GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Chevrolet C-Series Medium Duty Truck B7 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Oil Cooler Hose/Pipe Replacement

Removal Procedure

    Object Number: 787956 Size: SH
  1. Place a drain pan under the transmission oil cooler lines (1,2).
  2. Remove the oil cooler lines (1,2) from the transmission.

    3. Object Number: 787959 Size: SH
  3. Unclip and remove the oil cooler lines (1) from the retaining bracket (2).

    4. Object Number: 201563 Size: SH
  4. If servicing with the oil cooler filter on the left remove the bolts, the washers, and clips that secure the oil cooler lines.
  5. Remove the oil cooler lines from the transmission.

    6. Object Number: 201547 Size: SH
  6. If servicing with the oil cooler filter on the right remove the bolts, the washers, and clips that secure the oil cooler lines.
  7. Remove the oil cooler lines from the transmission.
  8. Remove the bolt securing the oil cooler line to the radiator.
  9. Remove the oil cooler lines from the radiator.
  10. Remove the oil cooler lines from the vehicle.

Installation Procedure

    Object Number: 201547 Size: SH
  1. Install the oil cooler lines to the vehicle.
  2. Install the oil cooler lines to the radiator.

    3. 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.

  3. Install the bolt securing the oil cooler line to the radiator.

    4. Tighten
    Tighten the oil cooler line bolt to 20 N·m (15 lb ft).

  4. If servicing with the oil cooler filter on the right install the oil cooler lines to the transmission.
  5. Install the bolts, the washers, and clips that secure the oil cooler lines.

    6. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).


    Object Number: 201563 Size: SH
  6. If servicing with the oil cooler filter on the left install the oil cooler lines to the transmission.
  7. Install the bolts, the washers, and clips that secure the oil cooler lines.

    8. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).


    Object Number: 787959 Size: SH
  8. Install the oil cooler lines (1) to the retaining bracket (2).

    9. Object Number: 787956 Size: SH
  9. Install the oil cooler lines (1,2) to the transmission.
  10. Check and fill the transmission to the proper level with DEXRON III fluid. Refer to Fluid Capacity Specifications .
  11. With the engine running, inspect the oil cooler lines for leaks.