GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the power sunroof system check?

--

Go to Step 2

Go to Power Sunroof System Check

2

  1. Disconnect the sunroof control module connector.
  2. Test for a short to ground using a J 39200 between terminal 8 of the sunroof control module and ground.

Does the wire have a short to ground?

--

Go to Step 6

Go to Step 3

3

Test for a short to ground using a J 39200 between terminal 9 of the sunroof control module and ground.

Does the wire have a short to ground?

--

Go to Step 7

Go to Step 4

4

Test for continuity using a J 39200 between terminal 7 and ground while depressing the tilt switch to the Down position.

Does continuity exist?

--

Go to Step 5

Go to Step 11

5

Replace the sunroof control module.

Is the repair complete?

--

Go to Power Sunroof System Check

--

6

  1. Disconnect the sunroof actuator assembly connector. Refer to Sunroof Actuator Replacement for access.
  2. Test for a short to ground using a J 39200 between terminal 8 and ground.

Does the wire have a short to ground?

--

Go to Step 9

Go to Step 8

7

  1. Disconnect the sunroof actuator assembly connector. Refer to Sunroof Actuator Replacement for access.
  2. Test for a short to ground using a J 39200 between terminal 9 and ground.

Does continuity exist?

--

Go to Step 10

Go to Step 8

8

Replace the sunroof actuator assembly. Refer to Sunroof Actuator Replacement .

Is the repair complete?

--

Go to Power Sunroof System Check

--

9

Repair the open in the GRN/WHT wire between the control module connector terminal 8 and terminal 5 of the sunroof actuator. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--

10

Repair the open in the RED/BLU wire between the control module connector terminal 9 and terminal 6 of the sunroof actuator. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--

11

  1. Disconnect the sunroof switch assembly connector. Refer to Sunroof Switch Replacement for access.
  2. Test for continuity using a J 39200 between terminal 7 of the sunroof control module and terminal  2 of the sunroof switch assembly.

Does continuity exist?

--

Go to Step 12

Go to Step 13

12

Replace the sunroof switch assembly. Refer to Sunroof Switch Replacement .

Is the repair complete?

--

Go to Power Sunroof System Check

--

13

Repair the open in the RED/WHT wire between terminal 2 of the sunroof switch assembly and terminal 7 of the sunroof control module. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--