For 1990-2009 cars

### Removal Procedure

1. Remove air cleaner and duct assembly. Refer to Air Cleaner Element Replacement in Engine Controls - 3.4L.
2. Drain the coolant. Refer to Cooling System Draining and Filling .
3. Loosen the engine mount strut-to-engine mount strut bracket bolts. Refer to Engine Mount Strut Bracket Replacement .
4. Remove the engine mount strut bracket brace bolts from the upper radiator support and reposition the struts and brackets rearward. Refer to Engine Mount Strut Bracket Replacement in Engine Mechanical - 3.4L.
5. Remove the cooling fans. Refer to Engine Cooling Fan Replacement .
6. Remove the radiator upper hose from the radiator. Refer to Radiator Inlet Hose Replacement .
7. Remove the radiator lower hose from the radiator. Refer to Radiator Outlet Hose Replacement .
8. Remove the low coolant module. Refer to Coolant Level Module Replacement .
9. Disconnect the transaxle oil cooler lines from the radiator. Refer to Automatic Transmission Oil Cooler Pipes Replacement in Automatic Transaxle 4T65-E.
10. Remove the radiator brackets and bolts.
11. Remove the radiator.

### Installation Procedure

1. Install the radiator.

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.

2. Install the radiator brackets and bolts.

Tighten
Tighten the bolts to 24 N·m (18 lb ft).

3. Connect the transaxle oil cooler lines to the radiator. Refer to Automatic Transmission Oil Cooler Pipes Replacement in Automatic Transaxle 4T65-E.
4. Install the low coolant module. Refer to Coolant Level Module Replacement .
5. Install the radiator upper hose to the radiator. Refer to Radiator Inlet Hose Replacement .
6. Install the radiator lower hose to the radiator. Refer to Radiator Outlet Hose Replacement .
7. Install the cooling fans. Refer to Engine Cooling Fan Replacement .
8. Reposition and install the engine mount strut bracket brace bolts to the upper radiator support. Refer to Engine Mount Strut Bracket Replacement in Engine Mechanical - 3.4L.
9. Tighten the engine mount strut-to-engine mount strut bracket bolts. Refer to Engine Mount Strut Bracket Replacement .

NOTICE: When adding coolant, it is important that you use GM Goodwrench DEX-COOL® or HAVOLINE® DEX-COOL® coolant. If Coolant other than DEX-COOL® or HAVOLINE® DEX-COOL® is added to the system the engine coolant will require change sooner; at 50 000 km (30,000 mi) or 24 months.

10. Fill the cooling system. Refer to Cooling System Draining and Filling .
11. Install the air cleaner and duct assembly. Refer to Air Cleaner Element Replacement in Engine Controls - 3.4L.