 mm (143.5 in.) |
| Front track | 1745 mm (68.7 in.) |
| Rear (Back) track | 1716 mm (67.56 in.) |
| Ride height (ground clearance) | 226 mm (8.9 in.) |
| Minimum turning circle (turning diameter) | 14.4 m (47.24 ft.) |
| Approach angle | 17.4° |
| Departure angle | 23.2° |
| Ramp-over (brakeover) angle | 19.0° |
| 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 | 8 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
At the heart of this Sierra 1500 variant lies the 6.2-liter EcoTec3 V8 engine, designated as the L86. This engine is a naturally aspirated, aluminum-block V8 featuring direct fuel injection, cylinder deactivation, and a variable valve timing system. The direct injection system optimizes combustion efficiency and power output, while cylinder deactivation allows the engine to operate on four cylinders during light-load conditions, improving fuel economy. The OHV valvetrain, while traditional, is optimized for low-end torque. The engine produces 420 horsepower at 5600 rpm and 459.5 lb-ft of torque at 4100 rpm. This power is delivered through an eight-speed Hydra-Matic automatic transmission, known for its smooth shifting and wide gear ratio spread. The transmission is electronically controlled, adapting to driving conditions and driver input for optimal performance.
Driving Characteristics
The 6.2L V8 and eight-speed automatic combination delivers a noticeably different driving experience compared to the lower-displacement engine options. Acceleration is brisk, and the truck feels confident when towing or hauling heavy loads. The eight-speed transmission keeps the engine in its optimal power band, providing responsive acceleration in most situations. While not as fuel-efficient as the smaller engines, the 6.2L offers a compelling balance of power and usability. The 4WD system provides enhanced traction in various conditions, making it suitable for both on-road and off-road driving. Compared to a manual transmission equipped Sierra, the automatic prioritizes ease of use and convenience over outright driver engagement.
Equipment & Trim Levels
The Crew Cab Short Box 6.2L 4WD typically came well-equipped, often positioned as a mid-to-high trim level. Standard features generally included a leather-appointed interior, heated and ventilated front seats, a premium audio system, an 8-inch touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, and a suite of safety features such as lane departure warning and forward collision alert. Optional extras could include a sunroof, navigation system, and advanced trailering packages. Interior upholstery was typically cloth or leather, with various color options available. The dashboard layout was functional and driver-focused, with intuitive controls and a clear instrument cluster.
Chassis & Braking
The Sierra 1500 IV utilizes a fully boxed frame for enhanced rigidity and durability. The front suspension features independent coil springs, while the rear suspension employs a traditional leaf spring setup. This configuration provides a comfortable ride while maintaining a high payload capacity. Braking duties are handled by ventilated disc brakes on all four wheels, with ABS standard. The rear brakes are slightly smaller in diameter than the front brakes. The steering system is a rack-and-pinion setup with electric power steering, providing precise and responsive handling.
Market Reception & Comparison
The 6.2L Sierra 1500 received generally positive reviews from automotive critics. It was praised for its powerful engine, smooth transmission, and comfortable ride. However, fuel economy was often cited as a drawback compared to the smaller engine options. Compared to the 5.3L V8, the 6.2L offered a significant power increase, making it a better choice for those who frequently tow or haul heavy loads. Compared to the diesel options, the 6.2L provided a simpler and potentially more reliable powertrain, albeit with lower fuel economy and torque.
Legacy
The L86 6.2L EcoTec3 V8 has proven to be a relatively reliable engine, with few widespread issues reported. The eight-speed Hydra-Matic transmission has also demonstrated good durability. In the used car market, these Sierra 1500s hold their value reasonably well, particularly those in good condition with low mileage. The combination of power, capability, and comfort makes them a desirable choice for truck buyers seeking a well-rounded full-size pickup. Regular maintenance, including oil changes and fluid checks, is crucial for ensuring the long-term reliability of this powertrain.
