GMC 2003 Envoy - Manual (Page 140)

There 15 a d&lay in ihe transition holween (he daylime
and nighttime operation of the Daytime Running
Lamps (DHL) and the aulomatic headlamp systems,
so that driving under bridges or bright overhead street
lights does not attecl the system. The DRL and
automatic headlamp syslem will only be affected when
the Icght sensor sees a change in lighting lasling
longer than Iha delay
If you start your vehicle in a dark garage, the automatic
headlamp system will come or^ immediaiely. Once
yon leave Ihe garage, it will ta!;e approximalely
one minute for the automatic headlamp system to
change to DRL If it is light outside. During that delay,
your Instrumeni panel cluster may not be as bright
as usual. Make sure your instrument panel brightness
control 15 in Ihe full bright position.
To idle your vehicle with the automatic headlamp
system ott, sat the parking brake while the igniitiron is off.
Then start your vehicle. The automatic headlamp
systen^ will stay off until you release the parking brako,
shih out oi park or turn the exterior lamp control lo
the off position as described in "Exterior Lamps'^.
Lamps On Reminder
A reminder tone wall sour>d whan your headlarnps or
parking lamps are manually turned on^ Ihe dnver's door
IS open and your ignition is in LOCK or ACCESSORY,
To turn the lone olí, (игл tha knob all The way
counterclockwise. In the automatic mode. The headlamps
turn off once the ignilion. ikey is in LOCK,
Daytime Running Lamps
Daytime Running Lamps {DRL) can imake it easier (or
others to see the front ot your vehicle during the
day. DRL can be helpful in many different driving
condMions, bul they can bo especially helpful in Ihe short
periods after dawn and before sunsef. Fully iunctionai
daytime running lamps are required ort all vehicles
Hrst sold in Canada.
The DRL system will make your headlamps come on
at reduced brig hi ness when the following condiiions
are met:
% The ignition is on,
\ the exterior lamps Knob is in aulomattc:
headlamp rrode,
^ Ihe light sensor delects daylime lighu and
\ the transrriissfon 15 not In PARK (P).
When the DRL are on, only your headlamps will be on.
The iaillamps, sidemarkor and olher lamps won't be
on. The instrument panel won't ibe lit up ailher
When il begins to gel dark, the headlamps will
□ulomatlcalfy switch from DRL to the regular headlamps.
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