Pontiac 2003 Vibe - Manual (Page 108)

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When it begins to get dark, the headlamps will
automatically switch from DRL to the regular
headlamps. See “Automatic Light Control” earlier in
this section.
When you turn the exterior lamp switch off, the regular
lamps will go off and your headlamps will change to the
reduced brightness of DRL provided it is not dark
outside. DRL also comes on if only the parking lamps
are being used.
To idle your vehicle with the DRL off, do the following:
1. Set the parking brake.
2. Turn the ignition off.
3. Turn the ignition back on.
The DRL will stay off until you release the
parking brake.
As with any vehicle, you should turn on the regular
headlamp system when you need it.
Interior Lamps
Interior/Instrument Panel Brightness Dial
The interior/instrument
panel brightness dial is
located to the left of the
steering wheel on the
instrument panel.
The brightness of the instrument panel lights will not
decrease when the headlamps are on. It is recommended
that the brightness level is kept at the maximum setting
for all daytime driving to insure proper visibility.