The GMC Sierra 1500 V, specifically the Double Cab configuration with the 3.0 Duramax Turbo-Diesel engine producing 305 horsepower and paired with a 10-speed automatic transmission and four-wheel drive, represents a significant offering in the full-size pickup truck segment. Introduced for the 2023 model year as part of the GMTT1XX platform’s facelift, this variant aims to balance capability, fuel efficiency, and refinement for the American truck buyer. It slots into the Sierra 1500 lineup as a mid-range option, appealing to customers who desire diesel torque and towing capacity without opting for the higher trims and associated costs.
Technical Specifications
| Brand | GMC |
| Model | Sierra 1500 |
| Generation | Sierra 1500 V (GMTT1XX, facelift 2022) Double Cab |
| Type (Engine) | 3.0 Duramax TD (305 Hp) 4WD Automatic |
| Start of production | 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 10.7 l/100 km (22 US mpg) |
| Fuel consumption (extra urban) | 8.7 l/100 km (27 US mpg) |
| Fuel Type | Diesel |
| Weight-to-power ratio | 7.9 kg/Hp |
| Weight-to-torque ratio | 3.6 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 | 2413 kg (5319.75 lbs.) |
| Max. weight | 3193 kg (7039.36 lbs.) |
| Max load | 780 kg (1719.61 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%) | 4127 kg (9098.48 lbs.) |
| Length | 5891 mm (231.93 in.) |
| Width | 2063 mm (81.22 in.) |
| Height | 1921 mm (75.63 in.) |
| Wheelbase | 3745 mm (147.44 in.) |
| Ride height (ground clearance) | 205 mm (8.07 in.) |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives rear wheels, front wheels engaged via clutch. |
| 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 |
| Tires size | 255/70 R17; 265/70 R17; 265/65 R18 |
| Wheel rims size | 8J x 17; 8.5J x 18 |
Powertrain & Engine Architecture
The heart of this Sierra 1500 variant is the LZ0 3.0-liter inline-six cylinder Duramax turbo-diesel engine. This engine represents a departure from the traditional V8 engines often associated with American trucks, offering a more efficient alternative. The engine utilizes a common-rail direct fuel injection system, delivering fuel directly into the cylinders at extremely high pressure for optimized combustion. A variable geometry turbocharger with an intercooler further enhances performance and efficiency. The engine features a Double Overhead Camshaft (DOHC) valvetrain, contributing to improved breathing and power delivery. The 10-speed Hydra-Matic automatic transmission is a key component, providing a wide range of gear ratios to optimize both fuel economy and towing performance. This transmission is known for its smooth shifts and responsiveness.
Driving Characteristics
The 305 horsepower and 671 lb-ft of torque produced by the Duramax engine provide ample power for everyday driving and demanding tasks. While not as overtly powerful as some of the larger gasoline V8 options available in the Sierra 1500 lineup, the diesel engine delivers its torque in a broad, usable band, making it particularly well-suited for towing and hauling. The 10-speed automatic transmission helps to keep the engine in its optimal power range, providing smooth acceleration. Compared to manual transmission equipped Sierra 1500s, the automatic offers convenience and ease of use, especially in stop-and-go traffic. The four-wheel drive system provides enhanced traction in various conditions, making it a capable off-road vehicle as well.
Equipment & Trim Levels
The Double Cab 3.0 Duramax TD 4WD Automatic trim typically includes standard features such as a user-friendly infotainment system with Apple CarPlay and Android Auto compatibility, a rearview camera, and a suite of driver-assistance technologies like automatic emergency braking and lane departure warning. Interior upholstery is generally cloth, with options for leather upgrades available. Common optional extras include a larger touchscreen display, a premium sound system, heated and ventilated front seats, and a power-adjustable driver’s seat. The Double Cab configuration offers a spacious cabin with comfortable seating for five passengers.
Chassis & Braking
The Sierra 1500 utilizes a body-on-frame construction, providing a robust and durable platform. The front suspension features independent coil springs, while the rear suspension employs a traditional leaf spring setup. This configuration balances ride comfort with load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. The front brakes measure 330x30mm, while the rear brakes are 345x20mm. An Anti-lock Braking System (ABS) is standard, enhancing safety and control during emergency braking situations.
Market Reception & Comparison
The 3.0 Duramax diesel engine has been generally well-received by critics and consumers alike. It offers a compelling alternative to gasoline engines, providing improved fuel economy and impressive towing capabilities. Compared to the 5.3L and 6.2L V8 gasoline engines available in the Sierra 1500, the Duramax diesel delivers better fuel economy, particularly in highway driving. However, the diesel engine typically comes with a higher initial cost. Reliability has been generally good, although diesel engines can be more complex and potentially more expensive to repair than gasoline engines. The 10-speed automatic transmission has also proven to be reliable and smooth-shifting.
Legacy
The 3.0 Duramax engine represents a significant step forward in diesel technology for GMC. Its combination of power, efficiency, and refinement has made it a popular choice among truck buyers. In the used car market, Sierra 1500s equipped with this powertrain tend to hold their value well, due to their reputation for reliability and capability. The Duramax engine’s longevity and durability suggest that these trucks will continue to provide years of dependable service, making them a solid investment for those seeking a capable and efficient full-size pickup.
