The GMC Sierra 1500 IV, specifically the Crew Cab Standard Box configuration with the 6.2 EcoTec3 V8 engine and four-wheel drive 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 Standard 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) | 15.7 l/100 km (15 US mpg, 18 UK mpg, 6.4 km/l) |
| Fuel consumption (extra urban) | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6 kg/Hp, 167.7 Hp/tonne |
| Weight-to-torque ratio | 4 kg/Nm, 248.7 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 | 2505 kg (5522.58 lbs.) |
| Max. weight | 3266 kg (7200.3 lbs.) |
| Max load | 761 kg (1677.72 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%) | 4128 kg (9100.68 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 | 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 with the 6.2L EcoTec3 V8 and 4WD automatic transmission was a flagship offering within the Sierra 1500 range. Positioned above the 4.3L V6 and 5.3L V8 options, it catered to buyers needing substantial towing capacity and power for work or recreational activities. The “GMTK2XX” designation refers to the truck’s platform, which underwent a significant refresh in 2016, bringing updated styling, enhanced interior materials, and improved technology. The Crew Cab configuration provided ample passenger space, making it a popular choice for families and those frequently carrying multiple passengers. This particular variant was a mainstay in the North American market, competing directly with offerings from Ford, Ram, and Chevrolet.
Powertrain & Engine Architecture
At the heart of this Sierra 1500 variant lies the L86 6.2-liter EcoTec3 V8 engine. This engine is a naturally aspirated, direct-injected powerplant featuring aluminum cylinder heads and a cast iron block. The EcoTec3 family was designed for efficiency and power, utilizing features like cylinder deactivation (Active Fuel Management) to improve fuel economy during light-load driving. The direct injection system precisely meters fuel into the cylinders, optimizing combustion and enhancing performance. The engine employs an overhead valve (OHV) valvetrain, a design choice prioritizing compactness and low-end torque. The 6.2L engine produces 420 horsepower at 5600 rpm and 623 lb-ft of torque at 4100 rpm. Paired with this engine is the Hydra-Matic 8L90 eight-speed automatic transmission. This transmission offers a wide gear ratio spread, contributing to both improved acceleration and fuel efficiency. The 8L90 is known for its smooth shifting and responsiveness, and its ability to handle the engine’s substantial torque output.
Driving Characteristics
The 6.2L V8 and 8-speed automatic combination delivers a noticeably more powerful and refined 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 ample torque for merging onto highways and navigating challenging terrain. While not as fuel-efficient as the smaller engines, the cylinder deactivation system helps mitigate fuel consumption during highway cruising. The 4WD system provides enhanced traction in inclement weather or off-road conditions. Compared to a manual transmission equipped Sierra, the automatic offers greater convenience, particularly in stop-and-go traffic, but sacrifices some driver engagement and control.
Equipment & Trim Levels
The Crew Cab Standard Box 6.2L 4WD Sierra 1500 typically came well-equipped, even in its base trim. Standard features often included air conditioning, power windows and locks, a rearview camera, and a basic infotainment system with a touchscreen display. Higher trim levels, such as the SLT and Denali, added features like leather upholstery, heated and ventilated front seats, a premium sound system, navigation, and advanced safety technologies. Optional extras included a sunroof, upgraded wheels, and various appearance packages. Interior upholstery typically consisted of cloth in lower trims, with leather becoming standard on higher-end models. Dashboard configurations varied depending on the trim level, with higher trims featuring more premium materials and finishes.
Chassis & Braking
The Sierra 1500 IV utilizes a fully boxed frame for enhanced rigidity and durability. The front suspension consists of independent coil springs, while the rear suspension employs a traditional leaf spring setup. This configuration provides a good balance of ride comfort and load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, with larger rotors typically found on higher trim levels. An Anti-lock Braking System (ABS) is standard. The rear axle ratios varied depending on the specific configuration, influencing both towing capacity and fuel economy. The truck’s relatively high ground clearance (227mm / 8.94 inches) allows for moderate off-road capability.
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, some reviewers noted that the fuel economy was relatively low compared to competitors with smaller engines. Compared to the 5.3L V8, the 6.2L offered a significant performance boost, but at a higher price point. The 6.2L was also more expensive to maintain due to its larger displacement and more complex engine management system. Against rivals like the Ford F-150 with the 3.5L EcoBoost V6, the Sierra 1500 6.2L offered a different driving experience, prioritizing traditional V8 power and torque over turbocharged efficiency.
Legacy
The L86 6.2L EcoTec3 V8 has proven to be a relatively reliable engine, although some owners have reported issues with oil consumption and Active Fuel Management system components. The 8L90 transmission is also generally considered durable, but like any complex automatic transmission, it requires regular maintenance to ensure longevity. On the used car market, the 2016-2018 Sierra 1500 Crew Cab 6.2L 4WD commands a premium price compared to models with smaller engines, reflecting its superior performance and capability. These trucks remain popular choices for buyers seeking a powerful and versatile full-size pickup.
