GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Heater Blower Controls System Check?

Go to Step 2

Go to Heater Blower Controls System Check

2

Test for an open in the WHT/BLK wire between the blower motor resistor and G203.

Is an open present?

Go to Step 4

Go to Step 3

3

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

Is the repair complete?

Go to Heater Blower Controls System Check

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4

Repair the open. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Heater Blower Controls System Check

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