CAR SPEC SHEET

2008 GMC TopKick Oil Capacity

2008 GMC TopKick oil capacity: 14.6 qt (6.6L V8 Engine) or 30.0 qt (7.2L L6 Caterpillar C7 Engine) with filter. From the owner's manual, PDF page 314.

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Depends on your engine. Choose yours, or compare them here.

  • 6.6L V8 Engine 14.6 qt with filter
  • 7.2L L6 Caterpillar C7 Engine 30.0 qt with filter

2008 GMC TopKick Owner's Manual, PDF page 314

6.6L V8 Engine 14.6 qtOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed

Oil capacity (with filter) · 6.6L V8 Engine · PDF page 314

6.6L V8 Engine 14.6 qt

Oil capacity (with filter) · 7.2L L6 Caterpillar C7 Engine · PDF page 314

7.2L L6 Caterpillar® C7 Engine 30.0 qt

See every quote (2 values)

All versions

2 values
Applies toValueManual saysPage
6.6L V8 Engine 14.6 qtwith filter “6.6L V8 Engine 14.6 qt” PDF page 314 ↗
7.2L L6 Caterpillar C7 Engine 30.0 qtwith filter “7.2L L6 Caterpillar® C7 Engine 30.0 qt” PDF page 314 ↗

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Check the level before you drive

  1. Park on level ground. Turn off the engine and follow the waiting period in your owner's manual.
  2. Pull, wipe, and reinsert the dipstick. Use a clean cloth, then push the dipstick all the way back in.
  3. Read the level between the marks. Pull it out again. The oil should sit between the upper and lower marks.
  4. 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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