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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1667 (Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L - Repair Instructions - On Vehicle) >> Crankshaft Rear Oil Seal Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Oil Seal
    GM1699207Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: For proper orientation, note the installation direction of the oil seal. The oil seal is a reverse-lip design. The part number is applied to the outside face of the seal, as shown.
  1. Inspect the seal and identify the part number markings for proper orientation.
    2. Fig 2: Installing Crankshaft Rear Oil Seal Using J 41479
    GM63200Courtesy of GENERAL MOTORS CORP.
  2. Install the J 41479  cone (2) and bolts onto the rear of the crankshaft. See Special Tools .
  3. Tighten the bolts until snug. Do not overtighten.
  4. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear seal bore. Install the oil seal with the part number markings facing away from the engine.
  5. Thread the J 41479  threaded rod into the tapered cone until the tool (1) contacts the oil seal. See Special Tools .
  6. Align the oil seal into the tool (1).
  7. Rotate the handle of the tool (1) clockwise until the seal enters the rear cover and bottoms into the cover bore.
  8. Remove the J 41479  . See Special Tools .
  9. Install the automatic transmission flexplate. refer to Automatic Transmission Flex Plate Replacement .
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