GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1559856  Size: SH
  1. Remove the engine block valley cover bolts (506).
  2. Remove the valley cover (555) and gasket (556).

  3. Object Number: 1552536  Size: SH
  4. Remove the seals (537) from the cover.

  5. Object Number: 1408864  Size: SH
  6. Remove the engine oil pressure sensor (706) and seal (707), as required.