The GMC Sierra 1500, a full-size pickup truck manufactured by General Motors, has been a mainstay of the American automotive landscape for decades. The fourth generation, designated GMTK2XX, underwent a significant facelift in 2016, bringing updated styling and technology. This article focuses specifically on the 2016-2018 Regular Cab Standard Box configuration equipped with the 5.3-liter EcoTec3 V6 engine producing 355 horsepower (380 hp on E85 fuel), paired with a 6-speed automatic transmission and a four-wheel drive system. This variant occupied a middle ground in the Sierra 1500 lineup, offering a balance of capability, fuel efficiency, and affordability, appealing to buyers needing a robust work truck without the premium features of higher trims.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 IV (GMTK2XX, facelift 2016) Regular Cab Standard Box |
| Type (Engine) | 5.3 EcoTec3 V6 (355/380 Hp) 4WD Automatic FlexFuel |
| Start of production | 2016 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 3 |
| Doors | 2 |
| Fuel consumption (urban) | 14.7 l/100 km (16 US mpg, 19.2 UK mpg) |
| Fuel consumption (extra urban) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg) |
| Fuel Type | Petrol / Ethanol – E85 |
| Weight-to-power ratio | 6.3 kg/Hp, 158.6 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 231.8 Nm/tonne |
| Power | 355 Hp @ 5600 rpm |
| Power per litre | 66.6 Hp/l |
| Power (Ethanol – E85) | 380 Hp @ 5600 rpm |
| Power per litre (Ethanol – E85) | 71.3 Hp/l |
| Torque | 519 Nm @ 4100 rpm (382.79 lb.-ft. @ 4100 rpm) |
| Torque (Ethanol – E85) | 564 Nm @ 4100 rpm |
| Maximum engine speed | 5800 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | L83 |
| Engine displacement | 5328 cm3 (325.13 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 96 mm (3.78 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 | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant | 14.8 l (15.64 US qt | 13.02 UK qt) |
| Kerb Weight | 2239 kg (4936.15 lbs.) |
| Max. weight | 3084 kg (6799.06 lbs.) |
| Max load | 845 kg (1862.91 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%) | 2994 kg (6600.64 lbs.) |
| Length | 5206 mm (204.96 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1883 mm (74.13 in.) |
| Wheelbase | 3023 mm (119.02 in.) |
| Front track | 1745 mm (68.7 in.) |
| Rear (Back) track | 1716 mm (67.56 in.) |
| Ride height (ground clearance) | 218 mm (8.58 in.) |
| Minimum turning circle (turning diameter) | 12.2 m (40.03 ft.) |
| Approach angle | 15.2° |
| Departure angle | 24.9° |
| Ramp-over (brakeover) angle | 24.1° |
| 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; 265/65 R17 |
| Wheel rims size | 8J x 17 |
Powertrain & Engine Architecture
The heart of this Sierra 1500 is the 5.3-liter L83 EcoTec3 V8 engine. This engine represents a significant advancement in GM’s small-block V8 technology, featuring direct injection, active fuel management (cylinder deactivation), and variable valve timing. The direct injection system allows for precise fuel delivery, improving efficiency and power output. Active Fuel Management enables the engine to operate on four cylinders during light-load conditions, further enhancing fuel economy. The Hydra-Matic 6L80 six-speed automatic transmission is a robust and well-proven unit, known for its smooth shifting and durability. The transmission is electronically controlled, adapting shift points based on driving conditions and throttle input. The 4WD system is a traditional part-time system, allowing the driver to switch between two-wheel drive and four-wheel drive as needed.
Driving Characteristics
The 5.3L V8 with the 6-speed automatic provides adequate power for everyday driving and moderate towing. While not as quick as the 6.2L V8 option, the 5.3L offers a good balance of performance and fuel economy. The automatic transmission is tuned for smooth operation, prioritizing comfort over aggressive shifting. The gear ratios are optimized for towing and hauling, providing ample low-end torque. Compared to a manual transmission equipped Sierra, this automatic version sacrifices some driver engagement but gains in ease of use, particularly in stop-and-go traffic. The 4WD system provides enhanced traction in slippery conditions, making it suitable for both on-road and off-road use.
Equipment & Trim Levels
The Regular Cab Standard Box configuration typically came with a relatively basic level of equipment. Standard features generally included air conditioning, power windows and locks, a basic audio system, and vinyl upholstery. Optional extras included upgraded audio systems, a rearview camera, and various convenience packages. The interior was functional and durable, designed for work rather than luxury. Higher trim levels, such as the SLE and SLT, added features like leather upholstery, heated seats, and advanced infotainment systems, but the base model focused on providing essential functionality at an affordable price point.
Chassis & Braking
The Sierra 1500 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 well-suited for handling heavy loads and providing a comfortable ride. Braking duties are handled by ventilated disc brakes on all four wheels, providing adequate stopping power. An Anti-lock Braking System (ABS) is standard, enhancing safety and control during emergency braking situations. The rear leaf spring suspension, while effective for load carrying, can result in a slightly less refined ride compared to independent rear suspension systems found in some competitors.
Market Reception & Comparison
The 2016-2018 GMC Sierra 1500 with the 5.3L V8 and automatic transmission was generally well-received by critics and consumers. It was praised for its comfortable ride, capable engine, and robust construction. Fuel economy was considered average for a full-size pickup truck. Compared to the 5.3L with a manual transmission, the automatic offered greater convenience, while the 6.2L V8 provided significantly more power but at a higher cost. The Sierra 1500 competed directly with the Ford F-150, Ram 1500, and Chevrolet Silverado, each offering similar capabilities and features.
Legacy
The L83 5.3L EcoTec3 V8 has proven to be a relatively reliable engine, with few major issues reported. The 6L80 automatic transmission is also known for its durability. In the used car market, these Sierra 1500s represent a good value for buyers seeking a capable and affordable full-size pickup truck. Regular maintenance, including oil changes and fluid checks, is crucial for ensuring long-term reliability. The combination of a proven powertrain, robust construction, and readily available parts makes this Sierra 1500 a practical and dependable choice for years to come.
