key GMC ENVOY 1998 Owner's Manual
Page 98 of 386
Rotate  the  knob  to  the  right  to  the  master  lamps  symbol 
to  turn on all  the  lamps  listed  as  well  as 
the headlamps. 
Rotate  the 
knob all the  way  to  the  left  to  turn off your 
lamps  and  put  the  system  in  automatic  headlamp  mode. 
Automatic  Headlamp System 
When  it is  dark  enough  outside,  your  automatic 
headlamp  system  will  turn  on  your headlamps  at  the 
normal  brightness  along  with  other  lamps  such  as  the 
taillamps,  sidemarker,  parking  lamps  and  the  instrument 
panel  lights.  The  radio  lights  will  also  be  dim. 
Your  vehicle  is  equipped  with  High  Intensity  Discharge 
(€€ID) headlamps.  Your headlamps  come  on  at  lower 
intensity  and  gradually  increase  to  full  brightness. 
Your  vehicle  is  equipped  with 
a light  sensor  on  the  top 
of  the  instrument  panel  under  the  radio  speaker  grille, 
so 
be  sure  it  is  not  covered,  which  will  cause  the  system  to 
be  on  whenever  the  ignition  is  on. 
The  system  may also  turn  on your  headlamps  when 
driving  through  a parking  garage,  heavy  overcast 
weather, a  tunnel  or  fueling  your  vehicle  in  a low-light 
area.  This  is  normal. 
There  is  a delay  in  the  transition  between  the  daytime 
and  nighttime  operation  of the  Daytime  Running  Lamps 
(DRL)  and  the  automatic  headlamp  systems 
so that  driving  under  bridges  or  bright  overhead  street  lights 
does  not  affect  the  system.  The DRL  and  automatic 
headlamp  system  will  only  be  affected  when  the  light 
sensor 
sees a  change  in  lighting  lasting  longer  than 
the  delay. 
To idle  your  vehicle  with  the  automatic  headlamp 
system 
off, set  the  parking  brake  while  the  ignition  is 
off. Then  start  your vehicle.  The  automatic  headlamp 
system  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. 
Lamps  On  Reminder 
A  reminder  chime  will  sound  when  your headlamps  or 
parking  lamps 
are manually  turned  on  and  your ignition 
is  in 
OFF, LOCK  or  ACCESSORY.  To  disable  the 
chime,  rotate  the  thumb  wheel  all  the  way down.  In 
the 
automatic  mode,  the  headlamps  turn off once  the 
ignition  key is  in 
OFF, 
Daytime  Running  Lamps 
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. 
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Interior Lamps 
Brightness Control 
Rotate the thumbwheel  next to  the  headlamp  switch up 
to  make  your  instrument  panel lights  brighter. Turn the 
switch  all the  way  up to turn 
on the interior  lamps. 
Front  Reading  Lamp? 
Press the button  near  each  lamp on the overhead  console 
to turn the reading lamps 
on and off. The  lamps can  be 
swiveled to point  in the desired  direction. 
If  you  have the 
mini console,  press the lens on  each 
lamp 
to turn it on or off. 
Exit  Lighting 
With  exit  lighting,  the interior lamps will come on when 
you  remove 
the key from  the  ignition.  These  lights  will 
stay 
on for a short period  of time  and then will  go out. 
Illuminated  Entry 
Your vehicle is equipped  with  an illuminated  entry  feature. 
When  the doors  are opened,  the dome  lamps  will come 
on if the DOME OVERRIDE button  is out.  When  all the 
doors  are closed,  or  the  front door handles  are lifted and 
released, the lamps  will stay 
on for a short period  of 
time and  will then  go 
out. If the  dome  lamp  button  is 
pressed  in, the  lamps  will 
go out immediately. 
Dome Lamps 
The dome  lamps  will come  on when  you open  the doors. 
You  can 
also turn  the  dome  lamps on by rotating  the 
thumbwheel,  located next  to the parking/headlamps 
knob, all the  way 
LIP. In this position, the dome  lamps 
will  remain  on whether  the  doors are opened  or  closed. 
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You can use the DOME OVERRIDE button, located Mirrors 
below the parking/headlamp knob, to set the  dome 
lamps  to come 
on automatically  when the doors  are Electrochromic  Daymight Inside Rearview 
opened, or to remain  off. To turn the  lamps  off, press the Mirror 
button  once into the “in” position.  With the button  in 
this position, the  dome lamps  will remain  off when the 
doors  are open. 
To return the  lamps  to automatic 
operation, press the button  again  and return  it to  the 
“out” position.  With the button  in this position, the  dome 
lamps will come  on when  you open  the door. This  will 
not  override  the illuminated entry  feature. 
Battery Run-Down  Protection 
This feature shuts off the dome,  courtesy,  vanity, 
reading,  glove 
box and underhood  lamps if they  are left 
on  for  more  than 
20 minutes  when the ignition  is off. 
This  will keep your battery from running down. 
If  the battery run-down  protection  shuts  off the interior 
lamps,  it may  be  necessary to  do  one of  the following to 
return 
to normal operation: 
0 Shut  off  all  lamps and  close all doors,  or 
Turn the ignition  key to RUN. 
This  mirror automatically  changes to reduce glare from 
headlamps  behind you. A photocell  on 
the back of the 
mirror  senses when it is  becoming dark  outside. Another 
photocell 
built into  the mirror  surface  senses when 
headlamps  are behind you. 
At night,  when the glare  is too  high, the mirror  will 
gradually darken 
to reduce  glare  (this change may take a 
few  seconds).  The  mirror will return  to its  clear  daytime 
state  when  the glare 
is reduced.  The vehicle will  also 
return to its  clear daytime  state when  the vehicle is  put 
into 
REVERSE (R). 
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Page 123 of 386
1 ing Lights, Gages and Indicators 
This part describes the warning lights and  gages that 
may  be on  your vehicle.  The pictures will help  you 
locate  them. 
Warning lights and gages can signal  that something  is 
wrong before 
it becomes  serious enough to  cause an 
expensive  repair or replacement.  Paying attention to 
your warning lights and  gages  could also save  you or 
others  from injury. 
Warning lights  come 
on when there may  be or  is  a 
problem  with one 
of your vehicle’s functions. As you 
will  see in the details 
on the next few pages,  some 
warning lights  come 
on briefly when you start the 
engine  just  to let you know  they’re  working.  If you are 
familiar  with this section,  you should  not  be alarmed 
when this happens. 
Gages  can indicate when there  may  be or is a problem 
with  one 
of your vehicle’s  functions. Often gages and 
warning lights work together  to let  you  know when 
there’s 
a problem  with your vehicle.  When 
one of the warning lights  comes 
on and stays on 
when  you  are  driving,  or when  one of the  gages  shows 
there  may be 
a problem,  check the section that tells  you 
what 
to do  about it. Please follow  this manual’s advice. 
Waiting  to  do repairs can be costly 
-- and even 
dangerous. So please get to know your warning lights 
and  gages.  They’re  a  big help. 
Safety Belt Reminder Light 
When  the  key is turned  to RUN or START, a chime will 
come  on for  about eight  seconds  to remind people to 
fasten their  safety belts, unless the  driver’s safety belt 
is 
already buckled. 
The safety belt light  will 
also  come  on and stay  on 
for  about 
20 seconds, then 
it will  flash  for about 
55 seconds. 
If the  driver’s  belt is already buckled, neither the  chime 
nor the light  will come  on. 
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Air Bag Readiness  Light 
There is  an air bag readiness  light on the instrument 
panel,  which  shows 
the air bag  symbol.  The  system 
checks  the air bag’s electrical  system  for  malfunctions. 
The  light tells  you 
if there is an electrical  problem.  The 
system  check includes 
the air bag sensors,  the air  bag 
module, the wiring and the  diagnostic module. For more 
information 
on the air  bag  system,  see  “Air  Bag” in 
the Index. 
This light will come  on 
when  you  start your engine, 
and 
it will flash  for  a  few 
seconds.  Then  the light 
should  go  out.  This  means 
the system  is ready. 
If the air  bag  readiness  light  stays on after  you start the 
engine  or comes  on when you are  driving,  your air  bag 
system  may 
not work properly. Have your  vehicle 
serviced right away. 
The  air  bag readiness  light should  flash  for  a few 
seconds  when 
you turn the ignition key to RUN. If the 
light  doesn’t  come 
on then, have it fixed so it will be 
ready  to warn 
you if there is a problem. 
Charging System Indicator Light 
The  charging system light 
will  come  on briefly when 
you  turn on the ignition,  but 
’ the engine is  not running, 
as a check to show you it 
is  working. 
It should  go out  once  the engine 
is running. If it stays 
on, or comes  on while  you are driving,  you  may  have a 
problem  with the charging  system. 
It could  indicate  that 
you  have problems  with 
a generator  drive  belt, or 
another  electrical  problem.  Have 
it checked  right away. 
Driving while this light 
is on could  drain  your battery. 
If you must  drive  a  short distance  with the light  on, be 
certain  to turn  off  all your accessories,  such as the  radio 
and  air conditioner. 
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Brake System  Warning  Light 
When the ignition is on, the brake  system warning  light 
will  come  on when  you set your parking  brake.  The light 
will  stay  on 
if your  parking  brake doesn’t release fully. 
If it stays on after your parking brake  is fully released, it 
means you have a brake  problem. 
If the light  comes on while you are  driving,  pull off the 
road and  stop carefully. 
You may  notice that the pedal is 
harder  to push. 
Or, the  pedal  may go  closer  to  the floor. 
It  may  take  longer to  stop. 
If the light is still on, have the 
vehicle towed for  service. (See “Towing  Your  Vehicle” 
in the Index.) 
Your  vehicle’s hydraulic brake  system is  divided into 
two parts. 
If one  part  isn’t working,  the  other part can 
still work  and stop  you.  For good braking,  though, you 
need  both  parts  working  well. 
If the warning  light  comes  on,  there  could  be a brake 
problem.  Have your brake  system inspected right  away. 
This  light should  come 
on 
briefly  when  you turn the 
ignition  key to 
RUN. If it 
it fixed so it will be ready 
to warn  you if there’s 
a problem. 
(0) (8> doesn’t  come  on then, have 
BRAKE 
Your  brake  system  may  not  be  working  properly 
if  the  brake  system warning  light  is  on.  Driving 
with  the  brake  system  warning  light  on can  lead 
to  an  accident. 
If the  light  is still  on  after  you’ve 
pulled  off  the road  and  stopped  carefully,  have 
the  vehicle  towed  for service. 
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Anti-Lock  Brake  System  Warning  Light 
With the anti-lock  brake 
system, this light  will come 
on when  you start your 
engine  and may stay 
on 
for several  seconds. 
That’s  normal. 
If  the light stays on,  or comes  on when you’re driving, 
your vehicle needs  service. If the regular brake system 
warning light isn’t on, 
you still have brakes,  but you 
don’t have anti-lock  brakes.  If  the regular brake system 
warning light is 
also on,  you  don’t  have anti-lock  brakes 
and  there’s  a problem with your regular brakes.  See 
“Brake  System  Warning Light”  earlier 
in this section. 
The  anti-lock  brake system warning light should  come 
on briefly when you turn the ignition key to RUN. If the 
light doesn’t  come on then, have it fixed 
so it will  be 
ready to  warn  you 
if there is a problem. 
Engine  Coolant  Temperature  Gage 
This gage  shows  the engine 
coolant temperature.  If the 
gage  pointer moves into 
the 
red area,  your engine is 
too hot! 
It means that your  engine  coolant has overheated. If you 
have been  operating your vehicle under normal  driving 
conditions, 
you should pull  off the road,  stop your 
vehicle and turn  off 
the engine as soon as possible. 
The “Problems on the Road” section 
of this manual 
shows  you what to  do.  See  “Engine  Overheating” 
in 
the Index. 
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If the Light Is Flashing 
The following  may prevent more serious  damage to 
your  vehicle: 
Reducing vehicle  speed. 
Avoiding hard accelerations. 
Avoiding steep uphill grades. 
If you are towing  a trailer, reduce the amount  of 
cargo  being hauled  as soon 
as it is  possible. 
If  the light stops  flashing and remains  on steady,  see 
“If 
the Light Is On  Steady”  following. 
If 
the light continues to flash,  when it is safe to do so, 
stop the vehicle. Find a safe  place to park  your vehicle. 
Turn the  key off, wait  at least  10 seconds and restart the 
engine.  If the light remains  on steady,  see “If the Light 
Is  On  Steady”  following. 
If the light is still flashing, 
follow  the previous  steps,  and  drive the vehicle  to your 
dealer  or qualified  service  center  for  service. 
If the  Light Is On Steady 
You may  be  able to correct the  emission system 
malfunction  by considering  the following: 
Did  you recently put 
fuel into your vehicle? 
If 
so, reinstall  the fuel  cap,  making sure to fully install 
the  cap.  The  diagnostic system can determine  if the fuel 
cap  has been left  off or improperly installed. 
A loose  or 
missing  fuel  cap  will allow fuel  to  evaporate  into  the 
atmosphere. 
A few  driving  trips with the cap  properly 
installed should turn the light  off. 
Did you just  drive through  a  deep puddle  of water? 
If 
so, your electrical system  may  be wet. The condition 
will  usually be corrected when the electrical system 
dries  out. 
A few driving trips should turn the light  off. 
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I A CAUTION: 
Don’t keep driving  if the  oil pressure is low. If 
you do, your engine  can become so hot that  it 
catches  fire. You or others  could be burned. 
Check your  oil 
as soon as possible and have your 
vehicle  serviced. 
I 
I NOTICE: 
Damage  to your engine from  neglected  oil 
problems can  be  costly and 
is not covered  by 
your warranty. 
Security Warning Light 
SECURITY 
This  light will  come on 
briefly when  you turn the 
key toward START. The 
light  will stay  on until the 
engine  starts. 
If  the light flashes,  the Passlock system has entered  a 
tamper mode. 
If the vehicle  fails  to start, see “Passlock” 
in the Index. 
If the light  comes on continuously  while  driving and 
stays 
on, there  may be a problem  with the Passlock 
system.  Your vehicle  will  not  be protected  by Passlock, 
and  you  should see your dealer. 
This  light should  also flash  as you  open 
the door  (if your 
ignition is off). 
This is  a reminder to activate the 
theft-deterrent  system.  See “Content Theft-Deterrent” in 
the  Index  for more information. 
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Drunken  Driving 
Death and injury associated with drinking  and driving  is 
a  national  tragedy. It’s the number  one  contributor  to 
the 
highway death toll, claiming  thousands of victims 
every  year. 
Alcohol  affects  four  things  that anyone nee.ds 
to drive 
a  vehicle: 
0 Judgment 
0 Muscular  Coordination 
Vision 
0 Attentiveness. 
Police  records  show  that almost half  of  all motor 
vehicle-related  deaths involve  alcohol.  In most  cases, 
these  deaths  are 
the result of someone  who was drinking 
and  driving.  In recent  years,  over 
17,000 annual  motor 
vehicle-related  deaths  have been associated  with the use 
of  alcohol,  with more  than 
300,000 people  injured. 
Many adults 
-- by  some  estimates,  nearly half the adult 
population 
-- choose  never to  drink  alcohol, so they 
never  drive  after  drinking.  For  persons  under 2 
1, it’s 
against the  law 
in every U.S. state  to drink alcohol. 
There  are good  medical, psychological  and 
developmental  reasons  for  these  laws.  The  obvious 
way to solve  this highway  safety problem 
is  for people  never 
to drink alcohol  and then  drive.  But 
what 
if people  do? How much is ”too  much” if the 
driver plans to  drive?  It’s 
a lot less than many might 
think. Although 
it depends on each  person and  situation, 
here 
is some  general  information on  the problem. 
The  Blood Alcohol Concentration 
(BAC) of someone 
who is drinking  depends upon four things: 
0 The amount of alcohol  consumed 
0 The drinker’s body  weight 
The amount  of food  that is  consumed  before and 
during  drinking 
0 The length  of time it has taken  the drinker to 
consume  the alcohol. 
According  to the American  Medical Association, 
a 
180-lb.  (82  kg)  person who  drinks  three  12-ounce 
(355 ml) bottles  of  beet- in an hour  will end up with a 
BAC of about 0.06 percent.  The person  would reach the 
same 
BAC by  drinking  three 4-ounce  (120 ml) glasses 
of  wine  or three mixed drinks 
if each  had 1 - 1/2 ounces 
(45 
mlj of  a liquor like whiskey,  gin or vodka. 
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