The GMC Sierra 1500 IV, specifically the Crew Cab Short Box configuration with the 6.2 EcoTec3 V8 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 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 V8 (420 Hp) 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 | 5.6 kg/Hp, 177.4 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 263.1 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 | 2368 kg (5220.55 lbs.) |
| Max. weight | 3175 kg (6999.68 lbs.) |
| Max load | 807 kg (1779.13 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%) | 4218 kg (9299.1 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 | 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 |
INTRODUCTION
The 2016-2018 GMC Sierra 1500 Crew Cab Short Box equipped with the 6.2-liter EcoTec3 V8 and automatic transmission was positioned as a premium offering within GMC’s light-duty truck range. Building upon the GMTK2XX platform introduced in 2014, the facelifted model brought updated styling, enhanced technology, and continued refinement of the EcoTec3 engine family. The Crew Cab configuration provided ample passenger space, while the Short Box offered a balance between cargo capacity and maneuverability. This particular variant catered to buyers seeking a powerful and comfortable truck for both work and personal use.
Powertrain & Engine Architecture
At the heart of this Sierra 1500 variant lies the L86 6.2-liter EcoTec3 V8 engine. This naturally aspirated engine utilizes direct injection, a valvetrain configuration of overhead valves (OHV), and active fuel management (cylinder deactivation) to optimize both power and fuel efficiency. The direct injection system delivers fuel directly into the combustion chamber, improving combustion efficiency and power output. The cylinder deactivation system allows the engine to operate on four cylinders during light-load conditions, further enhancing fuel economy. The engine produces 420 horsepower at 5600 rpm and 459.5 lb.-ft. of torque at 4100 rpm. The Hydra-Matic 8-speed automatic transmission was the sole transmission option for this engine, providing smooth and efficient gear changes. This transmission was chosen for its ability to handle the engine’s substantial torque output and contribute to improved fuel economy compared to older automatic transmissions.
Driving Characteristics
The 6.2L V8 and 8-speed automatic combination delivered a noticeably more spirited driving experience compared to the Sierra 1500’s smaller engine options. Acceleration was brisk, and the truck felt confident when towing or hauling heavy loads. The 8-speed transmission helped keep the engine in its optimal power band, providing responsive acceleration in various driving situations. While not as fuel-efficient as the smaller engines, the 6.2L offered a compelling balance of power and usability. The automatic transmission’s gear ratios were tuned for both towing capability and comfortable highway cruising. Compared to a manual transmission equipped Sierra, the automatic offered ease of use, particularly in stop-and-go traffic, but sacrificed some driver engagement.
Equipment & Trim Levels
The Crew Cab Short Box 6.2L Sierra 1500 typically came well-equipped, often including features like a touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, a rearview camera, keyless entry, and available features like leather upholstery, heated and ventilated front seats, a premium sound system, and advanced safety technologies such as lane departure warning and forward collision alert. Trim levels varied, with the Denali trim representing the pinnacle of luxury and features. Standard interior features included cloth upholstery, though leather was a popular upgrade. The dashboard layout was functional and driver-focused, with intuitive controls and a comfortable seating position.
Chassis & Braking
The Sierra 1500’s chassis featured an independent coil spring front suspension and a rigid axle rear suspension with leaf springs. This configuration provided a comfortable ride while maintaining robust load-carrying capacity. Braking duties were handled by ventilated discs at all four corners, with ABS (Anti-lock Braking System) as standard equipment. The braking system was adequately sized for the truck’s weight and power, providing confident stopping performance. The rear axle was typically a semi-floating design, suitable for the truck’s intended payload capacity.
Market Reception & Comparison
Critics generally praised the 6.2L EcoTec3 V8 for its strong performance and refined operation. The 8-speed automatic transmission was also well-received for its smooth shifting and contribution to improved fuel economy. Compared to the 5.3L V8, the 6.2L offered a significant power boost, making it a better choice for those who frequently tow or haul heavy loads. However, the 6.2L commanded a higher price and offered slightly lower fuel economy. Compared to competitors like the Ford F-150 and Ram 1500, the Sierra 1500 with the 6.2L engine held its own in terms of performance, features, and overall value.
Legacy
The L86 6.2L EcoTec3 V8 has proven to be a relatively reliable engine, with few widespread issues reported. Proper maintenance, including regular oil changes and coolant flushes, is crucial for long-term durability. In the used car market, Sierra 1500s equipped with this engine and transmission combination hold their value well, particularly those in good condition with a well-documented maintenance history. The combination of power, capability, and comfort continues to make this variant a desirable choice for truck buyers seeking a well-rounded full-size pickup.
