Sierra 1500 2WD V6-4.3L (2008)
Transmission Cooler: Service and Repair
6L50/6L80/6L90 - Automatic Transmission
Transmission Fluid Auxiliary Cooler Replacement
Removal Procedure
1. Remove the front grill assembly. Refer to Radiator Grille Replacement (Chevrolet) Radiator Grille Replacement (GMC) .
2. Place a drain pan under the vehicle.
3. Disconnect the transmission oil cooler lines from the auxiliary cooler. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting
Disconnection and Connection (See: Fluid Line/Hose/Service and Repair) .
4. Remove the auxiliary oil cooler bolts (1) and push pins (2).
5. Remove the auxiliary oil cooler from the vehicle.
Installation Procedure
1. Install the auxiliary oil cooler to the vehicle.
Notice: Refer to Fastener Notice .
2. Install the bolts (1) and the push pins (2) that retain the auxiliary oil cooler to the radiator brace.
Tighten the bolts to 12 N.m (9 lb ft).
3. Connect the transmission oil cooler lines to the auxiliary cooler. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting
Disconnection and Connection (See: Fluid Line/Hose/Service and Repair) .
4. Install the front grill assembly. Refer to Radiator Grille Replacement (Chevrolet) Radiator Grille Replacement (GMC) .
