GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the heated mirror operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms

2

Verify that the left heated mirror is inoperative.

Does the system operate normally?

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Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Disconnect the left heated mirror.
  2. Using a test lamp, probe between the left heated mirror battery feed circuit and ground.
  3. Operate the rear defog switch in the HVAC control module.

Does the test lamp light when the rear defogger is operated?

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Go to Step 4

Go to Step 5

4

Using a test lamp, probe between the left heated mirror ground circuit and B+.

Does the test lamp light ?

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Go to Step 6

Go to Step 7

5

Locate and repair a loose connection or an open in the left heated mirror battery feed circuit.

Is the repair complete?

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Go to Step 8

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6

Replace the left heated mirror. Refer to Power Mirror Replacement .

Is the repair complete?

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Go to Step 8

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7

Locate and repair a loose connection or an open in the left heated mirror ground circuit.

Is the repair complete?

Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3