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How much horsepower does a 2004 Chevy Avalanche 5.3 have?

A 2004 Chevy Avalanche with the 5.3-liter V8 is rated at 285 horsepower. This figure comes from GM's official SAE net horsepower specification for the 5.3L Vortec 5300 engine used in the Avalanche 1500 lineup for that year.

Engine specifications and horsepower

The 2004 Avalanche uses GM’s 5.3-liter Vortec 5300 V8 (LM7), a family of iron-block, pushrod engines known for their broad torque range and durability. Here are the key specs that define its horsepower output in the Avalanche 1500 model:

Displacement: 5.3 L (5,328 cc)

Configuration: V8, OHV, 16 valves

Horsepower: 285 hp (SAE net)

Torque: 325 lb-ft (441 Nm)

Fuel system: Sequential multi-point fuel injection

Transmission: 4-speed automatic transmission (GM 4L60-E) commonly paired with the 5.3L in 2004 Avalanches

Drivetrain: Available in 2WD and 4WD configurations

These specifications capture the official rating for the 2004 Avalanche 1500 with the 5.3-liter V8. Variations can occur due to production tolerances, exhaust configurations, or model-specific options, but 285 hp is the standard figure for this year and setup.

Performance and driving impressions

With 285 horsepower and 325 lb-ft of torque, the 5.3L V8 provides respectable acceleration for a full-size pickup/SUV of its era, along with strong mid-range power useful for towing and carrying heavy loads. Real-world performance will feel influenced by the vehicle’s weight, drivetrain (2WD vs. 4WD), and the transmission’s gear ratios. In everyday use, the power is typically described as solid and usable rather than sporty.

Drivetrain considerations

Owners choosing 4WD versions or heavier configurations may experience slightly different throttle response and acceleration due to weight and transfer-case mechanics, but the horsepower rating remains the same. Efficiency and feel can also be influenced by maintenance, fuel quality, and any aftermarket exhaust or intake changes.

Summary

In summary, the 2004 Chevy Avalanche with the 5.3-liter V8 is rated at 285 horsepower (SAE net) and 325 lb-ft of torque, the standard specification for that model year’s Avalanche 1500. This power level reflects the general performance expectations of the vehicle—adequate acceleration, strong mid-range torque, and solid towing capability for its class. Always verify your specific vehicle’s window sticker or VIN documentation for any minor, model-year variations.

Notes

For historical context, GM’s Vortec 5300 family spanned several years with similar ratings in the early 2000s. If you’re comparing between model years or nearby trims, the 5.3L V8 in the 2003–2004 Avalanches is typically documented at 285 hp with 325 lb-ft of torque, and changes in later years may reflect refinements or different emissions controls.

What year is the Avalanche to stay away from?

Years to be cautious with include the 2003 (transmission problems), 2005 (3-4 clutch failure), and models with the Active Fuel Management (AFM) system, which was introduced around 2007. The 2011 and 2013 models also have notable recall issues.

This video discusses common problems with the Chevrolet Avalanche, including issues with the AFM system: 49sCCV TVYouTube · Apr 2, 2019
Years with significant issues

2003: Has a history of significant transmission problems, which can range from shifting issues to complete failure.
2005: Particularly prone to 3-4 clutch failure, which can leave the transmission stuck in second gear.
2011: Subject to recalls for rear axle cross pins that were improperly heat-treated, potentially leading to fracture and displacement.
2013: Has recalls for issues with the park lock cable or steering column lock actuator gear.

Other considerations

2007-2013 (Second Generation): This generation introduced the AFM system, which can lead to engine misfires, rough idling, and eventual engine damage if not properly maintained.
Pre-2007: The engine in the first generation (2002-2006) is generally considered more durable, though the transmission may require more maintenance, and the plastic body cladding can fade and degrade over time.
Rust: Regardless of the year, be cautious with models from rust-prone areas. The Avalanche's bed is also not watertight and tends to leak.

How to choose

If engine longevity is a priority, consider the 2002-2006 models without AFM, but be prepared for potential transmission work.
If you prefer a more modern vehicle, look for a model year that avoids the specific problems listed above. Even though the 2011 and 2013 models have specific recalls, they are generally considered reliable after the issues are addressed.

How much is a 2004 Avalanche worth today?

The value of a used 2004 Chevrolet Avalanche ranges from $1,844 to $5,721, based on vehicle condition, mileage, and options.

How much horsepower does a 2004 Chevy Silverado 1500 5.3 L V8 have?

The 2004 Chevy 1500 with the 5.3L engine has two main horsepower ratings: 295 hp for the Crew Cab and certain other configurations, and 285 hp for the Extended Cab and other models. Both versions produce 330 lb-ft of torque and use the Vortec 5300 V8 engine.

Engine Configuration	Horsepower	Torque
Crew Cab & some other models	295 hp @ 5200 RPM	330 lb-ft @ 4000 RPM
Extended Cab & other models	285 hp @ 5200 RPM	325 lb-ft @ 4000 RPM

How much horsepower does a 2004 Chevy Avalanche Z71 have?

Engines

Year	Engine	Power
2002–2003	5.3L Vortec 5300 V8	285 hp (213 kW) @ 5200 RPM
2004–2005	295 hp (220 kW) @ 5200 RPM
2006	295 hp (220 kW) @ 5200 RPM
2002–2003	8.1L Vortec 8100 V8	340 hp (254 kW) @ 4200 RPM

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.