We're is the water pump on 2003 Pontiac Aztec.

Water Pump Replacement

Removal Procedure

Drain the cooling system until the coolant is below the level of the water pump.
Remove the drive belt guard.
Loosen the water pump pulley bolts.
Remove the drive belt.

Remove the water pump pulley bolts.
Remove the water pump pulley.

Remove the water pump bolts.
Remove the water pump.
Remove the water pump gasket.
Clean the water pump mating surfaces.
Installation Procedure

Install the water pump gasket.
Install the water pump
Notice: Refer to Fastener Notice in Service Precautions.

Install the water pump bolts. Tighten the bolts to 10 Nm (89 inch lbs.).

Install the water pump pulley.
Install the water pump pulley bolts.
Install the drive belt. Tighten the water pump pulley bolts to 25 Nm (18 inch lbs.).

Install the drive belt guard.
Fill the cooling system.