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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1613 (Automatic Transmission - ALLISON - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Oil Pan Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis 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: Drain Plug, Drain Plug Seal, Filter & Oil Pan
    GM658981Courtesy of GENERAL MOTORS CORP.
  1. Remove all gasket material from the transmission case. Remove any scratches from the transmission case that would cause a split-line leak.
  2. Place a new seal (1) on the tube of the transmission internal oil filter (2), if the filter was removed. Be sure the seal locates against the shoulder on the internal oil filter tube.
  3. Push the filter (2) and seal (1) into the seal bore in the transmission case. Position the transmission internal oil filter properly.
  4. Install 2 headless guide bolts (9), M8 x 1.25, into opposite corners of the oil pan mounting face on the transmission case.
  5. Place a gasket (3) on the oil pan and align the bolt holes.
  6. Slide the gasket (3) and oil pan (5) over the guide bolts and hold them in place while installing 2 bolts (8) to hold the parts in place.
    7. CAUTION: Refer to Fastener Caution .
  7. Remove the guide bolts.
  8. Install the 10 remaining oil pan bolts (8).

    Tighten:  Tighten the bolts to 27 N.m (20 lb ft).

  9. Install the drain plug (7) and drain plug seal (6).

    Tighten:  Tighten the drain plug to 35 N.m (26 lb ft).

  10. Lower the vehicle.
    11. CAUTION: Use only clean and approved transmission fluid.
  11. Refill the transmission with DEXRON®VI Automatic Transmission Fluid. Refer to Fluid Capacity Specifications .
    12. NOTE: Remember fluid remains in the external circuits and transmission cavities after draining the transmission.
  12. Check the transmission fluid level. Refer to Transmission Fluid Level and Condition Check .
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