GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: This diagnostic chart should only be used if the temperature display is operational.

1

Has the Automatic Day-Night Mirrors System Check been performed?

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Go to Step 2

Go to Automatic Day-Night Mirrors System Check

2

  1. Turn ignition to ON position.
  2. Toggle mirror switch to compass position.

Is the mirror display totally blank?

--

Go to Step 6

Go to Step 3

3

Is the letter C displayed on mirror?

--

Go to Step 4

Go to Step 5

4

Refer to compass calibration procedure in the owners manual and perform the procedure.

Is the compass operating properly and accurate?

--

Go to Automatic Day-Night Mirrors System Check

Go to Step 5

5

Refer to Compass Variance procedure in the Owners Manual and perform the procedure.

Is the compass operating properly and accurate?

--

Go to Automatic Day-Night Mirrors System Check

Go to Step 6

6

  1. Replace the automatic day-night mirror with compass. Refer to Inside Rearview Mirror Replacement .
  2. Perform compass calibration and compass variance procedures as outlined in the owners manual.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

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