Page 156 of 398

Downloaded from www.Manualslib.com manuals search engine CHECK COOLANT LEVEL - 04 
This  message  will  appear  when there is a low  level of engine  coolant. 
Have  the cooling  system  serviced 
by a  Cadillac  technician  as  soon  as 
possible. 
CHECK  FUEL  GAGE - 39 
This  message  will  appear  when  your  fuel  supply is less  than 4 gallam ad 
your  display  is  turned off. 
CHECK  OIL  LEVEL - 36 
This  message will appear  when  your  engine  oil  is  approximately  a  quart 
low.  If  this  message  is  displayed,  check  the oil  and  add  as  needed. 
CHANGE  OIL  SOON - 40 
This  message will appear  when  your  engine  oil  is  less  than 10 percent  or 
the  mileage  since  the last  oil  change  is  more  than 
6750 miles. 
CHANGE  ENGINE OIL - 82 
This  means  that the life  of  your  engine  oil  has  expired  and  it  should  be 
changed  immediately.  See  engine  oil  and  filter  recommendations  i\
n  the 
Maintenance  Schedule.  After  an 
oil change,  the Oil  Life  Index  must  be 
reset.  See  “Oil  Life Indicator” 
in the index  on  how to reset  it. 
CRUISE  ENGAGED - 43 
This  message  will appear  for  a few seconds  when you select  a  speed  to 
cruise  at. 
ENGINE  COOLANT  HOT - 44 
This  message  will  appear  when  your  engine  coolant  temperature  i\
s  over 
126” C (259°F). To avoid  added  strain  on  a  hot  engine,  turn  off  your 
Climate  Control  system  and  stop and allow  your  vehicle  to idle  until  it 
cools  down  or the  message  is  removed.  If  it  does  not  cool  down,  turn  off 
your  engine  and  have  it  serviced  before  driving  it  again.  Seve\
re  engine  damage  can  result  from  an  overheated  engine.  See  “Engine  Ove\
rheating’’ 
in  the  Index. 
ENGINE HOT - A/C COMPRESSOR OF” - 16 
This  message  will  appear when the Climate  Control  is in “Auto”  or 
Defrost  and  the engine  coolant 
is hotter  than the normal  operating 
temperature. 
To avoid  added  .strain on a  hot  engine  the air  conditioning 
L. -4 
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compressor,.is  ,automatically $Urned.o€L =tlaat.;hap.pgns, air 
conditioned  air is not  delivered. 
If the coolant  temperature  returns to 
normal,  you  must  select  “AUTO”,  “DEFOG”  or Defrost to  return  to  a 
normal  A/C  compressor  operation. 
FUEL  LEVEL  VERY  LOW - 11 
This  message  serves  as a warning  that  the fuel  level  in  your  tank is 
critically  low. It means  you  should  stop for fuel  immediately. I 
CHECK  WASHER  FLUID - 25 
This  message  shows  that  the washer  fluid  reservoir  is  nearly  empty. 
SERVICE  A/C  SYSTEM A/C COMPRESSOR OFT - 14 I 
This  message  appears when the electronic  sensors that control  the A/C 
and heating  system are  no longer  working.  You  may notice a drop  in 
heating  and 
A/C efficiency  when  this  message  appears.  Have  your 
Climate  Control system  serviced 
if this  message  appears. 
STARTING  DISABLED  DUE  TO  THEFT  SYSTEM REMOVE 
IGNITION  KEY - 33 
This  message  will  a ear when  the Personalized  Automotive  Security 
System  (PASS  Key 
gp 11)  senses  that an improper  ignition  key  is  being  used 
to  try  to  start  the  vehicle.  Check  the ignition  key for damage. 
If it is 
damaged,  it  may need  to be  replaced. 
If you  see no  damage,  clean  the Ii 
pellet contacts  with a soft cloth  or napkin.  Remove  the ignition  key and 
wait  for  the  Driver Information Center  to display  “WAIT 
3 MINUTES”. 
The  Instrument  Panel  Cluster 
will then run a timer and  change the 
messages  to “WAIT 
2 MINUTES ”, “WMT 1 MINUTE”,  and then 
“START  CAR”.  When  the “START 
CAR” message  is  displayed,  try  again 
to  start  the engine. 
SERVICE  NOW - REFER  TO  OWNERS MANUAL - 02 
This  message  appears if you  have a problem  with  the Powertrain  Control 
Module 
(PCM). To  correct  this  problem  have  your  vehicle  serviced  at 
your  Cadillac  dealership. 
SERVICE  RIDE  CONTROL - 84 
This message  is  displayed  to indicate  that  the Suspension  System  is  not 
operating  properly. To correct this  problem  have  your  vehicle  serviced  at 
your  Cadillac  dealership at your earliest  convenience. 
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        Page 235 of 398
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If the  coolant  inside  the  coolant.  surge tank is  boiling,  don’t  do anything 
else  until  it  cools 
down. 
I 
The coolant  level  should  be visible  inside  the  surge  tank. If it  isn’t  and  the 
“ENGINE 
COOLANT LOW” message  appears  on the Driver 
Information  Center,  you  may  have  a coolant  leak  somewhere  in  the 
cooling  system.   
     
        
        Page 236 of 398

Downloaded from www.Manualslib.com manuals search engine I NOTICE: 
Engine  damage  from  running  your  engine  without  coolant  isn’t \
covered 
by your  warranty.  See  “Overheated  Engine  Protection 
Operating  Mode”  in  the  Index. 
If  there  seems  to be  no  leak,  check  to see if the  electric  engine  fans  are 
running.  If the  engine  is overheating,  both  fans  should  be running. 
If they 
aren’t,  your  vehicle  needs  service. 
How to  Add‘Coolant  to the  Coolant  Surge Tank 
If you  haven’t  found  a  problem  yet,  but  the coolant  level  isn’tvisible 
inside  the surge  tank  add  a 
50/50 mixture of clean  water  (preferably 
distilled)  and  a  proper  antifreeze  at the  coolant  surge  tank,  but  be sure 
the  cooling  system,  including  the coolant  surge  tank  pressure  cap,  is 
cool 
before you do  it.  (See  “Engine  Coolant’’  in  the Index  for  more 
information  about  the proper  coolant  mix.) 
If it isn’t, you may  have  a  leak in the  radiator  hose,  heater  hoses,  radiator, 
water  pump  or somewhere  else  in  the cooling  system. 
c 
NOTICE: 
I 
In  cold  weather,  water  can  freeze  and  crack  the  engine,  radiat\
or, - 
heater  core  and  other  parts. So use  the  recommended  coolant. L 
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4. With the coolant 
surge  tank 
pressure  cap 
off, 
start  the engine 
and  let  it  run  until 
you  can  feel the 
upper  radiator 
hose  getting  hot. 
Watch  out  for 
the 
engine  fans. 
By  this  time,  the  coolant 
level inside  the  coolant  surge  tank  may be  lower. 
If  the  level  is  lower,  add  more  of  the  proper  mix  to the  coolant  surge  tank 
until the  level  reaches  about 2 1/2 inches (60 mm) below  the  base  of the 
filler neck. 
r 
5. Then  replace  the 
pressure  cap.  Be 
sure  the  arrows 
on 
the  pressure  cap 
line up  like  this. 7 
Start  the engine  and  allow it to warm  up.  If  the “ENGINE  COOLANT 
LOW” message  does not appear on the  Driver  Information  Center, 
coolant  is at 
the proper fill level. If  an  “ENGINE  COOLANT LOW” 
message does appear,  repeat  steps 1 to 3 or see  your  dealer. 
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        Page 276 of 398
Downloaded from www.Manualslib.com manuals search engine NOTICE: 
If you use  an  improper  coolant  mix,  your  engine  could  overhea,t 
and  be  badly  damaged.  The  repair  cost  wouldn’t  be  covered  b\
y 
your  warranty.  Too  much  water  in  the  mix  can  freeze  and  crack 
the  engine,  radiator,  heater  core  and  other  parts. 
Adding Coolant 
I 
Your  cooling  system  when  hot is under a lot of pressure. If the “ENGINE 
COOLANT 
LOW” message  should  appear on the  Driver  Information 
Center, 
you will need  to add coolant. 
If the “ENGINE  COOLANT LOW” message  does  not appear, the 
coolant  is  at  the proper  fill  level. 
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To Add Coolant 
If you need  more  coolant, add  the  proper mix at the  coolant  surce tank. 
.~ .  . 
To Check or Add Coolant 
When  the engine is cold,  remove  the pressure  cap  from  the surge  tank, 
use  a flashlight  as necessary  to see  into  the  tank. The coolant  level  should 
be  visible  inside  the  tank  about 
2 112 inches (60 mm) below the base  of 
the  fill  neck. 
If you need  more  coolant, add the  proper  mix. 
SURGE TANK PRESSURE CAP 
NOTICE: 
Your surge  tank  cap  is  a 15 psi (1.05 kPa) pressure-type  cap  ana 
must  be  tightly  installed to  prevent  coolant  loss and  possible 
engine  damage 
&om overheating.  Be  sure  the  arrows on the  cap 
line  up  with  the  overflow  tube 
on the  surge  tank  filler neck. 
I k 
When  you replace  your  surge  tank pressure  cap, an GM@ cap is 
recommended. 
b. I 
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        Page 278 of 398
Downloaded from www.Manualslib.com manuals search engine THERMOSTAT 
Engine  coolant  temperature is controlled  by a thermostat in the  engine 
coolant  system.  The thermostat  stops  the  flow 
of coolant  through the 
radiator  until  the coolant  reaches 
a preset  temperature. 
When 
you replace  your  thermostat,  an AC@ thermostat  is recommended. 
POWER STEERING FLUID 
How To Check  Power  Steering  Fluid 
Unscrew  the cap  and  wipe  the  dipstick  with  a clean  rag.  Replace  the cap 
and  completely  tighten 
it. Then remove  the  cap  again  and look at  the 
fluid  level 
on the  dipstick. 
266