
Yneine  Coolant  Heater  (Option) 
In very  cold weather, 
0°F (- 18 O C) or  colder, 
the engine  coolant  heater 
can  help.  You’ll  get 
I 
easier  starting  and better 
fuel  economy  during 
engine  warm-up. 
A CAUTION: 
Plugging  the 
could  cause  an electrical  shock.  Also,  the  wrong 
kind 
of extension  cord  could  overheat  and  cause 
a  fire. 
You could  be  seriously  injured.  Plug  the 
cord  into  a  properly  grounded  three-prong 
110-volt  AC  outlet. 
If the  cord  won’t  reach,  use a 
heavy-duty  three-prong  extension  cord  rated for 
at  least 15 amps. 
Usually,  the  coolant  heater  should  be plugged  in  a 
minimum  of  four hours  prior  to starting  your  vehicle. 
To Use  the  Coolant  Heater 
1. Turn off the  engine. 
2. Open  the  hood  and unwrap  the  electrical  cord. 
3. Plug it into  a  normal,  grounded  110-volt  AC  outlet. 
4. After  you’ve  used  the coolant  heater,  be  sure  to 
store  the  cord  as  it was  before  to keep  it away 
from  moving  engine  parts..  If  you  don’t, it could 
be  damaged. 
How long  should  you  keep  the  coolant  heater  plugged 
in?  The  answer  depends  on  the  outside  temperature,  the 
kind  of  oil you  have,  and  some other  things.  Instead  of 
trying 
to list  everything  here,  we  ask  that  you  contact 
your  Oldsmobile  retailer  in  the  area  where  you’ll  be 
parking  your  vehicle.  The retailer  can give  you  the  best 
advice  for that  particular  area.  

Air  Conditioning 
On  very  hot  days,  open  the  windows long enough  to’let 
hot,  inside  air  escape.  This  reduces  the time  the 
compressor  has to  run,  which  should  help  fuel economy. 
For  quick  cool-down  on very  hot days,  use 
MAX with 
the  temperature  knob  all 
the way  in  the blue area.  If  this 
setting  is used  for long  periods  of  time,  the  air in  your 
vehicle  may  become too 
dry. 
For normal  cooling  on hot  days,  use  VENT  with  the 
temperature  knob  in  the  blue  area and  the  A/C button 
pushed  in.  The system  will  bring  in outside  air  and 
cool  it. 
On  cool  but  sunny  days,  the  sun  may  warm  your  upper 
body,  but  your  lower body  may  not  be  warm  enough. 
You  can  use  BI-LEVEL  with  the temperature  knob  set 
for  comfort  and  the  A/C button  pushed  in. The  system 
will  bring  in  outside  air and  direct  it to  your  upper  body, 
while  sending  slightly  warmed  air 
to your  lower  body. 
You  may  notice  this  temperature  difference  more at 
some  times  than  others. 
Heating 
On  cold  days,  use  FLOOR  with  the  temperature  knob  all 
the  way  in  the  red  area.  The system  will  bring  in  outside 
air,  heat  it and  send  it to the  floor  ducts. 
If  your  vehicle  has  an engine  coolant  heater,  you  can  use 
it  to  help  your  system  provide  warm  air  faster  when  it’s 
cold  outside  (0°F (-18°C)  or lower).  An  engine  coolant 
heater  warms  the  coolant  your  engine  and  heating 
system  use  to  provide  heat.  See “Engine  Coolant 
Heater”  in the  Index. 
Ventilation 
For  mild  outside  temperatures  when  little  heating  or 
cooling  is needed,  use  VENT  to  direct  outside  air 
through  your  vehicle.  Your vehicle  also  has  the 
flow-through  ventilation  system  described  later  in 
this  section. 
Defogging  and  Defrosting 
Your  system  has  two  settings  for  clearing  the  front  and 
side  windows.  To defrost  the windows  quickly,  use 
DEFROST  with  the  temperature  knob  all  the  way  in  the 
red  area.  To warm  passengers  while  keeping  the 
windows  clean,  use  DEFOG. 
3-3  

Manual Control 
If  you  prefer  to  manually  control  the  heating,  cooling and  ventilation  in  your  vehicle,  set  the  system  to  the 
temperature  and  fan  speed  you  want.  Next,  push  the 
desired  airflow  direction  pushbutton.  The system  will 
try to  maintain  the  temperature  you set using  the  mode 
you  select.  The following  suggestions  will  help  the 
system  run  more  efficiently  in  manual  mode. 
Air  Conditioning 
On  very  hot  days,  open  the  windows  long  enough  to 
let  hot,  inside  air escape.  This reduces  the  time  the 
compressor  has  to  run,  which  should  help  fuel economy. 
For  quick  cool-down  on very  hot.  days,  use  RECIRC. 
If  this  setting  is used  for long  periods  of  time,  the air 
in 
your  vehicle  may  become  too  dry. 
For  normal  cooling  on hot days,  use  UPPER  with  the 
A/C button  pushed  in.  The system  will  bring  in  outside 
air  and  cool 
it. 
Heating 
On  cold  days,  use  LOWER.  The system  will  bring in 
outside  air,  heat it and  send  it to  the  floor  ducts. 
If  your  vehicle  has  an  engine  coolant  heater,  you  can use 
it to  help  your  system  provide  warm  air faster  when  it’s 
cold  outside 
(0°F (-18°C)  or lower).  An  engine  coolant 
heater  warms  the  coolant  your  engine and  heating 
system  use  to provide  heat.  See “Engine  Coolant 
Heater”  in  the  Index. 
Ventilation 
For  mild  outside  temperatures  when  little  heating  or 
cooling  is needed,  use  UPPER  to direct  outside  air 
through  your  vehicle.  Your vehicle  also  has  the 
. 
flow-through  ventilation  system,  described  later  in 
this  section. 
Defogging  and  Defrosting 
Your  system  has  two  settings  for  clearing  the  front  and 
side  windows. 
To defrost  the  windows  quickly,  use  DEF. 
To warm  passengers  while  keeping  the  windows  clean, 
use  DEFOG. 
On 
cool  but sunny  days,  the  sun  may  warm  your  upper 
body,  but your  lower  body  may  not  be warm  enough. 
You  can  use 
BI-LEV with  the A/C  button  pushed  in. 
I The system  will  bring  in  outside  air and  direct  it to  your 
upper  body,  while  sending  slightly  warmed  air 
to your 
3-6  

Ventilation  System Ventilation Tips 
Adjust the direction  of airflow  by moving  the 
louvered vents. 0 
Your  vehicle’s  flow-through ventilation  system supplies 
outside air  into the vehicle  when it is  moving. Outside 
air  will  also enter  the vehicle  when the air conditioning 
0 
fan  is running. 
0 
Keep  the  hood  and  front air inlet  free of ice,  snow  or 
any  other obstruction,  such 
as leaves. The heater  and 
defroster  will  work  far better,  reducing the chance 
of 
fogging  the inside  of your  windows. 
When  you  enter a vehicle  in  cold  weather,  set the 
mode  to 
FLOOR or  LOWER  and  the  fan  to  the 
highest  speed for a few  moments  before driving 
off. 
This helps clear the intake  ducts of snow  and 
moisture and reduces the chance  of fogging the 
inside  of your  windows. 
Keep  the  air path  under  the  front seats clear  of 
objects. This helps air to circulate  throughout 
your  vehicle. 
.. 
3-7  

Snow can trap  exhaust  gases  under your vehicle. 
This  can cause  deadly  CO (carbon  monoxide) 
gas 
to get  inside.  CO could  overcome  you  and kill 
you.  You  can’t  see it  or smell  it, 
so you  might  not 
know  it is  in  your  vehicle.  Clear away  snow  from 
around  the base  of your  vehicle,  especially  any 
that 
is blocking  your exhaust  pipe.  And  check 
around  again  from  time 
to time to be  sure  snow 
doesn’t  collect  there. 
Open  a  window  just 
a little on the  side of the 
vehicle  that’s  away 
from the  wind.  This  will  help 
keep  CO out. 
Run  your  engine  only  as long  as you must.  This  saves 
fuel.  When  you  run  the  engine,  make  it go a little  faster 
than  just idle.  That  is,  push  the  accelerator  slightly.  This 
uses  less fuel for  the  heat  that  you  get  and  it keeps  the 
battery  charged.  You will  need  a  well-charged  battery  to 
restart  the  vehicle,  and  possibly  for signaling  later on 
with  your  headlamps.  Let  the  heater  run  for awhile. 
Then,  shut  the  engine 
off and  close  the  window  almost 
all  the  way  to  preserve  the  heat.  Start the  engine  again 
and  repeat  this only  when  you  feel really  uncomfortable 
from  the  cold. But do it  as  little  as possible.  Preserve  the 
fuel 
as long  as  you  can. To help  keep  warm,  you  can  get 
out  of  the  vehicle  and  do some  fairly  vigorous  exercises 
every  half  hour  or 
s_o until  help  comes. 
-  

If No Steam,Is Coming From Your Engine If  you  no  longer  have  the  overheat  warning,  you  can 
If  you  get  the  overheat  waning but 
see or hear  no 
the  engine  can  get  a  little  too  hot  when  you:  drive. Just 
to be  safe,  drive  slower  for  about 10 minutes. 
If  the  warning  doesn’t  come  back  on,  you  can 
~ steam,  the  problem  may  not  be too serious.  Sometimes  drive  normally. 
I Y Y 
’ Climb a long hill on a hot  day. 
Stop  after  high-speed  driving. 
Idle for long  periods  in traffic. 
Tow  a  trailer. 
If  you  get  the  overheat  warning  with  no sign  of steam, 
try  this  for  a  minute  or 
so: ,. 
1. Turn off your air conditioner.  If 
the  warning  continues,  pull  over,  stop,  and  park  your 
vehicle  right  away. 
If  there’s  still  no  sign 
of steam,  you  can  idle  the  engine 
for  two  or  three  minutes  while  you’re  parked,  to see  if 
the  warning  stops.  But  then,  if  you  still  have  the 
1 
warning, turn off the  engine and get everyone out of the 
vehicle 
until  it  cools  down. 
You  may  decide  not  to lift the  hood  but  to  get  service 
help  right  away. 
2. Turn  on  your  heater  to full  hot at the  highest  fan 
speed  and  open  the  window 
as necessary. 
3. If you’re  in a  traffic  jam, shift to NEUTRAL (N); 
otherwise,  shift  to the highest  gear  while 
driving 
-- AUTOMATIC OVERDRIVE (@) 
or  THIRD (3). 
5-14  

j If the  coolant  inside  the  coolant  recovery  tank is boiling, 
don’t  do  anything 
else until  it cools  down. 
.. - ”r -+ 
Heater  and  radiator  hoses, and  otherengine 
parts,  can  be  very  hot.  Don’t  touch  them. 
If you 
do,  you  can be burned. 
Don’t  run the engine 
if there  is a leak. If you run 
the  engine, 
it could  lose  all coolant.  That could 
cause  an engine  fiie, 
and you  could  be  burned. 
Get  any  leak  fixed  before  you  drive the vehicle. 
’ 
I NOTICE: 
The coolant  level  should  be at or  above  the COLD mark 
on  a  cold  engine.  The coolant  level  should  be  at or 
above  the  HOT  mark  on  a  hot  engine.  If it isn’t,  you 
may  have  a  leak  in the  radiator  hoses,  heater  hoses, 
radiator,  water  pump  or  somewhere  else  in  the  cooling  system. 
r 
Engine  damage  from running your  engine 
without  coolant  isn’t  covered  by  your  warranty. 
If there  seems to be  no  leak,  with  the  engine on, check  to 
see  if the  electric  engine  fan(s)  are running.  If  the  engine 
is overheating,  both  fan@)  should  be  running;  If they 
aren’t,  your  vehicle  needs  service. 
5-16  

How to Add Coolant  to  the  Coolant 
Recovery  Tank 
If you haven’t  found  a  problem yet, but  the coolant  level 
isn’t  at  the  COLD  mark,  add  a 
50/50 mixture of clean 
water 
(preferably  distilled)  and  DEX-COOL 
(orange-colored,  silicate-free)  antifreeze  at  the  coolant 
recovery 
tad. (See “Engine  Coolant”  in the  Index  ’for 
more  information.) 
I 
A CAUTION: 
-  - 
Adding  only  plain water  to your  cooling  system 
can  be  dangerous.  Plain water,  or some  other 
liquid  like  alcohol,  can boil  before  the  proper 
coolant  mix  will.  Your  vehicle’s  coolant  warning 
system 
is set  for  the  proper  coolant mix. With 
plain  water  or the  wrong,  mix,  your engine  could 
get  too  hot  but you  wouldn’t  get  the overheat 
warning.  Your engine  could  catch fire  and  you 
or 
others could  be  burned. Use a 50/50 mix  of clean 
water  and 
DEX-COOL antifreeze. 
NOTICE: 
In  cold  weather,  water can freeze  and  crack  the 
engine,  radiator, heater  core and  other  parts. 
Use  the recommended  coolant  and the proper 
coolant  mix. 
5-17