Century, Grand Prix, Impala, Intrigue, Lumina, Monte Carlo, Regal 2001-2005

Oil Pan 2

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Removal & Installation



5.3L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the left engine mount strut and the bracket from the upper radiator support.

    Click image to see an enlarged view

    Fig. Assemble the J-28467-501 (2) to the J 28467-B cross bar (1)-5.3L engine

  6.  
  7. Assemble the J-28467-501 (2) to the J 28467-B cross bar (1).

    Click image to see an enlarged view

    Fig. Install the J 28467-B (1) and the J-28467-501 (2) to the fender rails-5.3L engine

  8.  
  9. Install the J 28467-B (1) and the J-28467-501 (2) to the fender rails.
  10.  
  11. Install the J 36462-A (1) to the cross bar (2).

    Click image to see an enlarged view

    Fig. Assembling lift hook-5.3L engine

  12.  
  13. Install the support lift hook (2) to the cross bar (1).
  14.  
  15. Install the support hook (1) to the right engine lift hook (3).
  16.  
  17. Install the support hook (1) to the J 36462-A (2).

    Click image to see an enlarged view

    Fig. Final assembly of support fixture-5.3L engine

  18.  
  19. Install the support hook (1) to the left engine lift hook (3).
  20.  
  21. Raise the engine to release the pressure off of the engine mounts.
  22.  
  23. Raise and support the vehicle.
  24.  
  25. Remove the front tires and wheels.
  26.  
  27. Remove and discard the 2 plastic braces from the front of the radiator lower air deflector. The plastic braces are directly below the front cradle bolts.
  28.  
  29. Remove the positive battery cable and the retainers from the frame and position aside.
  30.  
  31. Disconnect the power steering return hose from the frame.
  32.  
  33. Secure the power steering return hose.
  34.  
  35. Remove the stabilizer shaft links and rotate the stabilizer shaft upward to gain access to the mounting bolts in the power steering gear.
  36.  
  37. Remove the mounting bolts from the power steering gear.
  38.  
  39. Secure the power steering gear.
  40.  
  41. Remove the nuts that secure the engine mount to the frame.
  42.  
  43. Remove the nuts which secure the transaxle mount to the frame.
  44.  
  45. If applicable, disconnect the front wheel speed sensor harness connectors.
  46.  
  47. If applicable, disconnect the wheel speed sensor harness from the frame and lower control arms.
  48.  
  49. If applicable, remove the retainers at the front wheel speed harness from the frame and from the lower control arms.
  50.  
  51. Separate both of the lower ball joints from the steering knuckle.
  52.  
  53. Remove both front drivetrain reinforcements using the following procedure.
    1. Remove the drivetrain reinforcement to support brace bolts.
    2.  
    3. Remove the drivetrain reinforcement to front frame mounting stud nut.
    4.  
    5. Remove the drivetrain reinforcement from the vehicle.
    6.  

  54.  
  55. Lower the vehicle until the frame contacts the J 39580.
  56.  
  57. Remove the radiator to front frame brackets.

    Click image to see an enlarged view

    Fig. Remove the bolts which secure the front frame to the body-5.3L engine

  58.  
  59. Remove the bolts which secure the front frame to the body.

    Click image to see an enlarged view

    Fig. Remove the bolts which secure the rear frame to the body-5.3L engine

  60.  
  61. Remove the bolts which secure the rear frame to the body.
  62.  
  63. Raise the vehicle in order to separate the frame from the body.
  64.  
  65. Drain the engine oil and remove the engine oil filter.
  66.  
  67. Reinstall the drain plug and oil filter until snug.
  68.  
  69. Remove the transaxle converter cover bolt/stud and cover.
  70.  
  71. Disconnect the oil level sensor electrical connector.
  72.  
  73. Remove engine harness retainer from the front of oil pan.
  74.  
  75. Remove the oil pan bolts.
  76.  
  77. Remove the oil pan.
    NOTE
    DO NOT allow foreign material to enter the oil passages of the oil pan, cap or cover the openings as required.



    Click image to see an enlarged view

    Fig. Drill out the oil pan gasket retaining rivets-5.3L engine

  78.  
  79. Drill out the oil pan gasket retaining rivets, if required.
  80.  
  81. Remove the gasket from the pan.
  82.  
  83. Discard the gasket and rivets.
  84.  
  85. Clean and inspect the engine oil pan.
  86.  

To install:


NOTE
The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the transmission housing. To ensure the rigidity of the powertrain and correct transmission alignment, it is important that the rear of the block and the rear of the oil pan are flush, or even. The rear of the oil pan must NEVER protrude beyond the engine block and transmission housing plane. Do NOT reuse the oil pan gasket. It is NOT necessary to rivet the NEW gasket to the oil pan.

  1. Apply a 5 mm (0.20 in.) bead of sealant GM P/N 12346141 or 12378577 (Canadian P/N 89022195), or equivalent 20 mm (0.80 in.) long to the engine block. Apply the sealant directly onto the tabs of the front/rear cover gasket that protrudes into the oil pan surface.
    NOTE
    Be sure to align the oil gallery passages in the oil pan and engine block properly with the oil pan gasket.

  2.  
  3. Install the gasket onto the pan.
  4.  
  5. Install the oil pan bolts to the pan and through the gasket.
  6.  
  7. Install the oil pan, gasket, and bolts to the engine block. Tighten the oil pan and oil pan-to-front cover bolts to 18 ft. lbs. (25 Nm). Tighten the oil pan-to-rear cover bolts to 12 Nm (106 inch lbs.). Tighten the transmission housing, converter cover, and transmission bolts/stud to 37 ft. lbs. (50 Nm).
  8.  
  9. Install engine harness to front of oil pan.
  10.  
  11. Connect the oil level sensor electrical connector.
  12.  
  13. Install the transaxle converter cover and bolt/stud. Tighten the bolt/stud to 12 Nm (106 inch lbs.).
  14.  
  15. Install new engine oil and a new oil filter.
  16.  
  17. Position the engine support table with the frame under the vehicle.
  18.  
  19. Lower the vehicle to the frame.
  20.  
  21. Loosely install the bolts to secure the rear frame to the body.
  22.  
  23. Loosely install the bolts to secure the front frame to the body.
  24.  
  25. Align the frame to the body by inserting two 19 X 203 mm (0.74 X 8 in) pins in the alignment holes on the right side of the frame.
  26.  
  27. Install the front and rear frame bolts. Tighten the front bolts to 145 Nm (107 ft. lbs.). Tighten the rear bolts to 160 Nm (118 ft. lbs.).
  28.  
  29. Install the drivetrain reinforcements using the following procedure:
    1. Position the drivetrain reinforcements to the front frame mount stud to the support brace.
    2.  
    3. Loosely install the drivetrain reinforcement to support brace bolts.
    4.  
    5. Install the drivetrain reinforcement to cradle mount nut. Tighten the drivetrain reinforcement brace nut to 37 ft. lbs. (50 Nm). Tighten the drivetrain reinforcement brace bolts to 18 ft. lbs. (25 Nm).
    6.  

  30.  
  31. Install the radiator to front frame brackets.
  32.  
  33. Connect both the lower ball joints to the steering knuckle.
  34.  
  35. Install the nuts that secure the engine mount to the frame. Install the lower engine mount nuts. Tighten the nuts to 37 ft. lbs. (50 Nm).
  36.  
  37. Install the engine mount bracket bolts. Tighten the bolts to 37 ft. lbs. (50 Nm).
  38.  
  39. Install the nuts which secure the transaxle mount to the frame. Tighten the transaxle mount lower nuts to 47 Nm (35 ft. lbs.).
  40.  
  41. Install the steering gear mounting bolts.
  42.  
  43. Install the stabilizer shaft links.
  44.  
  45. If applicable, connect the wheel speed sensor wiring harness to the frame and lower control arm.
  46.  
  47. If applicable, connect the front wheel speed sensor connectors.
  48.  
  49. If applicable, install the front wheel speed harness retainers to the frame and to the lower control arm.
  50.  
  51. Install the positive battery cable and retainers to the frame.
  52.  
  53. Install the power steering cooler pipe.
  54.  
  55. Connect the fog lamp harness connectors.
  56.  
  57. Install the front tires and wheels.
  58.  
  59. Lower the vehicle.
  60.  
  61. Remove the engine support fixture.
  62.  
  63. Inspect the front wheel alignment.
  64.  

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the left engine mount strut and the bracket from the upper radiator support.

    Click image to see an enlarged view

    Fig. Assemble the J-28467-501 (2) to the J 28467-B cross bar (1)-5.3L engine

  6.  
  7. Assemble the J-28467-501 (2) to the J 28467-B cross bar (1).

    Click image to see an enlarged view

    Fig. Install the J 28467-B (1) and the J-28467-501 (2) to the fender rails-5.3L engine

  8.  
  9. Install the J 28467-B (1) and the J-28467-501 (2) to the fender rails.
  10.  
  11. Install the J 36462-A (1) to the cross bar (2).

    Click image to see an enlarged view

    Fig. Assembling lift hook-5.3L engine

  12.  
  13. Install the support lift hook (2) to the cross bar (1).
  14.  
  15. Install the support hook (1) to the right engine lift hook (3).
  16.  
  17. Install the support hook (1) to the J 36462-A (2).

    Click image to see an enlarged view

    Fig. Final assembly of support fixture-5.3L engine

  18.  
  19. Install the support hook (1) to the left engine lift hook (3).
  20.  
  21. Raise the engine to release the pressure off of the engine mounts.
  22.  
  23. Raise and support the vehicle.
  24.  
  25. Remove the front tires and wheels.
  26.  
  27. Remove and discard the 2 plastic braces from the front of the radiator lower air deflector. The plastic braces are directly below the front cradle bolts.
  28.  
  29. Remove the positive battery cable and the retainers from the frame and position aside.
  30.  
  31. Disconnect the power steering return hose from the frame.
  32.  
  33. Secure the power steering return hose.
  34.  
  35. Remove the stabilizer shaft links and rotate the stabilizer shaft upward to gain access to the mounting bolts in the power steering gear.
  36.  
  37. Remove the mounting bolts from the power steering gear.
  38.  
  39. Secure the power steering gear.
  40.  
  41. Remove the nuts that secure the engine mount to the frame.
  42.  
  43. Remove the nuts which secure the transaxle mount to the frame.
  44.  
  45. If applicable, disconnect the front wheel speed sensor harness connectors.
  46.  
  47. If applicable, disconnect the wheel speed sensor harness from the frame and lower control arms.
  48.  
  49. If applicable, remove the retainers at the front wheel speed harness from the frame and from the lower control arms.
  50.  
  51. Separate both of the lower ball joints from the steering knuckle.
  52.  
  53. Remove both front drivetrain reinforcements using the following procedure.
    1. Remove the drivetrain reinforcement to support brace bolts.
    2.  
    3. Remove the drivetrain reinforcement to front frame mounting stud nut.
    4.  
    5. Remove the drivetrain reinforcement from the vehicle.
    6.  

  54.  
  55. Lower the vehicle until the frame contacts the J 39580.
  56.  
  57. Remove the radiator to front frame brackets.

    Click image to see an enlarged view

    Fig. Remove the bolts which secure the front frame to the body-5.3L engine

  58.  
  59. Remove the bolts which secure the front frame to the body.

    Click image to see an enlarged view

    Fig. Remove the bolts which secure the rear frame to the body-5.3L engine

  60.  
  61. Remove the bolts which secure the rear frame to the body.
  62.  
  63. Raise the vehicle in order to separate the frame from the body.
  64.  
  65. Drain the engine oil and remove the engine oil filter.
  66.  
  67. Reinstall the drain plug and oil filter until snug.
  68.  
  69. Remove the transaxle converter cover bolt/stud and cover.
  70.  
  71. Disconnect the oil level sensor electrical connector.
  72.  
  73. Remove engine harness retainer from the front of oil pan.
  74.  
  75. Remove the oil pan bolts.
  76.  
  77. Remove the oil pan.
    NOTE
    DO NOT allow foreign material to enter the oil passages of the oil pan, cap or cover the openings as required.



    Click image to see an enlarged view

    Fig. Drill out the oil pan gasket retaining rivets-5.3L engine

  78.  
  79. Drill out the oil pan gasket retaining rivets, if required.
  80.  
  81. Remove the gasket from the pan.
  82.  
  83. Discard the gasket and rivets.
  84.  
  85. Clean and inspect the engine oil pan.
  86.  

To install:


NOTE
The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the transmission housing. To ensure the rigidity of the powertrain and correct transmission alignment, it is important that the rear of the block and the rear of the oil pan are flush, or even. The rear of the oil pan must NEVER protrude beyond the engine block and transmission housing plane. Do NOT reuse the oil pan gasket. It is NOT necessary to rivet the NEW gasket to the oil pan.

  1. Apply a 5 mm (0.20 in.) bead of sealant GM P/N 12346141 or 12378577 (Canadian P/N 89022195), or equivalent 20 mm (0.80 in.) long to the engine block. Apply the sealant directly onto the tabs of the front/rear cover gasket that protrudes into the oil pan surface.
    NOTE
    Be sure to align the oil gallery passages in the oil pan and engine block properly with the oil pan gasket.

  2.  
  3. Install the gasket onto the pan.
  4.  
  5. Install the oil pan bolts to the pan and through the gasket.
  6.  
  7. Install the oil pan, gasket, and bolts to the engine block. Tighten the oil pan and oil pan-to-front cover bolts to 18 ft. lbs. (25 Nm). Tighten the oil pan-to-rear cover bolts to 12 Nm (106 inch lbs.). Tighten the transmission housing, converter cover, and transmission bolts/stud to 37 ft. lbs. (50 Nm).
  8.  
  9. Install engine harness to front of oil pan.
  10.  
  11. Connect the oil level sensor electrical connector.
  12.  
  13. Install the transaxle converter cover and bolt/stud. Tighten the bolt/stud to 12 Nm (106 inch lbs.).
  14.  
  15. Install new engine oil and a new oil filter.
  16.  
  17. Position the engine support table with the frame under the vehicle.
  18.  
  19. Lower the vehicle to the frame.
  20.  
  21. Loosely install the bolts to secure the rear frame to the body.
  22.  
  23. Loosely install the bolts to secure the front frame to the body.
  24.  
  25. Align the frame to the body by inserting two 19 X 203 mm (0.74 X 8 in) pins in the alignment holes on the right side of the frame.
  26.  
  27. Install the front and rear frame bolts. Tighten the front bolts to 145 Nm (107 ft. lbs.). Tighten the rear bolts to 160 Nm (118 ft. lbs.).
  28.  
  29. Install the drivetrain reinforcements using the following procedure:
    1. Position the drivetrain reinforcements to the front frame mount stud to the support brace.
    2.  
    3. Loosely install the drivetrain reinforcement to support brace bolts.
    4.  
    5. Install the drivetrain reinforcement to cradle mount nut. Tighten the drivetrain reinforcement brace nut to 37 ft. lbs. (50 Nm). Tighten the drivetrain reinforcement brace bolts to 18 ft. lbs. (25 Nm).
    6.  

  30.  
  31. Install the radiator to front frame brackets.
  32.  
  33. Connect both the lower ball joints to the steering knuckle.
  34.  
  35. Install the nuts that secure the engine mount to the frame. Install the lower engine mount nuts. Tighten the nuts to 37 ft. lbs. (50 Nm).
  36.  
  37. Install the engine mount bracket bolts. Tighten the bolts to 37 ft. lbs. (50 Nm).
  38.  
  39. Install the nuts which secure the transaxle mount to the frame. Tighten the transaxle mount lower nuts to 47 Nm (35 ft. lbs.).
  40.  
  41. Install the steering gear mounting bolts.
  42.  
  43. Install the stabilizer shaft links.
  44.  
  45. If applicable, connect the wheel speed sensor wiring harness to the frame and lower control arm.
  46.  
  47. If applicable, connect the front wheel speed sensor connectors.
  48.  
  49. If applicable, install the front wheel speed harness retainers to the frame and to the lower control arm.
  50.  
  51. Install the positive battery cable and retainers to the frame.
  52.  
  53. Install the power steering cooler pipe.
  54.  
  55. Connect the fog lamp harness connectors.
  56.  
  57. Install the front tires and wheels.
  58.  
  59. Lower the vehicle.
  60.  
  61. Remove the engine support fixture.
  62.  
  63. Inspect the front wheel alignment.
  64.  

 
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