The 2004 GMC Sierra 1500 with a 5.3-liter V-8 is rated at 285 horsepower.
Engine overview and performance context
The 5.3-liter Vortec 5300 V-8 was GM’s popular small-block option for light-duty pickups in that era. In the 2004 Sierra 1500, it delivered 285 hp and about 325 lb-ft of torque, providing a balance of everyday drivability and towing capability. This horsepower rating reflects the stock configuration used across most trims, with minor variations possible due to drivetrain and manufacturing tolerances.
What this means for driving
With 285 horsepower, the Sierra 1500 could accelerate solidly for its class and manage highway merges and light towing tasks with relative ease. It wasn’t a high-performance sport truck, but it offered competent acceleration and reliable power for daily use and payloads.
Key specifications at a glance
Before reviewing the core figures, here is a concise snapshot of the engine setup and output.
- Engine: 5.3 L V8 (Vortec 5300)
- Horsepower: 285 hp
- Torque: 325 lb-ft
- Model year: 2004 GMC Sierra 1500
- Drivetrain options: 2WD or 4WD available
The horsepower figure remains the headline specification for this engine, with torque providing the practical pulling power for payloads and trailer work.