GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

Vehicles not equipped with air conditioning have 1 fan motor. Vehicles equipped with air conditioning have 2 fan motors. For vehicles equipped with air conditioning refer to HVAC System Check in HVAC Systems with A/C-Manual.

1

Start the engine and run until the engine coolant temperature reaches 93°C (199°F)

    • The fan motor runs once the engine coolant temperature reaches 93°C (199°F).
    • The fan motor stops running when the engine coolant temperature drops below 83° C (181° F).

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.