The GMC Sierra 1500 V, specifically the Double Cab configuration powered by the 3.0 Duramax Turbo-Diesel engine producing 305 horsepower, represents a significant offering in the full-size pickup truck segment. Introduced with the GMTT1XX platform facelift in 2023, this variant caters to buyers seeking a balance of capability, fuel efficiency, and refined power. It slots into the Sierra 1500 lineup as a mid-range option, positioned between the base gasoline engines and the more powerful 6.2L V8, appealing to those prioritizing towing capacity and long-distance comfort over outright acceleration.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 V (GMTT1XX, facelift 2022) Double Cab |
| Type (Engine) | 3.0 Duramax TD (305 Hp) Automatic |
| Start of production | 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 9.8 l/100 km (24 US mpg) |
| Fuel consumption (extra urban) | 8.1 l/100 km (29 US mpg) |
| Fuel Type | Diesel |
| Weight-to-power ratio | 7.6 kg/Hp |
| Weight-to-torque ratio | 3.5 kg/Nm |
| Power | 305 Hp @ 3750 rpm |
| Power per litre | 101.7 Hp/l |
| Torque | 671 Nm @ 1500 rpm (494.9 lb.-ft. @ 1500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LZ0 |
| Engine displacement | 3000 cm3 (183.07 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.6 l (6.97 US qt | 5.81 UK qt) |
| Coolant capacity | 18.4 l (19.44 US qt | 16.19 UK qt) |
| Kerb Weight | 2318 kg (5110.32 lbs.) |
| Max. weight | 3116 kg (6869.6 lbs.) |
| Max load | 798 kg (1759.29 lbs.) |
| Fuel tank capacity | 83 l (21.93 US gal | 18.26 UK gal) |
| AdBlue tank capacity | 20.5 l (5.42 US gal | 4.51 UK gal) |
| Permitted trailer load with brakes (12%) | 4218 kg (9299.1 lbs.) |
| Length | 5891 mm (231.93 in.) |
| Width | 2063 mm (81.22 in.) |
| Height | 1920 mm (75.59 in.) |
| Wheelbase | 3745 mm (147.44 in.) |
| Ride height (ground clearance) | 200 mm (7.87 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 10 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 |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 255/70 R17; 265/70 R17; 265/65 R18 |
| Wheel rims size | 8J x 17; 8.5J x 18 |
INTRODUCTION
The 2023 GMC Sierra 1500 Double Cab with the 3.0L Duramax Turbo-Diesel engine and 10-speed automatic transmission represents GMC’s commitment to offering a diverse range of powertrain options within its popular full-size truck lineup. Built on the GMTT1XX platform, which received a significant refresh in 2022, this configuration aims to deliver a compelling combination of fuel efficiency, towing capability, and everyday usability. The Double Cab body style provides increased rear passenger space compared to the standard cab, making it suitable for families or crews. This particular diesel variant was introduced to appeal to customers who frequently tow or haul heavy loads, or those who simply desire the benefits of diesel’s inherent torque characteristics and improved fuel economy.
Powertrain & Engine Architecture
At the heart of this Sierra 1500 variant lies the LZ0 3.0-liter inline-six cylinder Duramax Turbo-Diesel engine. This engine utilizes a common-rail direct fuel injection system, delivering fuel at extremely high pressures for optimized combustion. The engine features a single variable geometry turbocharger (VGT) and an intercooler to enhance power and efficiency. The engine’s DOHC (Dual Overhead Camshaft) valvetrain, with four valves per cylinder, contributes to its smooth operation and broad torque curve. The 10-speed Hydra-Matic automatic transmission is specifically calibrated to work in harmony with the diesel engine’s characteristics, providing smooth and efficient gear changes. The transmission’s wide gear ratio spread allows for both strong acceleration and relaxed highway cruising. A particulate filter is included as standard to meet emissions regulations.
Driving Characteristics
The 305 horsepower and 671 lb-ft of torque produced by the 3.0L Duramax engine translate into impressive towing and hauling capabilities. While not as quick off the line as the gasoline-powered Sierra 1500 models, the diesel offers a substantial amount of low-end torque, making it ideal for tasks such as towing trailers, hauling heavy payloads, or navigating challenging terrain. The 10-speed automatic transmission helps to keep the engine in its optimal power band, providing responsive acceleration. The gear ratios are tuned for both efficiency and performance, with lower gears providing ample torque for towing and higher gears enabling relaxed highway cruising. Compared to the 5.3L or 6.2L V8 options, this diesel variant prioritizes torque delivery and fuel economy over outright horsepower.
Equipment & Trim Levels
The 3.0L Duramax Diesel Double Cab Sierra 1500 typically comes standard with a robust set of features. These generally include air conditioning, power windows and locks, a touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, and a rearview camera. Higher trim levels, such as the SLE, Elevation, and Denali, add features like leather upholstery, heated and ventilated seats, a premium sound system, and advanced safety technologies like adaptive cruise control and lane departure warning. Optional extras often include a sunroof, a bed liner, and various off-road packages. Interior upholstery typically consists of cloth on lower trims and leather on higher trims. Dashboard configurations vary depending on the trim level, with higher trims featuring more premium materials and finishes.
Chassis & Braking
The Sierra 1500 Double Cab utilizes an independent coil spring front suspension and a rigid axle suspension with leaf springs in the rear. This configuration provides a good balance of ride comfort and load-carrying capacity. The braking system consists of ventilated discs on all four wheels, with larger discs used in the front (330×30 mm) compared to the rear (345×20 mm). Anti-lock braking system (ABS) is standard. The chassis is designed to handle the increased weight and torque of the diesel engine, providing a stable and controlled driving experience. Steering is rack and pinion with electric power assist.
Market Reception & Comparison
The 3.0L Duramax Diesel Sierra 1500 has been generally well-received by critics and consumers alike. It’s praised for its fuel efficiency, particularly when compared to gasoline-powered trucks, and its impressive towing capacity. However, some reviewers have noted that the diesel engine can be somewhat noisy compared to gasoline engines. Compared to the 5.3L V8, the diesel offers better fuel economy and torque, but less horsepower. Compared to the 6.2L V8, the diesel provides comparable towing capacity but with significantly improved fuel efficiency. Reliability has been generally good, although diesel engines can be more complex and potentially more expensive to repair than gasoline engines.
Legacy
The LZ0 3.0L Duramax engine has proven to be a reliable and durable powertrain. In the used car market, Sierra 1500 models equipped with this engine and the 10-speed automatic transmission hold their value relatively well, particularly those with lower mileage and well-maintained service records. The combination of fuel efficiency, towing capability, and overall refinement makes this variant a desirable option for buyers seeking a capable and practical full-size pickup truck. As diesel technology continues to evolve, the 3.0L Duramax engine represents a significant step forward in providing a balance of performance, efficiency, and environmental responsibility.
