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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1021 (Engine Mechanical - 8.1L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Oil Pan Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The oil pan must be installed within 5 minutes of the sealer being applied or the sealer will begin to cure, causing an inadequate seal.
  1. Apply sealant GM 2346286 (Canadian P/N 10953472), or equivalent to the sides of the front (2) and rear (1) crankshaft bearing caps, on both the left and right sides (4 locations total).
    2. Fig 1: View Of Sealant At Sides And Rear Crankshaft Bearing Caps
    GM843899Courtesy of GENERAL MOTORS CORP.
  2. Install a NEW oil pan gasket into the oil pan groove, if required.
  3. Install the oil pan.
    4. Fig 2: View Of Oil Pan
    GM843898Courtesy of GENERAL MOTORS CORP.
  4. Install the oil pan bolts.
    5. Fig 3: View Of Oil Pan
    GM843898Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Tighten the oil pan bolts.

    Tighten: 

    1. Tighten the bolts a first pass in sequence to 10 N.m (89 lb in).
    2. Tighten the bolts a final pass in sequence to 25 N.m (18 lb ft).

    6. Fig 4: View Of Oil Pan Bolt Tightening Sequence
    GM677869Courtesy of GENERAL MOTORS CORP.
  6. Position the battery cable channel into place.
  7. Install the battery cable channel bolt.

    Tighten:  Tighten the bolt to 9 N.m (80 lb in).

    8. Fig 5: View Of Battery Cable Channel Bolt
    GM1236368Courtesy of GENERAL MOTORS CORP.
  8. Install the oil level sensor to the oil pan.

    Tighten:  Tighten the sensor to 20 N.m (15 lb ft).

    9. Fig 6: View Of Oil Level Sensor
    GM750962Courtesy of GENERAL MOTORS CORP.
  9. Install the engine harness clip to the oil pan.
  10. Connect the oil level sensor electrical connector (4).
    11. Fig 7: View Of Oil Level Sensor Electrical Connector
    GM1236370Courtesy of GENERAL MOTORS CORP.
  11. Install the oil level indicator. Refer to Oil Level Indicator and Tube Replacement .
  12. Fill the engine with oil. Refer to Engine Oil and Oil Filter Replacement .
  13. If equipped with 4WD, install the crossbar.
  14. Install the crossbar bolts.

    Tighten:  Tighten the bolts to 100 N.m (74 lb ft).

    15. Fig 8: View Of Crossmember Bolts & Bar (4WD Only)
    GM487521Courtesy of GENERAL MOTORS CORP.
  15. If equipped with 2WD, install the crossbar.
  16. Install the crossbar bolts.

    Tighten:  Tighten the bolts to 100 N.m (74 lb ft).

    17. Fig 9: View Of Crossbar Bolts & Bar (2WD)
    GM328107Courtesy of GENERAL MOTORS CORP.
  17. Install the oil pan skid plate.
  18. Install the oil pan skid plate bolts.

    Tighten:  Tighten the bolts to 20 N.m (15 lb ft).

    19. Fig 10: Identifying Oil Pan Skid Plate
    GM309158Courtesy of GENERAL MOTORS CORP.
  19. Install the starter motor. Refer to Starter Motor Replacement (8.1L Engine) in Engine Electrical.
  20. Install the front differential, if equipped with 4WD. Refer to Differential Carrier Assembly Replacement in Front Drive Axle.
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