2021 Chevrolet Silverado 2500HD Oil Capacity & Filter Guide

The 2021 Chevrolet Silverado 2500HD requires 10.0 quarts (9.5 liters) of 0W-40 dexos2 full synthetic diesel engine oil for the 6.6L Duramax L5P V8 and 8.0 quarts (7.6 liters) of 0W-20 dexos1 Gen 2 full synthetic oil for the 6.6L L8T V8.

Quick Answer

• 6.6L Duramax L5P V8 Oil Capacity: 10.0 quarts (9.5 liters) with filter replacement.

• Recommended Oil Weight: 0W-40 or 5W-40 (above -20°F)

• Oil Specification: dexos2

• Oil Filter (OEM): ACDelco PF26

• Oil Filter (Aftermarket): Fram PH12060, Wix WL10255, Mobil 1 M1-210A

• 6.6L L8T V8 Oil Capacity: 8.0 quarts (7.6 liters) with filter replacement.

• Recommended Oil Weight: 0W-20

• Oil Specification: dexos1 Gen 2

• Oil Filter (OEM): ACDelco PF63

• Oil Filter (Aftermarket): Fram PH10575, Wix WL10255, Mobil 1 M1-212A

Capacity by Engine Option

Oil Change Interval

The 2021 Silverado 2500HD uses an oil life monitoring system to determine the appropriate oil change interval. However, for severe duty applications, such as frequent towing, hauling, or off-road use, it is recommended to change the oil every 5,000 miles. For normal duty, follow the oil life monitor, which will typically recommend an oil change every 7,500 miles.

Drain Plug Torque

The drain plug torque for the 2021 Silverado 2500HD is 18 lb-ft (25 Nm). It is recommended to use a new crush washer with each oil change to prevent leaks.

How to Change the Oil

1. Run the engine for a few minutes to warm up the oil.
2. Park the truck on a level surface and engage the parking brake.
3. Place a drain pan under the oil drain plug.
4. Remove the drain plug and allow the oil to drain completely.
5. Remove the old oil filter and clean the filter mating surface.
6. Apply a thin layer of new oil to the gasket of the new oil filter.
7. Install the new oil filter and tighten it by hand.
8. Reinstall the drain plug and tighten it to 18 lb-ft (25 Nm).
9. Fill the engine with the correct amount and type of new oil.
10. Start the engine and check for leaks.
11. Check the oil level and add more if necessary.
12. Reset the oil life monitor.

Common Issues / Tips

• The 6.6L Duramax L5P V8 has a two-piece oil pan, which can make it difficult to access the drain plug. A long-reach wrench or socket may be necessary.
• The 6.6L L8T V8 has a cartridge-style oil filter, which requires a special tool to remove.
• It is important to use the correct oil viscosity and specification to ensure proper engine lubrication and prevent damage.

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