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 blend of capability, technology, and refinement aimed at a broad spectrum of truck buyers. Within the Sierra 1500 lineup, the Regular Cab Standard Box configuration with the 5.3-liter EcoTec3 V8 engine and six-speed automatic transmission occupied a middle ground, providing a balance between work-ready functionality and everyday usability. This variant was positioned as a step up from the base models, offering increased power and features without reaching the price point of the more luxurious trims like the Denali.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 IV (GMTK2XX) Regular Cab Standard Box |
| Type (Engine) | 5.3 EcoTec3 V6 (355/380 Hp) Automatic FlexFuel |
| Start of production | 2013 year |
| End of production | 2015 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 3 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel consumption (economy) – extra urban | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel Type | Petrol / Ethanol – E85 |
| Weight-to-power ratio | 5.8 kg/Hp, 173.8 Hp/tonne |
| Weight-to-torque ratio | 3.9 kg/Nm, 254.2 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 | 2042 kg (4501.84 lbs.) |
| Max. weight | 2994 kg (6600.64 lbs.) |
| Max load | 952 kg (2098.8 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%) | 4218 kg (9299.1 lbs.) |
| Length | 5221 mm (205.55 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 | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| 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 |
Powertrain & Engine Architecture
The heart of this Sierra 1500 variant is the 5.3-liter L83 EcoTec3 V8 engine. This engine is a naturally aspirated, direct-injected powerplant featuring Active Fuel Management (cylinder deactivation) to improve fuel economy. The L83 utilizes a robust cast iron block with aluminum cylinder heads. Direct injection allows for precise fuel delivery, enhancing both power and efficiency. The valvetrain employs an overhead valve (OHV) configuration, a traditional design favored for its simplicity and durability. The engine produces 355 horsepower at 5600 rpm and 382 lb-ft of torque at 4100 rpm. When running on E85 fuel, output increases to 380 horsepower and 433 lb-ft of torque. The engine is mated to a six-speed Hydra-Matic automatic transmission, known for its smooth shifting and reliability. This transmission is electronically controlled, adapting to driving conditions and driver input.
Driving Characteristics
The 5.3L V8 and six-speed automatic combination provided a comfortable and capable driving experience. While not as quick as the 6.2L V8 option, the 5.3L offered ample power for everyday driving and towing. The automatic transmission’s gear ratios were tuned for a balance of acceleration and fuel efficiency. The transmission generally shifted smoothly, although some drivers noted a slight hesitation during downshifts. The Regular Cab configuration, being lighter than extended or crew cab models, contributed to slightly improved acceleration and handling. The rear-wheel-drive setup provided a traditional truck feel, with predictable handling characteristics. Compared to manual transmission versions, the automatic offered greater convenience, particularly in stop-and-go traffic.
Equipment & Trim Levels
The Regular Cab Standard Box 5.3L Sierra 1500 typically came standard with features like air conditioning, power windows and locks, a basic audio system, and vinyl upholstery. The standard box offered a practical cargo bed length for hauling. Optional extras included upgraded audio systems, a navigation system, leather upholstery, power-adjustable seats, and various convenience packages. The interior design was functional and durable, prioritizing practicality over luxury. The dashboard layout was straightforward, with easy-to-read gauges and intuitive controls.
Chassis & Braking
The Sierra 1500 IV utilized a fully boxed frame for enhanced strength and rigidity. The front suspension featured independent coil springs, providing a comfortable ride. The rear suspension employed a traditional leaf spring setup, designed to handle heavy loads. Braking duties were handled by ventilated disc brakes at all four corners, with ABS included as standard equipment. The rear brakes were slightly smaller in diameter than the front brakes. Steering was rack-and-pinion with electric power assist, offering responsive and precise control.
Market Reception & Comparison
The 5.3L V8-equipped Sierra 1500 was well-received by critics and consumers alike. It was praised for its strong engine performance, comfortable ride, and overall value. Fuel economy was considered adequate for a full-size pickup, especially with the benefit of Active Fuel Management. Compared to the 4.3L V6, the 5.3L offered a significant power upgrade. Compared to the 6.2L V8, it provided a more affordable option with slightly lower running costs. Reliability was generally good, although some owners reported minor issues with the direct injection system.
Legacy
The GMTK2XX Sierra 1500, particularly the 5.3L V8 variants, have proven to be durable and reliable trucks. On the used car market, these trucks remain popular choices for buyers seeking a capable and affordable full-size pickup. The L83 EcoTec3 engine, while not without its quirks, has generally demonstrated good long-term durability. Regular maintenance, including oil changes and fuel system cleaning, is crucial for ensuring the longevity of these powertrains. The combination of capability, comfort, and value has cemented the Sierra 1500 IV’s place as a well-regarded truck in its segment.
