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Home >> Chevrolet >> 2014 >> Express 1500 LS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L (L20), 5.3L (LMF), Or 6.0L (L96 LC8) - Repair Instructions - On Vehicle >> Repair Instructions - On Vehicle >> Oil Pan Replacement >> Installation Procedure

Installation Procedure

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 bellhousing. 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 must NEVER protrude beyond the engine block and transmission bellhousing plane.
  • Do not reuse the oil pan gasket.
  • It is not necessary to rivet the NEW gasket to the oil pan.
    Fig 1: View Of Sealant Applied To Front Oil Pan-To-Engine Block Junction
    GM451897Courtesy of GENERAL MOTORS COMPANY
  1. Apply a 5 mm (0.20 in) bead of sealant 20 mm (0.80 in) long to the engine block. Refer to Adhesives, Fluids, Lubricants and Sealers for the correct part number. Apply the sealant directly onto the tabs of the front cover gasket that protrudes into the oil pan surface.
    2. Fig 2: View Of Sealant Applied To Rear Oil Pan-To-Engine Block Junction
    GM451898Courtesy of GENERAL MOTORS COMPANY
  2. Apply a 5 mm (0.20 in) bead of sealant 20 mm (0.8 in) long to the engine block. Refer to Adhesives, Fluids, Lubricants and Sealers for the correct part number. Apply the sealant directly onto the tabs of the rear cover gasket that protrudes into the oil pan surface.
    3. Fig 3: View Of Oil Pan & Bolts
    GM683355Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Be sure to align the oil gallery passages in the oil pan and engine block properly with the oil pan gasket.

  3. Pre-assemble the oil pan gasket to the pan.
    • Install the gasket onto the pan (2).
    • Install the oil pan bolts (1) to the pan and through the gasket.
  4. Install the oil pan, gasket and bolts to the engine block.
  5. Tighten the oil pan bolts until snug. Do not overtighten.
    6. Fig 4: View Of Transmission Converter Cover Bolt (4L80-E)
    GM396795Courtesy of GENERAL MOTORS COMPANY
  6. Install the transmission converter cover bolts until snug, if equipped with the 4L80-E automatic transmission.
    7. Fig 5: Identifying Stud & Bolt Securing Transmission To Engine (Right Side)
    GM394448Courtesy of GENERAL MOTORS COMPANY
  7. Install the transmission bolt and stud on the right side until snug, If equipped with the 4L60-E automatic transmission.
    8. Fig 6: Identifying Six Studs & One Bolt Securing Transmission To Engine
    GM394446Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  8. Install the bottom bolt on the left side until snug.
    1. Tighten the oil pan-to-front cover bolts to 25 N.m (18 lb ft).
    2. Tighten the oil pan-to-rear cover bolts to 12 N.m (106 lb in).
    3. Tighten the converter cover and transmission bolts/stud to 50 N.m (37 lb ft).
    9. Fig 7: View Of Positive Battery Cable Clip & Bolt
    GM310672Courtesy of GENERAL MOTORS COMPANY
  9. Install the positive battery cable clip bolt (1) and tighten to 9 N.m (80 lb in).
    10. Fig 8: View Of Positive Battery Cable, Channel & Bolt
    GM662508Courtesy of GENERAL MOTORS COMPANY
  10. Slide the channel pin into the oil pan tab.
  11. Install the battery cable channel bolt and tighten to 12 N.m (106 lb in).
    12. Fig 9: Identifying Electrical Connector (Right Side Of Engine)
    GM662991Courtesy of GENERAL MOTORS COMPANY
  12. Connect the oil level sensor electrical connector (6).
    13. Fig 10: View Of Transmission Cover & Bolt
    GM832978Courtesy of GENERAL MOTORS COMPANY
  13. Install the transmission cover and bolt and tighten to 12 N.m (106 lb in).
    14. Fig 11: View Of Crossbar Bolts & Bar (2WD)
    GM328107Courtesy of GENERAL MOTORS COMPANY
  14. Install the crossbar (2).
  15. Install the crossbar bolts (1) and tighten to 100 N.m (74 lb ft).
    16. Fig 12: View Of Transmission Cover Bolt
    GM663487Courtesy of GENERAL MOTORS COMPANY
  16. Install the transmission cover bolt and tighten to 12 N.m (106 lb in).
    17. Fig 13: View Of Differential Carrier Upper Mounting Bolt
    GM834276Courtesy of GENERAL MOTORS COMPANY
  17. Raise the front drive axle into position.
  18. If equipped with AWD, install the differential carrier upper mounting bolt and nut until snug. Do not tighten at this time.
    19. Fig 14: View Of Differential Carrier Lower Mounting Bolt
    GM834278Courtesy of GENERAL MOTORS COMPANY
  19. If equipped with AWD, install the differential carrier lower mounting bolt and nut and tighten to 100 N.m (75 lb ft).
    20. Fig 15: View Of Inner Axle Housing Nuts
    GM834241Courtesy of GENERAL MOTORS COMPANY
  20. If equipped with AWD, install the inner axle housing washers and nuts to the bracket and tighten to 100 N.m (75 lb ft).
  21. Remove the jack from the front drive axle.
  22. Install new engine oil and a new oil filter. Refer to Engine Oil and Oil Filter Replacement .
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