GM Service Manual Online
For 1990-2009 cars only

Problem

Action

Faulty coolant hoses

Replace the hoses as needed.

Faulty coolant hose clamps

Replace the clamps as needed and torque to specs.

Loose coolant drain plugs

Tighten the coolant drain plugs.

Leaking radiator core

Repair the radiator core as necessary.

Leaking gaskets

Replace the gaskets as necessary.

Faulty radiator cap

Replace the radiator cap.

Missing radiator shroud or baffles

Install the correct radiator shroud or baffles.

Water pump leaks

Replace the water pump.

Faulty surge tank

Repair or replace the surge tank.

Heater hoses leak

Repair or replace the heater hoses.

Heater core leaks

Repair or replace the heater core as necessary.

Leaking head gasket

Replace the head gasket as necessary.

Loose radiator drain cock

Tighten the radiator drain cock as necessary.