GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Disconnect the mirror connector.
  2. Turn the ignition switch to the RUN position.
  3. Set the gear selector lever to the reverse position.
  4. Use a test light to probe between the inside rearview mirror connector terminal 3 and ground.

Does the test light illuminate?

--

Go to Step 2

Go to Step 3

2

  1. Disconnect the transaxle range switch connector C1.
  2. Use a test light to backprobe between the transaxle range switch connector C1 terminal B and ground.

Does the test light illuminate?

--

Go to Step 3

Go to Step 7

3

Inspect circuit 24.

Is there a poor connection or open in circuit 24?

--

Go to Step 5

Go to Step 6

4

Replace the inside rearview mirror. Refer to Inside Rearview Mirror Replacement for service procedure.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--

5

Repair the poor connection or open in circuit 24.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--

6

Replace or adjust the park neutral position (PNP) switch. Refer to Park/Neutral Position Switch Replacement or Park/Neutral Position Switch Replacement and Park/Neutral Position Switch Adjustment or Park/Neutral Position Switch Adjustment in transmission/ transaxle for service procedure.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--

7

Repair the poor connection or open in circuit 840.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--