The GMC Sierra 1500 IV (GMTK2XX) Crew Cab Short Box, equipped with the 4.3 EcoTec3 V6 engine and a six-speed automatic transmission, was a popular configuration within the fourth generation of GMC’s full-size pickup truck line. Produced from 2013 to 2015, this variant occupied a key position in the Sierra 1500 lineup, offering a balance between capability, fuel efficiency, and affordability. It catered to buyers seeking a versatile truck for both work and family use, without the higher price tag associated with the larger V8 engines.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 IV (GMTK2XX) Crew Cab Short Box |
| Type (Engine) | 4.3 EcoTec3 V6 (285/297 Hp) Automatic FlexFuel |
| Start of production | 2013 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 13.1 l/100 km (18 US mpg) |
| Fuel consumption (extra urban) | 9.4 l/100 km (25 US mpg) |
| Fuel Type | Petrol / Ethanol – E85 |
| Weight-to-power ratio | 7.9 kg/Hp |
| Weight-to-torque ratio | 5.4 kg/Nm |
| Power | 285 Hp @ 5300 rpm |
| Power per litre | 66.3 Hp/l |
| Power (Ethanol – E85) | 297 Hp @ 5300 rpm |
| Power per litre (Ethanol – E85) | 69.1 Hp/l |
| 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 | 5.02 UK qt) |
| Coolant | 14 l (14.79 US qt | 12.32 UK qt) |
| Kerb Weight | 2241 kg (4940.56 lbs.) |
| Max. weight | 3130 kg (6900.47 lbs.) |
| Max load | 889 kg (1959.91 lbs.) |
| Trunk (boot) space – minimum | 1512 l (53.4 cu. ft.) |
| Fuel tank capacity | 98 l (25.89 US gal | 21.56 UK gal) |
| Permitted trailer load with brakes (12%) | 2676 kg (5899.57 lbs.) |
| Length | 5829 mm (229.49 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1884 mm (74.17 in.) |
| Wheelbase | 3645 mm (143.5 in.) |
| Front track | 1747 mm (68.78 in.) |
| Rear (Back) track | 1716 mm (67.56 in.) |
| Ride height (ground clearance) | 222 mm (8.74 in.) |
| Minimum turning circle (turning diameter) | 14.4 m (47.24 ft.) |
| Approach angle | 16.8° |
| Departure angle | 23.9° |
| Ramp-over (brakeover) angle | 19.2° |
| 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 fourth-generation GMC Sierra 1500, built on the GMTK2XX platform, represented a significant leap forward in terms of design, technology, and capability. Introduced for the 2014 model year, it shared its underpinnings with the Chevrolet Silverado. The 4.3L EcoTec3 V6 with the six-speed automatic transmission was positioned as the base engine option for the Crew Cab Short Box configuration. This combination aimed to provide a more fuel-efficient alternative to the 5.3L and 6.2L V8 engines, while still delivering adequate power and towing capacity for many truck buyers. The FlexFuel capability allowed operation on gasoline or a blend of up to 85% ethanol (E85).
Powertrain & Engine Architecture
The heart of this Sierra 1500 variant is the LV3 4.3L EcoTec3 V6 engine. This engine is a naturally aspirated, 60-degree V6 featuring aluminum cylinder heads and a cast iron block. A key feature of the EcoTec3 family was its direct injection system, which improved fuel efficiency and power output. The engine utilizes a variable valve timing (VVT) system to optimize performance across the rev range. The six-speed Hydra-Matic automatic transmission was specifically tuned to work with the characteristics of the 4.3L V6, providing smooth and efficient gear changes. The transmission featured a wide gear ratio spread, designed to balance acceleration and fuel economy. The cylinder deactivation system, a hallmark of the EcoTec3 engines, allowed the engine to operate on only four cylinders during light-load conditions, further enhancing fuel efficiency.
Driving Characteristics
The 4.3L V6-powered Sierra 1500 offered a noticeably different driving experience compared to its V8 siblings. While it didn’t possess the same raw acceleration, it provided sufficient power for everyday driving and moderate towing. The automatic transmission’s gear ratios were optimized for fuel economy, resulting in a more relaxed driving experience on the highway. Compared to the manual transmission options available on other Sierra 1500 trims, the automatic offered greater convenience, particularly in stop-and-go traffic. However, the automatic did slightly diminish overall fuel economy and responsiveness. The weight of the Crew Cab Short Box configuration, combined with the V6 engine, meant that the truck wasn’t as quick off the line as some competitors, but it remained a capable performer for its intended purpose.
Equipment & Trim Levels
The 4.3L V6 Sierra 1500 typically came standard with a relatively basic level of equipment, reflecting its position as the entry-level offering. Standard features generally included 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, leather upholstery, heated seats, and advanced safety technologies. Optional extras included a navigation system, a rearview camera, and various towing packages. Interior upholstery was typically cloth, with higher trims offering leather options. The dashboard configuration was consistent across the Sierra 1500 lineup, with a focus on functionality and ease of use.
Chassis & Braking
The Sierra 1500 IV utilized a fully boxed frame for enhanced rigidity and durability. The front suspension featured independent coil springs, providing a comfortable ride. The rear suspension employed a traditional leaf spring setup, designed to handle heavier loads. Braking duties were handled by ventilated disc brakes on all four wheels, with ABS (Anti-lock Braking System) as standard equipment. The rear brakes were slightly smaller in diameter compared to the front brakes. The steering system was a rack-and-pinion setup with electric power steering, offering responsive and precise handling. Tire sizes varied depending on the trim level, with 245/70 R17 and 265/70 R17 being common options.
Market Reception & Comparison
Critics generally praised the 4.3L EcoTec3 V6 for its fuel efficiency and adequate power, but some noted that it lacked the refinement and towing capacity of the V8 engines. The combination of the V6 and automatic transmission was seen as a good choice for buyers who prioritized fuel economy and convenience over outright performance. Compared to the 5.3L V8, the 4.3L offered better fuel economy but less power and towing capacity. The 6.2L V8 provided the highest levels of performance and capability, but at a significantly higher price point. Reliability reports for the 4.3L EcoTec3 engine have been generally positive, with few widespread issues reported.
Legacy
The 4.3L EcoTec3 V6-powered Sierra 1500 remains a relatively affordable and capable option in the used truck market. The engine has proven to be reasonably reliable, and parts availability is good. While it may not offer the same level of prestige as the V8-powered models, it provides a practical and economical choice for buyers seeking a full-size pickup truck. The GMTK2XX platform itself is known for its durability and overall quality, contributing to the Sierra 1500’s continued popularity in the used car market. The introduction of the EcoTec3 engine family marked a significant step forward in GMC’s efforts to improve fuel efficiency and reduce emissions in its full-size truck lineup.
