For 1990-2009 cars only
- Use a hammer and a punch in order to install the vent assembly (37), if necessary.
- Apply sealant GM P/N 12345382 to the oil pressure test hole plug (38).
- Install the oil pressure test hole plug (38) and tighten to 12 N·m (106 lb in).
Caution: Refer to Fastener Caution in the Preface section.
