GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the heater-A/C Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check

2

Replace the blower motor control module. Refer to Blower Motor Control Module Replacement .

Is the repair complete?

--

Go to Step 3

--

3

Verify that the system operates properly.

Does the system operate properly?

--

System OK

Go to Symptoms