GM Service Manual Online
For 1990-2009 cars only

Problem

Action

The connector is loose at the dimmer switch.

Tighten or replace the connector.

The dimmer switch is improperly adjusted.

Readjust the dimmer switch. Refer to Dimmer Switch Assembly - Off Vehicle .

The dimmer switch is internally damaged or worn.

Replace the dimmer switch. Refer to Dimmer Switch Assembly - Off Vehicle .