Duramax Oil Change (2017+ L5P 6.6L)
A Duramax oil change is the most important piece of maintenance to keep your truck running reliably. Using a easily accessible oil filter and oil pan drain plug, anybody can do the job. This guide is specific to the L5P 6.6L Duramax found in 2017, 2018, 2019, 2020, and 2021 Chevrolet Silverado / GMC Sierra 2500 / 3500 model years. To change the fuel filter, follow this guide.
Tools Needed:
- 16mm wrench or 16mm socket and ratchet
- Oil filter wrench or pliers
- Funnel for fresh engine oil
- Oil drain pan with at least 10 qt capacity
- Clean rag
Parts needed:
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- 10 quarts of 15W40 (conventional) or 5W40 (synthetic) engine oil
- Oil filter – ACDelco PF26
2017+ 6.6L L5P Duramax Oil Change Procedure:
- Park truck in a level spot and warm engine to operating temp
- Check engine oil level and condition on dipstick to verify no prior issues
- Loosen the drain plug using the 16mm wrench or the 16mm socket and ratchet and let the engine oil drain into the drain pan
- Move pan under oil filter to catch any oil that drips down
- Remove oil filter using the filter wrench or pliers
- Clean oil drain plug and oil filter mounting surfaces
- Lubricate the new oil filter O ring
- Install engine oil filter to oil filter housing
- Reinstall and tighten oil pan drain plug once all engine oil has fully drained
- Fill engine with 10 quarts of engine oil with oil fill funnel and reinstall oil fill cap
- Start engine to let oil circulate and oil pressure build
- Check for any leaks while it is running and shut engine back down
- Check engine oil level & top off if necessary
- Reset the oil maintenance reminder by following the prompts found on the gauge cluster
