GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire HVAC Blower Controls System Check performed?

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Go to Step 2

Go to HVAC Blower Controls System Check

2

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the blower resistor.
  3. Connect a test light at the blower resistor connector terminal B and ground.
  4. Turn the ignition switch to the RUN position.
  5. Turn the blower switch to LO.
  6. Turn the selector switch to the VENT position.

Does the test light illuminate?

--

Go to Step 3

Go to Step 4

3

Replace the blower resistor. Refer to Blower Motor Resistor Replacement

Is the repair complete?

--

Go to Step 7

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4

Connect a test light at the HVAC control selector switch connector C1 terminal A and ground.

Does the test light illuminate?

--

Go to Step 5

Go to Step 6

5

Repair a poor connection or open in circuit 60.

Is the repair complete?

--

Go to Step 7

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6

Replace the HVAC control selector switch. Refer to Control Assembly Replacement

Is the repair complete?

--

Go to Step 7

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7

  1. Turn the ignition switch to the OFF position.
  2. Reconnect all connectors/components removed.

Have all the repairs been made?

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Go to HVAC Blower Controls System Check

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