GM Service Manual Online
For 1990-2009 cars only
  1. Position an appropriate drain pan under the engine.
  2. Remove the oil pan drain bolt and allow oil to drain from the oil pan.

  3. Object Number: 236040  Size: SH
  4. Remove the oil filter.
  5. Remove coolant jacket drain plug and allow coolant to drain from the water jacket.
  6. Caution: Refer to Fastener Caution in the Preface section.

  7. Install oil pan drain bolt and the coolant jacket plug.
  8. • Tighten the bolt to 35 N·m (26 lb ft) .
    • Tighten the plug to 25 N·m (18 lb ft) .
  9. If cleaning or repairing the engine block, it is not necessary to reinstall the plugs.