GM Service Manual Online
For 1990-2009 cars
Makes 🢒 Chevrolet 🢒 2004 🢒 C-Series Medium Duty Truck C6/7/8 - Mexico 🢒 Engine 🢒 Engine Electrical 🢒 Transmission Air Shift Harness Replacement

Removal Procedure

    Object Number: 791046 Size: SH
  1. Exhaust all air pressure from the system.
  2. Remove the screws from the transmission shift sheath.
  3. Slide the sheath down the shift lever.
  4. If equipped with the 9 speed transmission, disconnect the following tubes:
    5. • Red tube (1) from the "S" port
    • Black tube (2) from the "P" port

    Object Number: 791047 Size: SH
  5. If equipped with the 10 speed transmission, disconnect the following tubes:
    6. • Blue tube (1) from the "SP" port
    • Black tube (2) from the "P" port
    • Red tube (3) from the "S" port
    • Green tube (4) from the "H" port to "L" port
  6. Perform the following steps in order to remove the air shift control lever:
    7. 6.1. Loosen the shift knob lock nut.
    6.2. Unscrew the shift knob.
  7. Remove the shift lever sheath.

    8. Object Number: 791333 Size: SH
  8. Remove the control lever retainer bolts and retainer.
  9. Remove the boot retainer plate bolts and plate, if equipped.
  10. Remove the transmission boot bolts and boot.
  11. Raise and suitably support the vehicle, if required. Refer to Lifting and Jacking the Vehicle in General Information.

    12. Object Number: 791342 Size: SH
  12. If equipped with the 9 speed transmission, disconnect the following tubes:
    13. • Red tube (1) from the "S" port
    • Black tube (2) from the "P" port

    Object Number: 791343 Size: SH
  13. If equipped with the 10 speed transmission, disconnect the following tubes:
    14. • Green tube (1) from the "H" port to "L" port
    • Black tube (2) from the "P" port
    • Blue tube (3) from the "SP" port
    • Red tube (4) from the "S" port
  14. Remove the air shift harness from the vehicle.

Installation Procedure

    Object Number: 791343 Size: SH
  1. Install the air shift harness to the vehicle.
  2. If equipped with the 10 speed transmission, connect the following tubes:
    3. • Green tube (1) to the "H" port to "L" port
    • Black tube (2) to the "P" port
    • Blue tube (3) to the "SP" port
    • Red tube (4) to the "S" port

    Object Number: 791342 Size: SH
  3. If equipped with the 9 speed transmission, connect the following tubes:
    4. • Red tube (1) to the "S" port
    • Black tube (2) to the "P" port
  4. Lower the vehicle, if required.

    5. Object Number: 791333 Size: SH

    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. Install the transmission boot and bolts.

    6. Tighten
    Tighten the transmission boot bolts to 2 N·m (18 lb in).

  6. Install the boot retainer plate and bolts, if equipped.

    7. Tighten
    Tighten the transmission boot retainer plate bolts to 2 N·m (18 lb in).

  7. Install the control lever retainer and bolts.

    8. Tighten
    Tighten the transmission control lever retainer bolts to 2 N·m (18 lb in).


    Object Number: 791047 Size: SH
  8. Install the shift lever sheath.
  9. Perform the following steps in order to install the air shift control lever:
    10. 9.1. Screw the shift knob on completely, then back off until the knob or selector button points to the driver side of the cab.
    9.2. Tighten the shift knob lock nut against the shift knob.

    Tighten
    Tighten the shift knob lock nut to 25 N·m (18 lb ft).

  10. If equipped with the 10 speed transmission, connect the following tubes:
    11. • Blue tube (1) to the "SP" port
    • Black tube (2) to the "P" port
    • Red tube (3) to the "S" port
    • Green tube (4) to the "H" port to "L" port

    Object Number: 791046 Size: SH
  11. If equipped with the 9 speed transmission, connect the following tubes:
    12. • Red tube (1) to the "S" port
    • Black tube (2) to the "P" port
  12. Slide the sheath up the shift lever.
  13. Install the screws to the transmission shift sheath.

    14. Tighten
    Tighten the control lever sheath screws to 5 N·m (44 lb in).

  14. Pressurize the system.
  15. Operate the shift control valve to check for leaks.