GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Door Locks System Check?

--

Go to Step 2

Go to Power Door Locks System Check

2

Is the door LOCK/UNLOCK function inoperative only when using the key lock cylinder switch?

--

Go to Power Door Locks Key Lock Switch Inoperative - One

Go to Step 3

3

Do all of the doors not LOCK/UNLOCK?

--

Go to Step 34

Go to Step 4

4

Does the Left front door LOCK/UNLOCK?

--

Go to Step 5

Go to Step 9

5

Does the right front door LOCK/UNLOCK?

--

Go to Step 6

Go to Step 14

6

Does the left rear door LOCK/UNLOCK?

--

Go to Step 7

Go to Step 19

7

Does the right rear door LOCK/UNLOCK?

--

Go to Step 8

Go to Step 24

8

Does the rear door LOCK/UNLOCK?

--

Go to Power Door Locks System Check

--

9

  1. Disconnect the power door lock control module. Refer to Door Control Module Replacement .
  2. Disconnect the LH front power door lock actuator assembly.
  3. Test for continuity using a J 39200 between cavity 2 of the power door lock control module connector and cavity 2 of the LH front power door lock actuator assembly connector.

Is there continuity in the BLU wire?

--

Go to Step 10

Go to Step 11

10

Test for continuity using a J 39200 between cavity 3 of the power door lock control module connector and cavity 1 of the LH front power door lock actuator assembly connector.

Is there continuity in the BLU/RED wire?

--

Go to Step 12

Go to Step 13

11

Repair the open BLU wire between cavity 2 of the LH front power door lock actuator assembly connector and cavity 2 of the power door lock control module connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Step 5

--

12

Replace the LH front power door lock actuator assembly. Refer to Front Side Door Lock Actuator Replacement .

Is the repair complete?

--

Go to Step 5

--

13

Repair the open BLU/RED wire between cavity 3 of the power door lock control module connector and cavity 1 of the LH front power door lock actuator assembly connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Step 5

--

14

  1. Disconnect the power door lock control module. Refer to Door Control Module Replacement .
  2. Disconnect the RH front power door lock actuator assembly.
  3. Test for continuity using a J 39200 between cavity 2 of the power door lock control module connector and cavity 2 of the RH front power door lock actuator assembly connector.

Is there continuity in the BLU wire?

--

Go to Step 15

Go to Step 16

15

Test for continuity using a J 39200 between cavity 3 of the power door lock control module connector and cavity 1 of the RH front power door lock actuator assembly connector.

Is there continuity in the BLU/RED wire?

--

Go to Step 17

Go to Step 18

16

Repair the open BLU wire between cavity 2 of the RH front power door lock actuator assembly connector and cavity 2 of the power door lock control module connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Step 6

--

17

Replace the RH front power door lock actuator assembly. Refer to Front Side Door Lock Actuator Replacement .

Is the repair complete?

--

Go to Step 6

--

18

Repair the open BLU/RED wire between cavity 3 of the power door lock control module connector and cavity 1 of the RH front door lock actuator assembly connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Step 6

--

19

  1. Disconnect the power door lock control module. Refer to Door Control Module Replacement .
  2. Disconnect the LH rear door power door lock actuator assembly.
  3. Test for continuity using a J 39200 between cavity 2 of the power door lock control module connector and cavity 2 of the LH rear door power door lock actuator assembly connector.

Is there continuity in the BLU wire?

--

Go to Step 20

Go to Step 21

20

Test for continuity using a J 39200 between cavity 3 of the power door lock control module connector and cavity 1 of the LH rear door power door lock actuator assembly connector.

Is there continuity in the BLU/RED wire?

--

Go to Step 22

Go to Step 23

21

Repair the open BLU wire between cavity 2 of the LH rear door power door lock actuator assembly connector and cavity 2 of the power door lock control module connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Step 7

--

22

Replace the LH rear door power door lock actuator assembly. Refer to Front Side Door Lock Actuator Replacement .

Is the repair complete?

--

Go to Step 7

--

23

Repair the open BLU/RED wire between cavity 3 of the power door lock control module connector and cavity 1 of the LH rear door power door lock actuator assembly connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Step 7

--

24

  1. Disconnect the power door lock control module. Refer to Door Control Module Replacement .
  2. Disconnect the RH rear door power door lock actuator assembly.
  3. Test for continuity using a J 39200 between cavity 2 of the power door lock control module connector and cavity 2 of the RH rear door power door lock actuator assembly connector.

Is there continuity in the BLU wire?

--

Go to Step 25

Go to Step 26

25

Test for continuity using a J 39200 between cavity 3 of the power door lock control module connector and cavity 1 of the RH rear door power door lock actuator assembly connector.

Is there continuity in the BLU/RED wire?

--

Go to Step 27

Go to Step 28

26

Repair the open BLU wire between cavity 2 of the RH rear door power door lock actuator assembly connector and cavity 2 of the power door lock control module connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Step 8

--

27

Replace the RH rear door power door lock actuator assembly. Refer to Front Side Door Lock Actuator Replacement .

Is the repair complete?

--

Go to Step 8

--

28

Repair the open BLU/RED wire between cavity 3 of the power door lock control module connector and cavity 1 of the RH rear door power door lock actuator assembly connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Step 8

--

29

  1. Disconnect the power door lock control module. Refer to Door Control Module Replacement .
  2. Disconnect the rear door power door lock actuator assembly.
  3. Test for continuity using a J 39200 between cavity 2 of the power door lock control module connector and cavity 2 of the rear door power door lock actuator assembly connector.

Is there continuity in the BLU wire?

--

Go to Step 30

Go to Step 31

30

Test for continuity using a J 39200 between cavity 3 of the power door lock control module connector and cavity 1 of the rear door power door lock actuator assembly connector.

Is there continuity in the BLU/RED wire?

--

Go to Step 32

Go to Step 33

31

Repair the open BLU wire between cavity 2 of the rear door power door lock actuator assembly connector and cavity 2 of the power door lock control module connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

32

Replace the rear door power door lock actuator assembly. Refer to Rear Side Door Lock Actuator Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

--

33

Repair the open BLU/RED wire between cavity 3 of the power door lock control module connector and cavity 1 of the rear door power door lock actuator assembly connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

34

  1. Disconnect the power door lock control module connector. Refer to Door Control Module Replacement .
  2. Press and hold the LH front door lock switch to the LOCK position.
  3. Test for continuity between cavity 9 and ground.

Is there continuity?

--

Go to Step 35

Go to Step 36

35

  1. Disconnect the power door lock control module connector. Refer to Door Control Module Replacement .
  2. Press and hold the LH front door lock switch to the UNLOCK position.
  3. Test for continuity using a J 39200 between cavity 9 and ground.

Is there continuity?

--

Go to Step 42

Go to Step 37

36

  1. Disconnect the LH front power window/door lock switch connector.
  2. Disconnect the power door lock control module connector.
  3. Test for continuity using a J 39200 between cavity 1 of the LH front power window/door lock switch connector and cavity 9 of the power door lock control module connector.

Is there continuity in the PNK wire?

--

Go to Step 37

Go to Step 38

37

Test for continuity using a J 39200 between cavity 2 of the LH front power window/door lock switch connector and cavity 8 of the power door lock control module connector.

Is there continuity in the PNK/BLK wire?

--

Go to Step 40

Go to Step 39

38

Repair the PNK wire between cavity 1 of the LH front power window/door lock switch connector and cavity 9 of the power door lock control module connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

39

Repair the PNK/BLK wire between cavity 2 of the LH front power window/door lock switch connector and cavity 8 of the power door lock control module connector. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

40

  1. Press and hold the LH front door lock switch to the LOCK position.
  2. Test for continuity using a J 39200 between cavity 1 and cavity 9 of the switch.

Is there continuity?

--

Go to Step 41

Go to Step 43

41

  1. Press and hold the LH front door lock switch to the UNLOCK position.
  2. Test for continuity using a J 39200 between cavity 2 and cavity 9 of the switch.

Is there continuity?

--

Go to Step 42

Go to Step 43

42

Ensure the power door lock control module is still disconnected.

Test for continuity using a J 39200 between cavity 1 of the power door lock control module connector and ground.

Is there continuity in the BLK wire?

--

Go to Step 44

Go to Step 45

43

Replace the LH front power window/door lock switch.

Is the replacement complete?

--

Go to Power Door Locks System Check

--

44

Test for battery voltage using a J 39200 between cavity 7 of the power door lock control module connector and ground.

Is battery voltage tested?

--

Go to Step 46

Go to Step 47

45

Repair the BLK wire between cavity 1 of the power door lock control module connector and G200. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

46

Replace the power door lock control module. Refer to Door Control Module Replacement .

Is the replacement complete?

--

Go to Power Door Locks System Check

--

47

Repair the open in the RED wire between cavity 7 of the power door lock control module connector and fuse block 2. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Power Door Locks System Check

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