General Motors — Checking Oil Level
Maintenance · Engine oil
From a General Motors operator's manual covering: 181 CID, 3.0L L4, GMG-430, LW6. Check it applies to your exact model before use.
Applies to: General Motors 3.0L L4 (181 CID) engine
Procedure
- Pull out dipstick, wipe clean and reinsert fully, then withdraw. Oil level should be between marks.
- If level is at or below lower mark, top with oil immediately, preferably up to upper mark.
- For sight gauge, oil level should be about 1 1/2 inches down from top of glass when at maximum; verify with dipstick.
Source: General Motors operator's 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.