GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Door Lock/Indicator Schematics

Connector End View Reference: Vehicle Access Connector End Views

1

Did you review the Power Door Locks Description and Operation?

Go to Step 2

Go to Symptoms - Vehicle Access

2

Verify that the power door locks are inoperative.

Do the power door locks operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Are the power door locks and the driver power window inoperative?

Go to Step 7

Go to Step 4

4

Are the power door locks inoperative from a single door lock switch?

Go to Step 5

Go to Step 6

5

Is the driver door lock switch the inoperative switch?

Go to Step 8

Go to Step 9

6

Is the driver door lock actuator the inoperative actuator?

Go to Step 10

Go to Step 11

7

Test the battery positive voltage circuit of the drivers switch assembly for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 8

8

Test the ground circuit of the drivers switch assembly for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 13

9

Test the passenger door lock switch control circuits for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 12

10

Test the driver door lock actuator unlock control circuit for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 14

11

Test the door lock actuator control circuits for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 15

12

Test the passenger door lock switch ground circuit for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 16

13

Inspect for poor connections at the harness connector of the drivers switch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 17

14

Inspect for poor connections at the harness connector of the driver door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 18

15

Inspect for poor connections at the harness connector of the appropriate passenger door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 19

16

Inspect for poor connections at the harness connector of the passenger door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 20

17

Replace the driver switch assembly. Refer to Door Lock Switch Replacement - Driver Door .

Did you complete the repair?

Go to Step 21

--

18

Replace the driver door lock actuator. Refer to Front Side Door Lock Replacement .

Did you complete the repair?

Go to Step 21

--

19

Replace the appropriate passenger door lock actuator. Refer to Front Side Door Lock Replacement or Rear Door Lock Replacement .

Did you complete the repair?

Go to Step 21

--

20

Replace the passenger door lock switch. Refer to Door Lock Switch Replacement - Passenger Front .

Did you complete the repair?

Go to Step 21

--

21

Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2