GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the BCM Diagnostic System Check performed?

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Go to Step 2

Go to Diagnostic System Check - Body Control System in Body Control System

2

Did you review the audible warnings system operation and perform the necessary inspections?

--

Go to Step 3

Go to Audible Warnings Circuit Description

3

Verify that the lights on chime is inoperative.

Does the chime operate normally?

--

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

Go to Step 4

4

  1. Insert the key in the ignition.
  2. Turn the ignition switch to the OFF position.
  3. Using a scan tool, enter BCM Data List INPUT 2.
  4. Monitor the park lamps.
  5. Move the headlamp switch to the PARK position.

Is ON displayed?

--

Go to Step 5

Go to Step 8

5

Inspect the connections at the BCM. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Are the connections in need of repair?

--

Go to Step 6

Go to Step 7

6

Repair the connections at the BCM as necessary. Refer to Connector Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 10

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7

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Is the repair complete?

--

Go to Step 10

--

8

Using a digital multimeter (DMM), backprobe and measure the voltage at BCM connector C2 terminal B6 to ground.

Is battery voltage measured?

B+

Go to Step 5

Go to Step 9

9

Locate and repair the open or high resistance in CKT 2409 between S283 and BCM connector C2 terminal B6. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 10

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10

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 4