The GMC Sierra 1500 IV, produced from 2014 to 2015, represented a significant update to GMC’s full-size pickup truck line. This generation, designated GMTK2XX, offered a range of engine and configuration options, with the Regular Cab Long Box configuration paired with the 4.3 EcoTec3 V6 engine and a four-speed automatic transmission being a popular choice for buyers seeking a balance of capability and affordability. This particular variant occupied a position as the base engine option for those needing a work truck or a simpler, more economical full-size pickup. It served as a stepping stone for customers who didn’t require the higher performance or features of the 5.3L or 6.2L V8 options.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 IV (GMTK2XX) Regular Cab Long Box |
| Type (Engine) | 4.3 EcoTec3 V6 (285/297 Hp) 4WD Automatic FlexFuel |
| Start of production | 2014 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 3 |
| Doors | 2 |
| Fuel consumption (urban) | 13.8 l/100 km (17 US mpg) |
| Fuel consumption (extra urban) | 10.7 l/100 km (22 US mpg) |
| Fuel Type | Petrol / Ethanol – E85 |
| Weight-to-power ratio | 7.7 kg/Hp |
| Weight-to-torque ratio | 5.3 kg/Nm |
| Power | 285 Hp @ 5300 rpm |
| Power (Ethanol – E85) | 297 Hp @ 5300 rpm |
| Torque | 413 Nm @ 3900 rpm (304.61 lb.-ft. @ 3900 rpm) |
| Torque (Ethanol – E85) | 447 Nm @ 3900 rpm |
| Maximum engine speed | 5800 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LV3 |
| Engine displacement | 4300 cm3 (262.4 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 99.6 mm (3.92 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 | 5.7 l (6.02 US qt) |
| Coolant capacity | 14 l (14.79 US qt) |
| Kerb Weight | 2184 kg (4814.9 lbs.) |
| Max. weight | 3130 kg (6900.47 lbs.) |
| Max load | 946 kg (2085.57 lbs.) |
| Trunk (boot) space – minimum | 2162 l (76.35 cu. ft.) |
| Fuel tank capacity | 128 l (33.81 US gal) |
| Permitted trailer load with brakes (12%) | 3175 kg (6999.68 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 (67.5 in.) |
| Ride height (ground clearance) | 223 mm (8.78 in.) |
| Minimum turning circle (turning diameter) | 13.4 m (43.96 ft.) |
| Front brakes | Ventilated discs, 330×30 mm |
| Rear brakes | Ventilated discs, 345×20 mm |
| Number of gears and type of gearbox | 6 gears, automatic transmission Hydra-Matic |
INTRODUCTION
The 2014-2015 GMC Sierra 1500 with the 4.3L EcoTec3 V6 and four-speed automatic transmission was a work-oriented trim designed to provide a capable and relatively fuel-efficient full-size pickup. Built on the GMTK2XX platform, which also underpinned the Chevrolet Silverado, the Sierra aimed for a more premium feel than its Chevrolet counterpart. The Regular Cab Long Box configuration was particularly popular with commercial users and individuals who prioritized cargo space and towing capacity over passenger comfort. This variant represented the entry point into the Sierra 1500 lineup, offering a more affordable option compared to the 5.3L and 6.2L V8 models.
Powertrain & Engine Architecture
The heart of this Sierra 1500 is the 4.3L (262 cubic inch) EcoTec3 V6 engine, designated LV3. This engine is a naturally aspirated, 90-degree V6 featuring direct fuel injection, a variable valve timing system, and cylinder deactivation technology. The direct injection system improves fuel efficiency and power output by precisely controlling fuel delivery. Cylinder deactivation allows the engine to operate on fewer cylinders during light-load conditions, further enhancing fuel economy. The engine produces 285 horsepower at 5300 rpm and 305 lb-ft of torque at 3900 rpm. When running on E85 fuel, the engine output increases to 297 horsepower. The four-speed Hydra-Matic automatic transmission was a carryover from previous generations, providing smooth and reliable shifting. While not as technologically advanced as newer transmissions with more gears, it was well-suited to the engine’s torque curve and provided adequate performance for most tasks.
Driving Characteristics
The 4.3L V6 and four-speed automatic combination delivered adequate, though not exhilarating, performance. Acceleration was sufficient for everyday driving and light-duty hauling, but it lacked the punch of the larger V8 engines. The four-speed transmission, while reliable, had wider gear ratios than more modern transmissions, which could result in the engine feeling strained during highway passing maneuvers. The gear ratios were optimized for towing and hauling, prioritizing low-end torque over outright speed. In real-world conditions, this setup provided a comfortable and predictable driving experience, especially when not heavily loaded. The 4WD system provided enhanced traction in inclement weather and on unpaved surfaces.
Equipment & Trim Levels
The Regular Cab Long Box 4.3L Sierra 1500 typically came standard with basic features such as air conditioning, power windows and locks, and a basic audio system. Higher trim levels, such as SLE and SLT, added features like upgraded upholstery, a touchscreen infotainment system, and additional convenience features. Optional extras included a trailer hitch, bed liner, and various appearance packages. The interior was functional and durable, designed to withstand the rigors of work-truck use. The standard seating configuration accommodated three passengers, although the rear seat was relatively cramped.
Chassis & Braking
The Sierra 1500’s chassis featured independent coil spring suspension in the front and a traditional leaf spring suspension in the rear. This setup provided a comfortable ride quality, even when hauling heavy loads. The rear leaf springs were tuned to handle the weight of cargo and trailers. Braking duties were handled by ventilated disc brakes on all four wheels. An Anti-lock Braking System (ABS) was standard. The steering system utilized a rack-and-pinion setup with electric power steering, providing responsive and precise handling.
Market Reception & Comparison
Critics generally viewed the 4.3L Sierra 1500 as a competent and affordable work truck. While it didn’t offer the same level of performance or refinement as the V8 models, it provided a good value for buyers who prioritized practicality and fuel efficiency. Fuel economy was a key selling point, with EPA estimates of 17 mpg city and 22 mpg highway. Compared to the 5.3L V8, the 4.3L offered better fuel economy but significantly less power and towing capacity. The 4.3L was also generally more reliable than the early versions of the 5.3L EcoTec3, which were prone to oil consumption issues.
Legacy
The 4.3L EcoTec3 V6 proved to be a reliable and durable engine. While not as sought-after as the V8 models, the 4.3L Sierra 1500 remains a popular choice in the used truck market, particularly among buyers looking for an affordable and capable work truck. The four-speed automatic transmission, while dated, is known for its robustness. These trucks are often found with high mileage, but with proper maintenance, the powertrain can continue to provide years of service. The GMTK2XX platform, in general, has a good reputation for longevity, making these Sierra 1500s a practical and dependable option for those needing a full-size pickup.
