GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Express 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Interior Lights Dimming System Check

Interior Lights Dimming System Check for Chevrolet Express 1999

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Place the headlamp and panel dimmer switch in the PARK position.
  1. Park lamps light.
  2. The interior lamps light.

2

Rotate the panel dimmer switch in both directions to increase and decrease the brightness of the interior lamps.

The interior lamps increase and decrease brightness in direct response to the panel dimmer switch position.

Instrument Panel Lamps Do Not Dim

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.