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Home >> GMC >> 1999 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 4.3L V6, 5.0L, 5.7L & 7.4L V8 - VINS [W,X,M,R,J]) >> Removal & Installation >> Oil Pan >> 4.3L "C" & "K" Series >> Removal

4.3L "C" & "K" Series: Removal

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the battery negative cable. Remove the oil level indicator. Raise the vehicle.
  2. Remove the engine oil and the engine oil filter. Remove the oil filter adapter. Refer to OIL FILTER ADAPTER .
    Fig 1: Identifying Oil Drain Plug
    GM188048Courtesy of GENERAL MOTORS COMPANY
  3. Remove the starter motor. Remove the transmission cover.
    Fig 2: Transmission Starter Cover
    GM391868Courtesy of GENERAL MOTORS COMPANY
  4. Remove the oil cooler pipes and the retainer from the side of the engine.
    Fig 3: Starter Positive Cable Bracket And Transmission Cooler Lines Bracket
    GM327996Courtesy of GENERAL MOTORS COMPANY
  5. Remove the transmission. Refer to REMOVAL & INSTALLATION ("C" & "K" SERIES) .
  6. Remove the engine flywheel.
  7. Remove the access plugs for the oil pan rear nuts. Remove the oil pan nuts and bolts.
    • Remove the ten oil pan bolts.
    • Remove the two nuts at the crankshaft rear oil seal.
    • Remove the transmission to oil pan bolts.
    Fig 4: Expanded View Of Oil Pan Rear Nuts Access Plugs
    GM331034Courtesy of GENERAL MOTORS COMPANY
  8. Remove the engine oil pan and the oil pan gasket.

    Clean all sealing surfaces.

    Fig 5: Removing Oil Pan & Gasket
    G01688488Courtesy of GENERAL MOTORS CORP.
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