GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Is the inoperative mirror the LH outside rearview mirror?

--

Go to Step 2

Go to Step 6

2

  1. Disconnect the LH outside rearview mirror wiring harness connector.
  2. Using a test light, probe between B+ and LH outside rearview mirror harness connector (male side) terminal C.
  3. Set the outside mirror select switch to LH mirror.
  4. Press and hold the outside remote control rearview mirror switch to UP.

Did the test light illuminate?

--

Go to Step 7

Go to Step 3

3

Inspect for a poor connection or an open in circuit 89.

Is there a poor connection or an open in circuit 89?

--

Go to Step 4

Go to Step 5

4

Repair a poor connection or an open in circuit 89.

Is the repair complete and the system rechecked?

--

System Ok

--

5

Replace the outside remote control rearview mirror switch. Refer to Power Mirror Switch Replacement

Is the repair complete and the system rechecked?

--

System Ok

--

6

  1. Disconnect the RH outside rearview mirror wiring harness connector.
  2. Using a test light, probe between B+ and the RH outside rearview mirror harness connector (male side) terminal C.
  3. Set the outside mirror select switch to RH mirror.
  4. Press and hold the outside remote control rearview mirror switch to UP.

Did the test light illuminate?

--

Go to Step 7

Go to Step 8

7

Replace the mirror motor pack. Refer to Power Mirror Switch Replacement

Is the repair complete and the system rechecked?

--

System Ok

--

8

Inspect for a poor connection or an open in circuit 889.

Is there a poor connection or an open in circuit 889?

--

Go to Step 9

Go to Step 5

9

Repair a poor connection or an open in circuit 889.

Is the repair complete and the system rechecked?

--

System Ok

--