General Motors 4.3L GM Engine — Checking/Filling Engine Oil Level
Maintenance · Engine crankcase
For the General Motors 4.3L GM Engine, from the General Motors service manual.
Before you start
- An overfilled crankcase can cause an oil leak or a fluctuation/drop in oil pressure.
Procedure
- Stop engine and allow approximately five minutes for oil to drain back into the oil pan.
- Remove dipstick, wipe clean, and reinstall fully into the dipstick tube.
- Remove dipstick and note oil level; it must be between the FULL and ADD marks.
- If below ADD, remove the oil filler cap from the valve cover.
- Add required oil up to but not over the FULL mark.
- Reinstall oil filler cap and wipe excess oil clean.
Specs & values
- Oil level between ADD and FULL marks
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.