The GMC Sierra 1500 IV, specifically the Regular Cab Standard Box configuration with the 5.3 EcoTec3 V6 engine and automatic transmission, was a mainstay of GMC’s full-size pickup truck lineup from 2016 to 2018. This variant represented a popular balance between capability, affordability, and everyday usability within the fourth generation (GMTK2XX) Sierra 1500 series, which received a significant facelift in 2016. Positioned as a work-oriented or fleet-focused option, it offered a robust powertrain and practical features for owners needing a dependable truck without the added expense of higher trim levels or extended cab configurations.
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) 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) | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg) |
| Fuel Type | Petrol / Ethanol – E85 |
| Weight-to-power ratio | 6 kg/Hp, 167.4 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 244.7 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 | 2121 kg (4676 lbs.) |
| Max. weight | 2994 kg (6600.64 lbs.) |
| Max load | 873 kg (1924.64 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%) | 3130 kg (6900.47 lbs.) |
| Length | 5206 mm (204.96 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1879 mm (73.98 in.) |
| Wheelbase | 3023 mm (119.02 in.) |
| Front track | 1747 mm (68.78 in.) |
| Rear (Back) track | 1716 mm (67.56 in.) |
| Ride height (ground clearance) | 209 mm (8.23 in.) |
| Minimum turning circle (turning diameter) | 12.2 m (40.03 ft.) |
| Approach angle | 14.5° |
| Departure angle | 25.0° |
| Ramp-over (brakeover) angle | 24.4° |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| 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 Regular Cab with the 5.3L EcoTec3 V8 and automatic transmission was a popular choice for buyers seeking a no-nonsense, capable pickup. This configuration slotted into the Sierra 1500 lineup as a mid-range offering, providing a step up in power and features from the base 4.3L V6 models, while remaining more accessible than the more luxurious trims like the SLT or Denali. Built on the GMTK2XX platform, the facelifted Sierra benefitted from updated styling, improved interior materials, and enhanced technology compared to pre-2016 models. The Regular Cab configuration, with its two doors and standard box, prioritized practicality and affordability over passenger space and convenience.
Powertrain & Engine Architecture
At the heart of this Sierra 1500 variant lies the 5.3-liter EcoTec3 L83 V8 engine. This engine is a naturally aspirated, direct-injected powerplant featuring Active Fuel Management (cylinder deactivation) to improve fuel economy under light load conditions. The L83 produces 355 horsepower at 5600 rpm and 382.79 lb-ft of torque at 4100 rpm. When running on E85 flex fuel, output increases to 380 horsepower and 422 lb-ft of torque. The engine utilizes a robust cast iron block with aluminum cylinder heads and a variable valve timing system. The Hydra-Matic 6L80 six-speed automatic transmission was the sole transmission option for this configuration. This transmission is known for its durability and smooth shifting characteristics. It features electronically controlled shifting and overdrive for highway efficiency.
Driving Characteristics
The combination of the 5.3L V8 and the 6L80 automatic transmission delivers a balanced driving experience. While not as quick as some of the lighter-duty pickups or those equipped with larger engines, the Sierra 1500 provides ample power for everyday tasks, towing, and hauling. The automatic transmission is tuned for smooth, comfortable shifts, prioritizing usability over aggressive performance. The 6L80’s gear ratios are well-suited for both city and highway driving, providing adequate acceleration and maintaining reasonable engine speeds at cruising speeds. Compared to the base 4.3L V6, the 5.3L offers a noticeable improvement in acceleration and towing capacity. However, it doesn’t quite match the performance of the available 6.2L V8. The Regular Cab’s shorter wheelbase contributes to a slightly firmer ride compared to extended cab models.
Equipment & Trim Levels
The 2016-2018 GMC Sierra 1500 Regular Cab with the 5.3L engine typically came standard with features such as air conditioning, power windows and locks, a basic infotainment system with a touchscreen display, and a rearview camera. Higher trim levels, such as the SLE and Elevation, added features like upgraded cloth or leather upholstery, a larger touchscreen display with Apple CarPlay and Android Auto compatibility, heated front seats, and a premium audio system. Optional extras included a trailer brake controller, a navigation system, and various appearance packages. The interior design was functional and durable, with a focus on practicality rather than luxury.
Chassis & Braking
The Sierra 1500’s chassis features a fully boxed frame for enhanced strength and rigidity. The front suspension utilizes an independent coil spring design, while the rear suspension employs a traditional leaf spring setup. This configuration provides a good balance between ride comfort and load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, with ABS (Anti-lock Braking System) as standard equipment. The rear brakes are slightly smaller in diameter than the front brakes. Steering is rack-and-pinion with electric power assist, providing responsive and precise handling.
Market Reception & Comparison
The GMC Sierra 1500 with the 5.3L V8 and automatic transmission was generally well-received by critics and consumers alike. It was praised for its robust powertrain, comfortable ride, and practical features. Fuel economy was considered average for a full-size pickup truck, with the E85 flex fuel capability offering a potential cost savings for those with access to ethanol fuel. Compared to the Ford F-150 and Ram 1500, the Sierra 1500 offered a competitive combination of features and value. The 5.3L engine provided a good balance between power and efficiency, making it a popular choice for buyers who didn’t need the extra performance of the 6.2L V8.
Legacy
The 5.3L EcoTec3 V8 and 6L80 automatic transmission pairing has proven to be a reliable and durable powertrain combination. These engines are known for their longevity and relatively low maintenance costs. On the used car market, these Sierra 1500s remain popular choices for buyers seeking a dependable and capable pickup truck. While newer trucks offer more advanced technology and features, the 2016-2018 Sierra 1500 continues to provide a solid value proposition, offering a proven powertrain and a practical design at an affordable price point. Common issues are relatively minor, often related to sensors or routine maintenance items, contributing to the powertrain’s overall reputation for reliability.
