2025 Chevrolet Silverado 3500HD Oil Capacity & Filter Guide

The 2025 Chevrolet Silverado 3500HD takes 6.0 quarts (5.7 liters) of 0W-20 engine oil for the 6.6L L8T gasoline engine, and 10.0 quarts (9.5 liters) of 15W-40 or 5W-40 engine oil for the 6.6L L5P Duramax diesel engine.

Quick answer

6.6L L8T Gasoline Engine:

• Oil Capacity: 6.0 quarts (5.7 liters)
• Recommended Oil Weight: SAE 0W-20
• Oil Specification: Dexos1 Gen3
• OEM Oil Filter: Consult dealer
• Wix Oil Filter: Consult aftermarket catalog
• Fram Oil Filter: Consult aftermarket catalog

6.6L L5P Duramax Diesel Engine:

• Oil Capacity: 10.0 quarts (9.5 liters)
• Recommended Oil Weight: SAE 15W-40 (preferred) or SAE 5W-40 (for cold weather)
• Oil Specification: API CK-4 or API FA-4 (consult owner's manual for specific application and backward compatibility)
• OEM Oil Filter: Consult dealer
• Wix Oil Filter: Consult aftermarket catalog
• Fram Oil Filter: Consult aftermarket catalog

Capacity by engine option

Oil change interval

6.6L L8T Gasoline Engine:

• Normal Duty: The Engine Oil Life System (OLS) will indicate when an oil change is due, typically up to 7,500 miles or 12 months, whichever comes first. Always follow the OLS.
• Severe Duty: If you frequently tow heavy loads, drive in extreme temperatures, or idle for extended periods, the OLS may recommend an oil change sooner. Adhere to the OLS recommendation.

6.6L L5P Duramax Diesel Engine:

• Normal Duty: The Engine Oil Life System (OLS) will signal when an oil change is necessary, generally up to 7,500-10,000 miles or 12 months, whichever comes first. Always rely on the OLS.
• Severe Duty: For vehicles regularly used for heavy towing, plowing, or in dusty/dirty environments, the OLS will likely recommend more frequent oil changes. Follow the OLS.

Drain plug torque

6.6L L8T Gasoline Engine:

• Drain Plug Torque: Consult your owner's manual or a service manual for the precise torque specification. Typically, it is around 25 Nm (18 lb-ft) to 30 Nm (22 lb-ft).
• Crush Washer: Always use a new crush washer with each oil change to ensure a proper seal and prevent leaks.

6.6L L5P Duramax Diesel Engine:

• Drain Plug Torque: Consult your owner's manual or a service manual for the precise torque specification. It is generally higher than the gasoline engine, often in the range of 30-40 Nm (22-30 lb-ft).
• Crush Washer: A new crush washer is essential for a leak-free seal. Always replace it during every oil change.

How to change the oil

1. Gather Supplies: Ensure you have the correct oil, oil filter, drain pan, wrench, torque wrench, and a new crush washer.
2. Warm the Engine (Optional but Recommended): Run the engine for a few minutes to warm the oil, allowing it to drain more easily.
3. Lift and Secure: Safely lift the front of the truck with a jack and secure it with jack stands.
4. Locate and Loosen Drain Plug: Position your drain pan under the oil pan. Using the correct size wrench, carefully loosen and remove the drain plug.
5. Drain Oil: Allow the old oil to completely drain into the pan. This may take several minutes.
6. Replace Drain Plug: Once drained, install the new crush washer on the drain plug and re-install it, tightening to the manufacturer's specified torque.
7. Remove Old Filter: Loosen and remove the old oil filter. Be prepared for some oil to spill.
8. Install New Filter: Apply a thin layer of new oil to the gasket of the new filter. Screw it on hand-tight, then turn another 3/4 to 1 full turn (or as per filter instructions).
9. Fill with New Oil: Carefully pour the recommended amount and type of new oil into the engine's oil fill cap.
10. Check Level & Inspect for Leaks: Start the engine and run it for a minute. Shut it off, let it sit for a few minutes, then check the oil level with the dipstick. Add more oil if necessary. Check under the truck for any leaks.
11. Reset Oil Life Monitor: Follow the instructions in your owner's manual to reset the Engine Oil Life System.

Common issues / tips

• L5P Duramax Fuel Filter: Remember that the L5P Duramax also has a separate fuel filter that requires regular replacement. Consult your owner's manual for its service interval.
• DEF System (Diesel Exhaust Fluid): For L5P owners, stay vigilant with your Diesel Exhaust Fluid levels and ensure you use the correct DEF. Low or incorrect DEF can lead to derated engine power.
• Proper Disposal: Always dispose of used engine oil and filters responsibly at an authorized recycling center.
• Consult Owner's Manual: The information provided here is a general guide. For the most accurate and up-to-date specifications and procedures, always refer to your 2025 Chevrolet Silverado 3500HD owner's manual.

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