6.6 Duramax Oil Capacity by Year
Most Chevrolet Silverado HD and GMC Sierra HD trucks with the 6.6L Duramax diesel use 10.0 qt with filter. Viscosity guidance changes by generation and operating temperature. Use the table and finder below to match the exact year and application before refilling.
Typical fill
2001-2016
Range
with filter
Recommended oil
check owner manual
Capacity Finder
Check your year and truck series
Oil capacity with filter
Later L5P trucks still use the with-filter service amount, but oil approval language should be matched to the exact model-year manual.
Oil Capacity by Year and Application
All numbers below are with a new oil filter.
Who This Covers
This page is for Chevrolet Silverado HD / GMC Sierra HD with 6.6L Duramax, Chevrolet Silverado HD / GMC Sierra HD with 6.6L Duramax L5P and similar vehicles using the same engine family. Before adding oil, match the exact year and application in the table below.
Why Your Number May Differ
6.6 Duramax oil capacity is not always one fixed number. It can change by model year, vehicle setup, and oil-pan configuration, so use the row that matches your vehicle before refilling.
Common Questions
How many quarts does a 6.6 Duramax take?
6.6 Duramax takes 10 qt with a new oil filter. For many applications, 10 qt is the starting point for 2001-2016 Chevrolet Silverado HD / GMC Sierra HD with 6.6L Duramax.
Does 6.6 Duramax oil capacity include the filter?
Yes. The capacity values on this page include a new oil filter, which is the number normally used during a full oil change.
What oil does a 6.6 Duramax use?
6.6 Duramax commonly uses 15W-40 normal service; 5W-40 synthetic for cold service. Match the recommended oil shown for your exact row and confirm it against your owner manual or oil cap.
Why do 6.6 Duramax oil capacity numbers differ?
Oil capacity can change by model year, vehicle application, oil pan, emissions package, and whether the source is listing a with-filter service fill.
Browse by Year
More Ways to Check
Based on GM owner manual capacity tables for Silverado HD and Sierra HD Duramax diesel applications.. Check your owner manual before service to confirm the exact vehicle setup.