Headlamps On Reminder; Daytime Running Lamps (Drl) - GMC 2005 Yukon Owner's Manual

A circuit breaker protects your headlamps. If you have
an electrical overload, your headlamps will flicker on and
off. Have your headlamp wiring checked right away if
this happens.

Headlamps on Reminder

A reminder chime will sound when your headlamps or
parking lamps are manually turned on and your ignition
is off, in LOCK, ACCESSORY, or your door is open.
To disable the chime, turn the light off then back on.

Daytime Running Lamps (DRL)

Daytime Running Lamps (DRL) can make it easier for
others to see the front of your vehicle during the
day. DRL can be helpful in many different driving
conditions, but they can be especially helpful in the short
periods after dawn and before sunset. Fully functional
daytime running lamps are required on all vehicles
first sold in Canada.
The DRL system will come on when the following
conditions are met:
•
The ignition is on
•
The exterior lamps control is in AUTO
•
The automatic transmission is not in PARK (P)
•
The light sensor determines it is daytime
When the DRL are on, only your DRL lamps will be on.
The taillamps, sidemarker and other lamps won't be
on. The instrument panel won't be lit up either.
When it begins to get dark, the automatic headlamp
system will switch from DRL to the headlamps.
When you turn the headlamp switch off, the headlamps
will go off, and your DRL lamps will illuminate,
provided it is not dark outside.
Shifting the transmission into PARK (P) will allow you
to idle the vehicle with the DRL off. The DRL will stay
off until you shift the transmission out of PARK (P).
This procedure applies only to vehicles first sold in the
United States.
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