For 1990-2009 cars

### Removal Procedure

1. Disconnect the negative battery cable. Refer to

   Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

   in General Information.
2. Drain the coolant. Refer to Cooling System Draining and Filling .
3. Remove the intake air resonator chamber. Refer to Intake Air Resonator Replacement in Engine Controls.
4. Remove the front timing belt cover. Refer to Timing Belt Cover Replacement in Engine Mechanical.
5. Remove the water pump bolts.

Important: Use a catch basin to prevent the escaping coolant from contacting the timing belt.

6. Remove the water pump.
7. Clean the cylinder block sealing surfaces.

### Installation Procedure

1. Coat the seal ring of the water pump with silicone grease, GM P/N 12345579 or equivalent.
2. Install the water pump.

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 water pump bolts.

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

4. Install the water pump pulley.
5. Inspect timing belt for serviceability. Refer to Timing Belt Inspection in Engine Mechanical.
6. Install the front timing belt cover. Refer to Timing Belt Cover Replacement in Engine Mechanical.
7. Install the intake air resonator chamber. Refer to Intake Air Resonator Replacement in Engine Controls.
8. Refill the cooling system and bleed the cooling system. Refer to Cooling System Draining and Filling .
9. Reconnect the negative battery cable and reprogram the applicable accessories.