General Motors 4.3L GM Engine — Changing the Engine Oil
Maintenance · Engine crankcase
For the General Motors 4.3L GM Engine, from the General Motors service manual.
Before you start
- Engine oil will be hot - use protective gloves; avoid skin contact.
Procedure
- Start engine and run until normal operating temperature is reached.
- Stop engine.
- Remove drain plug and allow oil to drain.
- Remove and discard oil filter and its sealing ring.
- Coat new filter sealing ring with clean engine oil, wipe mounting surface, tighten filter securely (do not over-tighten).
- Check drain plug sealing ring, reinstall plug and tighten to specification.
- Fill crankcase with oil.
- Start engine and check for oil leaks.
- Dispose of oil and filter safely.
Specs & values
- Always change the oil filter when changing engine oil; change oil when engine is warm
Source: General Motors service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.