GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Are all door strikers adjusted properly and all doors closed securely?

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Go to Step 2

Go to Front Side Door Adjustment or Door Adjustment - Sliding in Doors

2

  1. Close all doors securely.
  2. Turn the ignition switch to the RUN position.

Is the DOOR AJAR indicator on?

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Go to Step 3

System OK

3

  1. Disconnect connector C203.
  2. Turn the ignition switch to the RUN position.

Is the DOOR AJAR indicator on?

--

Go to Step 4

Go to Step 5

4

  1. Check for a short to ground in CKT 804 between connector C203 terminal C6 and the instrument cluster connector C1 terminal G.
  2. If OK, replace the instrument cluster. Refer to Instrument Cluster Replacement .

Has the repair been made and the system rechecked?

--

System OK

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5

  1. Reconnect connector C203.
  2. Disconnect connector C303.

Is the DOOR AJAR indicator on?

--

Go to Step 6

Go to Step 7

6

  1. Reconnect connector C303.
  2. Disconnect connector C302.

Is the DOOR AJAR indicator on?

--

Go to Step 8

Go to Step 9

7

Repair short to ground in CKT 804 between connector C303 terminal H and left front door lock, or defective left front door lock switch.

Has the repair been made and the system rechecked?

--

System OK

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8

  1. Reconnect connector C302.
  2. Disconnect connector C402.

Is the DOOR AJAR indicator on?

--

Go to Step 10

Go to Step 11

9

Repair short to ground in CKT 804 between connector C302 terminal H and right front door lock, or a defective right front door lock switch.

Has the repair been made and the system rechecked?

--

System OK

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10

  1. Reconnect connector C402.
  2. Disconnect right sliding door jamb switch.

Is the DOOR AJAR indicator on?

--

Go to Step 12

Go to Step 13

11

Repair a short to ground in CKT 804 between connector C402 terminal E and liftgate lock, or a defective liftgate lock switch.

Has the repair been made and the system rechecked?

--

System OK

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12

  1. Reconnect the right sliding door jamb switch.
  2. Disconnect the left sliding door jamb switch (if vehicle is so equipped).

Is the DOOR AJAR indicator on?

--

Go to Step 14

Go to Step 15

13

Replace the right sliding door jamb switch. Refer to Door Jamb Switch Replacement - Sliding Door in Doors.

Has the repair been made and the system rechecked?

14

  1. Reconnect the left sliding door jamb switch (if vehicle is so equipped).
  2. Repair short to ground in CKT 804 between connector C203 to the following connectors:
  3. •  C303 terminal H.
    • C302 terminal H.
    • C402 terminal E.
    • Right sliding door jamb switch.
    • Left sliding door jamb switch.

Has the repair been made and the system rechecked?

--

System OK

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15

Replace the Left sliding door jamb switch. Refer to Door Jamb Switch Replacement - Sliding Door in Doors.

Has the repair been made and the system rechecked?

--

System OK

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