GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the HVAC Blower Controls System Check performed?

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Go to Step 2

Go to HVAC System Check

2

  1. Move the blower speed selector switch to MEDIUM 2.
  2. Backprobe the blower speed selector switch connector with a test lamp from cavity 6 to chassis ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 3

3

Replace the blower speed selector switch. Refer to Blower Switch Replacement .

Is the repair complete?

--

Go to HVAC System Check

--

4

Backprobe the blower motor resistor connector with a test lamp from cavity 1 to chassis ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

5

Repair the open in the PNK/GRN wire between the blower speed selector switch and the blower motor resistor. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to HVAC System Check

--

6

Replace the blower motor resistor. Refer to Blower Motor Resistor Replacement

Is the repair complete?

--

Go to HVAC System Check

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