fact_checkQuick answer
2020 L5P Duramax Oil Capacity
Most 2020 L5P Duramax applications use 10 qt with a new oil filter. Check the table below to match your exact vehicle before filling.
With filter
10 qt
Recommended oil
dexosD / API CK-4 diesel oil where listed
Typical viscosity
15W-40 normal service; 5W-40 for cold service
Oil Capacity by Year and Application
All numbers below are with a new oil filter.
YearsApplicationWith filterLitersRecommended oil
2017-2026Silverado HD / Sierra HD with 6.6L Duramax L5P10 qt9.5 LdexosD / API CK-4 diesel oil where listed
Start a little below the listed amount, then use the dipstick to top off. Check the owner manual if your vehicle has a different chassis, duty rating, or special package.
Common Questions
How many quarts does a 2020 L5P Duramax take?
Most 2020 L5P Duramax applications take 10 qt with a new oil filter. Match your exact vehicle row before filling.
Does the 2020 L5P Duramax oil capacity include the filter?
Yes. The capacity shown here is the with-filter amount for a normal oil and filter change.
What oil should I use in a 2020 L5P Duramax?
2020 L5P Duramax applications commonly list 15W-40 normal service; 5W-40 for cold service. Use the recommended oil shown for your matching application and confirm it in the owner manual.
Why might my 2020 L5P Duramax use a different amount?
A different chassis, oil pan, duty rating, or special package can change the published refill amount. Use the row that matches your vehicle.