GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Sliding Door Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the power Door System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

Attempt to open the power sliding door using both OPEN/CLOSE switches and the remote keyless entry transmitter.

Does the power sliding door open using any of the OPEN/CLOSE switches?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Does the sliding door alarm sound a tone when an OPEN/CLOSE switch is pressed?

Go to Step 8

Go to Step 4

4

  1. Enter the on-board diagnostic mode 3. Refer to On-Board Diagnostic Features .
  2. Open the power sliding door.
  3. Connect a test lamp from the unlatch actuator control circuit contact on the B-pillar door lock switch plate to ground.
  4. Press a power sliding door OPEN/CLOSE switch.

Does the test lamp flash when the OPEN/CLOSE switch is pressed?

Go to Step 5

Go to Step 7

5

Inspect the door lock switch plate for the following conditions:

    • Proper door plunger operation.
    • Clean electrical contact from the door plungers to the B-pillar contacts.
    • Proper alignment of the door plungers to the B-pillar contacts.

Did you find and correct the condition?

Go to Step 18

Go to Step 6

6

Test the unlatch actuator control and ground circuits from the door lock switch plate plungers to the unlatch actuator connector for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 14

7

Test the unlatch actuator control circuit from the B-pillar door lock switch plate pads to the rear side door actuator control module connector for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 16

8

  1. Disconnect the transaxle range switch connector C1.
  2. Connect a test lamp from the battery positive voltage supply circuit terminal to ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 10

9

  1. Connect a fused jumper wire from the battery positive supply circuit terminal to the park signal circuit terminal in the transaxle range switch harness connector.
  2. Attempt to open the power sliding door using an OPEN/CLOSE switch.

Does the power sliding door open properly?

Go to Step 12

Go to Step 11

10

Repair the battery positive voltage supply circuit to the transaxle range switch for an open or high resistance. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Step 18

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11

Test the park signal circuit to the rear side door actuator control module for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 16

12

Inspect for poor connections at the transaxle range switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 13

13

Replace the transaxle range switch. Refer to Park/Neutral Position Switch Replacement in Automatic Transaxle.

Is the repair complete?

Go to Step 18

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14

Inspect for poor connections at the unlatch actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 15

15

Replace the unlatch actuator. Refer to Power Sliding Door Unlatch Actuator Replacement .

Is the repair complete?

Go to Step 18

--

16

Inspect for poor connections at the rear side door actuator control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 17

17

Replace the rear side door actuator control module. Refer to Rear Side Door Actuator Control Module Replacement .

Is the repair complete?

Go to Step 18

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18

Re-initialize the power sliding door and operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3