2004 GMC Sierra 2500HD Engine Overview
The 2004 GMC Sierra 2500HD is a robust heavy-duty truck that is well-regarded for its performance, especially when equipped with the 6.6L V8 diesel engine. This engine is part of the Duramax family and is known for its power, efficiency, and reliability. Below, we will delve into the detailed specifications of the 6.6L V8 diesel engine, its configuration, engine oil specifications, and recommended service intervals.
Engine Specifications
The following table outlines the key specifications of the 2004 GMC Sierra 2500HD’s 6.6L V8 diesel engine:
| Specification | Details |
|---|---|
| Engine Type | 6.6L V8 Turbocharged Diesel |
| Displacement | 6.6 liters (403 cubic inches) |
| Max Horsepower | 300 hp @ 3,000 RPM |
| Max Torque | 520 lb-ft @ 1,600 RPM |
| Fuel System | Direct Injection |
| Compression Ratio | 16.8:1 |
| Turbocharger | Yes, variable geometry |
| Transmission Options | Allison 1000 5-speed automatic |
| Fuel Tank Capacity | 34 gallons |
Engine Configuration
The 6.6L V8 diesel engine in the 2004 GMC Sierra 2500HD is designed for heavy-duty performance. Here are some key aspects of its configuration:
Engine Layout
– V8 configuration
– 90-degree angle between cylinder banks
– Cast iron block and aluminum cylinder heads
Valvetrain
– Overhead valve (OHV) design
– 4 valves per cylinder
– Chain-driven camshaft
Cooling System
– Water-cooled engine
– Integrated oil cooler
– Heavy-duty radiator
Engine Oil Specifications
Proper maintenance of engine oil is crucial for the longevity and performance of the 6.6L V8 diesel engine. Below are the recommended engine oil specifications:
Oil Type
– Recommended: SAE 15W-40 or 5W-40 synthetic diesel engine oil
Oil Capacity
– Total oil capacity: 10 quarts (with filter)
Oil Filter
– Use a high-quality oil filter compatible with diesel engines
Service Intervals
Regular maintenance is essential to keep the 2004 GMC Sierra 2500HD running smoothly. Below are the recommended service intervals for oil changes and other key maintenance tasks:
| Maintenance Task | Interval |
|---|---|
| Oil Change (conventional oil) | Every 3,000 to 5,000 miles |
| Oil Change (synthetic oil) | Every 7,500 to 10,000 miles |
| Fuel Filter Replacement | Every 15,000 miles |
| Air Filter Replacement | Every 30,000 miles |
| Coolant Flush | Every 50,000 miles |
| Transmission Fluid Change | Every 30,000 to 50,000 miles |
Conclusion
The 2004 GMC Sierra 2500HD equipped with the 6.6L V8 diesel engine is a powerful and reliable choice for those needing a heavy-duty truck. Understanding the engine specifications, configuration, oil requirements, and service intervals is essential for maintaining its performance and longevity. Regular maintenance will ensure that this robust engine continues to deliver the power and efficiency that drivers expect from a GMC heavy-duty truck.
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