GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 Engine 🢒 Engine Controls and Fuel - 6.6L 🢒 Automatic Transmission Fluid and Filter Replacement

Removal Procedure

    Note: DO NOT drain the fluid if only the control main filter is being replaced.


    Object Number: 658982 Size: SH
  1. Remove drain plug (6) and drain plug seal (5). Drain the transmission fluid into a suitable container.

    2. Note: Use a standard strap-type filter wrench to remove the control main filter.

  2. Remove the filter (4) by rotating it in the counterclockwise direction.
  3. Remove the magnet (2) from the filter attachment tube (1) in the converter housing or from the top of the control main filter (3).
  4. Clean any metal debris from the magnet. Presence of any metal pieces larger than dust may indicate that transmission replacement or overhaul is required.

Installation Procedure

    Object Number: 658983 Size: SH
  1. Reinstall the magnet (2) onto the filter attachment tube (1) which is in the converter housing.
  2. Lubricate the gasket (3) on the control main filter with transmission fluid.
  3. Install, by hand, the control main filter (4) until the gasket on the control main filter touches the converter housing.

    4. Caution: Turning the control-main filter more than ONE FULL TURN after gasket contact will damage the filter and may cause fluid leakage.

  4. Turn the filter ONE FULL TURN ONLY after gasket contact.

    5. Caution: Refer to Fastener Caution in the Preface section.

  5. Reinstall the drain plug (6) and drain plug seal (5).

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

  6. Refill Transmission with DEXRON®III Automatic Transmission Fluid or Allison TransSynd™ Full Synthetic Fluid. Refer to Fluid Capacity Specifications.

    7. Note: DTC P0701 may often set following fluid service. Cycling the ignition clears the code and allows Drive or Reverse range to be attained.

  7. Cycle the ignition until Drive or Reverse range is attained.

    8. Note: Fluid remains in the external circuits and transmission cavities after draining the transmission.

  8. Check the transmission fluid level.