GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 CTS 🢒 Engine 🢒 Engine Mechanical - 2.6L and 3.2L 🢒 Oil Pan Replacement

Removal Procedure
  1. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  2. Remove the front frame. Refer to Front Frame Replacement .

    3. Object Number: 785866 Size: SH
  3. Remove the bolt securing transmission fluid cooler pipes brace to the engine.
  4. Remove the 3 lower transmission mounting bolts.

    5. Object Number: 821103 Size: SH
  5. Remove the oil pan bolts.
  6. Carefully pry the oil pan away from the engine block.

    7. Remove the oil pan from the engine block.

  7. Clean the cylinder block mating surfaces.
  8. Clean and inspect the oil pan. Refer to Oil Pan Cleaning and Inspection .

Installation Procedure
  1. Apply a bead of silicone sealing compound, GM P/N 12346286 (Canadian P/N 10953472), or equivalent, to the oil pan mating surface.

    2. Object Number: 821103 Size: SH
  2. Position the oil pan to the engine block.

    3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 821104 Size: SH

    Important: Position the oil pan fully rearward while tightening.

  3. Install the oil pan bolts.

    4. Tighten
    Tighten the oil pan bolts in sequence to 15 N·m (11 lb ft).

  4. Install the 3 lower transmission mounting bolts.

    5. Tighten
    Tighten the transmission mounting bolts to 50 N·m (37 lb ft).


    Object Number: 785866 Size: SH
  5. Install the bolt securing transmission fluid cooler pipes brace to the engine.

    6. Tighten
    Tighten the transmission fluid cooler pipes brace bolt to 25 N·m (18 lb ft).

  6. Install the front frame. Refer to Front Frame Replacement .
  7. Fill the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  8. Inspect for oil leaks after engine start up.