GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Riviera 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Draining Fluids and Oil Filter Removal

    Object Number: 203868 Size: SH
  1. Remove the oil drain plug.
  2. Drain the engine oil.
  3. Remove the oil filter.

    4. Object Number: 875115 Size: SH
  4. Remove the knock sensor.
  5. Drain the coolant.