The GMC Sierra 1500 IV (GMTK2XX) Regular Cab Long Box, equipped with the 5.3 EcoTec3 V8 engine and a 4WD automatic transmission, represents a significant iteration in GMC’s full-size pickup truck lineage. Produced from 2013 through 2015, this configuration occupied a sweet spot in the Sierra 1500 lineup, offering a balance of capability, fuel efficiency (enhanced by FlexFuel capability), and affordability. It was positioned as a workhorse option, appealing to buyers who needed the utility of a long bed and four-wheel drive without the premium price tag of higher trim levels or more powerful engine options.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 IV (GMTK2XX) Regular Cab Long Box |
| Type (Engine) | 5.3 EcoTec3 V8 (355/380 Hp) 4WD Automatic FlexFuel |
| Start of production | 2013 |
| End of production | 2015 |
| 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, 6.8 km/l) |
| Fuel consumption (extra urban) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| Fuel Type | Petrol / Ethanol – E85 |
| Weight-to-power ratio | 6.3 kg/Hp, 159.1 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 232.5 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 | 2232 kg (4920.72 lbs.) |
| Max. weight | 3175 kg (6999.68 lbs.) |
| Max load | 943 kg (2078.96 lbs.) |
| Trunk (boot) space – minimum | 2162 l (76.35 cu. ft.) |
| Fuel tank capacity | 128 l (33.81 US gal | 28.16 UK gal) |
| Permitted trailer load with brakes (12%) | 4490 kg (9898.76 lbs.) |
| Length | 5701 mm (224.45 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1875 mm (73.82 in.) |
| Wheelbase | 3378 mm (132.99 in.) |
| Front track | 1745 mm (68.7 in.) |
| Rear (Back) track | 1716 mm (67.56 in.) |
| Ride height (ground clearance) | 223 mm (8.78 in.) |
| Minimum turning circle (turning diameter) | 13.4 m (43.96 ft.) |
| Approach angle | 15.5° |
| Departure angle | 23.4° |
| Ramp-over (brakeover) angle | 21.3° |
| 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; 265/70 R17 |
| Wheel rims size | 8J x 17 |
INTRODUCTION
The fourth-generation GMC Sierra 1500 (GMTK2XX platform) represented a significant leap forward for GMC’s truck offerings. Introduced for the 2014 model year, it boasted improved refinement, technology, and capability compared to its predecessor. The Regular Cab Long Box configuration, paired with the 5.3-liter EcoTec3 V8 and a six-speed automatic transmission, was a popular choice for buyers prioritizing practicality and value. This combination offered a robust towing capacity, ample cargo space, and the added security of four-wheel drive, making it suitable for both work and recreational use. The FlexFuel capability allowed operation on gasoline or a blend of up to 85% ethanol, providing fuel flexibility and potentially lower running costs.
Powertrain & Engine Architecture
The heart of this Sierra 1500 is the 5.3-liter (325.13 cubic inches) L83 EcoTec3 V8 engine. This engine is characterized by its direct injection, active fuel management (cylinder deactivation), and variable valve timing. Direct injection improves combustion efficiency and power output, while active fuel management shuts down four cylinders during light-load conditions to conserve fuel. The L83 produces 355 horsepower at 5600 rpm and 382.79 lb-ft of torque at 4100 rpm. When running on E85 ethanol, power increases to 380 horsepower. The engine utilizes an overhead valve (OHV) valvetrain, a design choice that contributes to its durability and relatively simple maintenance. The six-speed Hydra-Matic automatic transmission is well-matched to the engine’s torque curve, providing smooth and responsive shifts. The transmission is electronically controlled and features a tow/haul mode for improved performance when towing heavy loads.
Driving Characteristics
The 5.3L V8 and six-speed automatic combination delivers adequate, though not exhilarating, performance. Acceleration is sufficient for everyday driving and moderate towing, but it won’t win any drag races. The automatic transmission is tuned for fuel efficiency, meaning it upshifts quickly to maintain lower engine speeds. This can sometimes result in the engine feeling slightly strained when climbing hills or accelerating with a load. Compared to the available 6.2L V8, the 5.3L offers less raw power, but it provides better fuel economy. The 4WD system provides enhanced traction in slippery conditions, making it a capable performer in snow, mud, and gravel. The long wheelbase contributes to a comfortable ride, but it also makes the truck feel large and less nimble in tight spaces.
Equipment & Trim Levels
The Regular Cab Long Box 5.3L 4WD Sierra 1500 typically came standard with features like air conditioning, power windows and locks, a basic audio system, and steel wheels. Higher trim levels, such as SLE and SLT, added features like alloy wheels, upgraded audio systems, a rearview camera, and more comfortable seating. Optional extras included a navigation system, a premium Bose audio system, leather upholstery, and various convenience packages. The interior was functional and durable, with a focus on practicality rather than luxury. The standard cloth seats provided adequate support, and the dashboard layout was straightforward and easy to use.
Chassis & Braking
The Sierra 1500 utilizes a body-on-frame construction, providing a robust and durable platform. The front suspension consists of independent coil springs, while the rear suspension employs a traditional leaf spring setup. This configuration is well-suited for carrying heavy loads and provides a comfortable ride. The braking system features ventilated disc brakes on all four wheels, providing ample stopping power. An anti-lock braking system (ABS) is standard, enhancing safety and control during emergency braking situations. The rear axle ratio varied depending on the specific configuration, influencing both towing capacity and fuel economy.
Market Reception & Comparison
The 2013-2015 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, spacious interior, and capable powertrain. However, some reviewers noted that the fuel economy was not class-leading, and the interior materials were not as refined as those found in some competitors. Compared to the Ford F-150 and Ram 1500, the Sierra 1500 offered a compelling combination of value and capability. The 5.3L V8 provided a good balance between power and fuel efficiency, making it a popular choice for buyers who didn’t need the extra power of the 6.2L V8.
Legacy
The L83 5.3L EcoTec3 V8 has proven to be a relatively reliable engine, with many examples exceeding 200,000 miles with proper maintenance. Common issues include oil consumption and occasional sensor failures, but these are generally not major concerns. The six-speed Hydra-Matic transmission is also known for its durability. On the used car market, these Sierra 1500s represent a good value, offering a capable and reliable truck at an affordable price. They remain popular choices for buyers who need a workhorse pickup truck that can handle a variety of tasks. The GMTK2XX platform laid the groundwork for future GMC truck generations, and the EcoTec3 engine family continues to be a mainstay of GMC’s powertrain lineup.
