2021 GMC Sierra Denali 2500HD/3500HD Oil capacity
8.0qt
With filter · all (gas engine)
2021 GMC Sierra Denali 2500HD/3500HD Owner's Manual, PDF page 405
Engine Oil with Filter 7.6 L 8.0 qtOpen the manual at this page ↗Added Oct 15, 2026
See where it's printed
Oil capacity (with filter) · All (gas engine) · PDF page 405
Engine Oil with Filter 7.6 L 8.0 qt
See every quote (1 value)
As printed in the manual
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| All (gas engine) | 8.0 qtwith filter | “Engine Oil with Filter 7.6 L 8.0 qt” | PDF page 405 ↗ |
Scroll the table to see the quote and page →
Check the level before you drive
- Park on level ground. Turn off the engine and follow the waiting period in your owner's manual.
- Pull, wipe, and reinsert the dipstick. Use a clean cloth, then push the dipstick all the way back in.
- Read the level between the marks. Pull it out again. The oil should sit between the upper and lower marks.
- Top up a little at a time, then recheck. Use the specified oil. Don't fill above the upper mark.
A quick level check, not a full oil-change guide. Follow your manual's procedure.
Confirm with your own manual, dipstick or door-jamb label.
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