GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 GMC C Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Transmission Fluid Cooler Hose/Pipe Replacement

Removal Procedure
  1. Remove the radiator grille. Refer to Grille Replacement.

    2. Object Number: 2043688 Size: SH
  2. Remove the transmission fluid cooler hose from the auxiliary oil cooler (2). Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.

    3. Object Number: 2043693 Size: SH
  3. Remove the transmission fluid cooler hose from the radiator (1). Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.
  4. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
  5. Remove the engine protection shield. Refer to Engine Protection Shield Replacement.

    6. Object Number: 2043690 Size: SH
  6. Remove the cooling lines from the transmission (1). Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.
  7. Remove the oil cooling lines from the vehicle.

Installation Procedure

    Object Number: 2043690 Size: SH
  1. Install the transmission oil cooler lines to the vehicle.
  2. Install the cooling lines to the transmission (1). Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.
  3. Install the engine protection shield. Refer to Engine Protection Shield Replacement.
  4. Lower the vehicle.

    5. Object Number: 2043693 Size: SH
  5. Install the transmission fluid cooler hose to the radiator (1). Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.

    6. Object Number: 2043688 Size: SH
  6. Install the transmission fluid cooler hose to the auxiliary oil cooler (1). Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.
  7. Install the radiator grille. Refer to Grille Replacement.