GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Defogger System Check performed

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Go to

Refer to Defogger System Check

2

Replace the heater-A/C control. For manual systems refer to Control Assembly Replacement and for automatic systems refer to Control Assembly Replacement in Instrument Panel Gauges and Console.

Is the repair complete?

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System OK

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