GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Express 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Daytime Running Lights (DRL) System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn the headlamp switch to the ON position (headlamps on).
  2. Turn the headlamp dimmer switch to the LOW beam position.
  1. The low beam headlamps are ON.
  2. The high beam headlamps are OFF.
    • Headlamps Inoperative-Low Beam . Refer to Headlamps Inoperative - Low Beams .
    • Headlamps Inoperative-Low and High Beams. Refer to Low and High Beams Headlamps Inoperative .
    • Headlamp Inoperative-One Lamp. Refer to Headlamps Inoperative - One Lamp .

2
  1. Turn the headlamp dimmer switch to the HIGH beam position.
  2. Return the headlamp dimmer switch to the LOW beam position.
  1. The high beam headlamps are ON.
  2. The high beam indicator is ON.
  3. The low beam headlamps are OFF.
  4. Headlamps return to the low beam position.
    • Headlamps Inoperative-High Beams (and/or High Beam Indicator). Refer to Headlamps Inoperative - High Beams .
    • Headlamps Inoperative-Low and High Beams. Refer to Low and High Beams Headlamps Inoperative .

3
  1. Turn the headlamp switch to the OFF position.
  2. Turn the ignition switch to the ON position.
  3. Cover the daytime running lamps ambient light sensor with a dark cloth (Canada only).

DRL headlamps and park lamps operate.

DRL Headlamps Inoperative. Refer to Daytime Running Lamps (DRL) Headlamps Inoperative

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