GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire headlight leveling system check performed?

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Go to Step 2

Go to Headlight Leveling System Check

2

  1. Turn the headlamps on.
  2. Visually verify that the headlamps are operative.
  3. Adjust the IP dimmer switch to a mid-range position.
  4. Disconnect the connector at the headlamp leveling switch.
  5. Connect a test light between cavities 7 and 6 of the headlamp leveling switch connector.

Did the test light illuminate?

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Go to Step 3

Go to Step 4

3

Replace the headlamp leveling switch. Refer to Headlamp Leveling Switch Replacement

Is the repair complete?

--

Go to Step 5

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4

Repair the poor connection or open in circuit 650.

Is the repair complete?

--

Go to Step 5

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5

  1. Turn the ignition switch to the OFF position.
  2. Reconnect all connectors/components removed.

Have all repairs been made?

--

Go to Headlight Leveling System Check

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