General Motors — Oil filter.

A General Motors service procedure — check it applies to your exact model before use.

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Procedure

1. Start the engine and run until it reaches normal operating temperature. IMPORTANT: Change oil when engine is warm from operation as it flows more freely, carrying away more impurities.
2. Stop engine. IMPORTANT: Engine oil will be hot. Use protective gloves to prevent burns. Engine oil contains chemicals which may be harmful to your health avoid skin contact.
3. Remove drain plug and allow the oil to drain.
4. Remove and discard oil filter and it sealing ring.
5. Coat sealing ring on the new filter with clean engine oil, wipe the sealing surface on the filter mounting surface to remove any dust, dirt or debris. Tighten filter securely (follow filter manufacturers instructions). Do not over- tighten.
6. Check sealing ring on drain plug for any damage, replace if necessary, wipe plug with clean rag, wipe pan sealing surface with clean rag and re-install plug into the pan. Tighten to specification.
7. Fill crankcase with oil.
8. Start engine and check for oil leaks.
9. Dispose of oil and filter in a safe manner. FUEL SYSTEM INSPECTION AND MAINTENANCE Overfilled crankcase (oil level being to high) can cause an oil leak, a flucua- tion or drop in the oil pressure and rocker arm “clatter” on engines. The overfill condition results in the engine crankshaft splashing and agitating the oil, causing it to foam (become aereated). The aereated oil causes the hydraulic lifters to “bleed down”. This results in rocker arm clatter and loss of engine performance due to valves not opening properly. CAUTION !

Source: manual:OM56041564 - GM Maintenance Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.