GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Astro - 4WD 🢒 Engine 🢒 Engine Electrical 🢒 Transmission Fluid Cooler Hose/Pipe Replacement

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    2. Object Number: 103670 Size: SH
  2. Remove the oil cooler lines from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  3. Remove the oil cooler lines from the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  4. Remove the oil cooler lines from the mounting bracket.
  5. Remove the cooler lines from the vehicle.

Installation Procedure
  1. Install the transmission oil cooler line to the vehicle.
  2. Install the oil cooler lines to the mounting bracket.

    3. Important: 

       • Do not reuse any of the existing oil lines or oil line fittings if there is any excessive corrosion.
       • Do not reuse any of the existing retaining rings that were removed from the existing quick connect fittings. All retaining rings being installed must be new.


    Object Number: 103670 Size: SH
  3. Connect the oil cooler lines to the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  4. Connect the oil cooler lines to the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  5. Lower the vehicle.