GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Express 🢒 Preface 🢒 Cautions and Notices 🢒 Transmission Fluid Filler Tube and Seal Replacement

Removal Procedure
  1. Remove the engine air cleaner. Refer to Air Cleaner Assembly Replacement in Engine Controls - 4.3L, Air Cleaner Assembly Replacement in Engine Controls - 6.5L or Air Cleaner Assembly Replacement in Engine Controls - 8.1L.
  2. Remove the transmission fluid level indicator from the fluid fill tube.
  3. Remove the engine cover. Refer to Engine Cover Removal? in Body and Accessories.

    4. Object Number: 104973 Size: SH
  4. For the 6.5L diesel engine remove the bolt and the nut securing the transmission fluid fill tube to the engine.

    5. Object Number: 104974 Size: SH
  5. For the 8.1L engine remove the nut securing the transmission fluid fill tube to the transmission stud.
  6. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  7. Support the vehicle with safety stands.
  8. Remove any dirt from the transmission where the fluid fill tube enters the transmission case.
  9. Remove the transmission fluid fill tube from the transmission. Pull the tube upward from the transmission.
  10. Remove the transmission fill tube seal.
  11. Clean the metal parts using solvent. Do not allow the solvent to enter the transmission.
  12. Air dry the parts.

Installation Procedure

    Object Number: 104974 Size: SH
  1. Install a new oil level indicator tube seal into the transmission case.
  2. Install the bottom of oil level indicator tube into the seal.
  3. Remove the safety stands.
  4. Lower the vehicle.

    5. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. For the 6.5L diesel engine, install the bolt and the nut securing the oil level indicator tube brackets to the engine.

    6. Tighten

        • Tighten the bolt to 47 N·m (35 lb ft).
        • Tighten the nut to 25 N·m (18 lb ft).
  6. For the 8.1 L gasoline engine, install the nut securing the oil level indicator tube to the transmission stud.

    7. Tighten
    Tighten the nut to 25 N·m (18 lb ft).

  7. Install the air cleaner. Refer to Air Cleaner Assembly Replacement in Engine Controls - 4.3L, Air Cleaner Assembly Replacement in Engine Controls - 6.5L or Air Cleaner Assembly Replacement in Engine Controls - 8.1L.
  8. Install the oil level indicator.
  9. Check the transmission fluid level. Refer to Transmission Fluid Check .