
Downloaded from www.Manualslib.com manuals search engine 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 so.me other  things.  Instead  of 
trying  to list  everything  here,  we  ask that 
you contact 
your 
GM dealer in the  area  where you’ll be  parking  your 
vehicle.  The dealer  can  give you the  best  advice  for  that 
particular  area. 
Automatic  Transmission  Operation 
. -- 
P RNDD 21 
There  are  several  different  positions  for your  shift  lever. 
If your  vehicle  is  equipped  with  an automatic 
transmission,  it  features  an  electronic shift  position 
indicator  within  the  instrument  cluster.  This  display 
must  be  powered  anytime 
the shift  lever is capable of 
being  moved out of the PARK (P) position.  This means 
that 
if your  key  is  in  the OFF position,  but  not  locked, 
there  will  be  a small  current  drain  on  your  battery  which 
could  discharge  your  battery  over a period 
of time.  If 
you need  to  leave your  key  in  the  ignition in the OFF 
position  for  an  extended  period,  it  is  recommended  that 
you disconnect the battery  cable from  the  battery to 
prevent  discharging  your  battery. 
PARK (P): This locks  your  rear  wheels.  It’s  the  best 
position 
to use  when  you  start  your  engine because  your 
vehicle  can’t move  easily. 
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Downloaded from www.Manualslib.com manuals search engine Engine  Coolant  Temperature  Gage 
This gage  shows  the engine 
coolant temperature. 
If 
the  gage  pointer moves into 
the  red  area,  your engine  is 
260 too hot! 
TEMP 
Malfunction  Indicator  Lamp 
(Service  Engine  Soon  Light) 
Your  vehicle  is equipped 
with a computer  which 
monitors  operation  of the 
fuel, ignition  and  emission 
SERVICE 
ENGINE 
SOON 
control systems. 
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. 
In  “Problems  on  the Road,”  this manual  shows you 
what 
to do.  See “Engine Overheating” in the Index.  This 
system  is  called 
OBD I1 (On-Board 
Diagnostics-Second  Generation)  and  is  intended 
to assure 
that  emissions  are  at  acceptable  levels  for  the  life  of the 
vehicle,  helping  to produce  a cleaner  environment. 
(In 
Canada, OBD I1 is  replaced  by Enhanced  Diagnostics.) 
The  SERVICE  ENGINE  SOON  light  comes  on  to 
indicate  that  there  is  a problem  and  service 
is required. 
Malfunctions  often  will  be  indicated  by the  system  before 
any  problem  is  apparent,  which  may  prevent  more  serious 
damage  to  your  vehicle.  This  system 
is also  designed  to 
assist  your  service  technician 
in correctly  diagnosing 
any  malfunction. 
2-57   

Downloaded from www.Manualslib.com manuals search engine Check  Gages  Light 
The CHECK GAGES light 
will  come on  briefly  when 
you  are starting  the  engine. 
CHECK 
GAGES 
If the light comes  on  and  stays on  while  you  are  driving, 
check  your  coolant temperature  and  engine oil pressure 
gages  to see  if they  are 
in the  warning  zones. 
Fuel Gage 
When  the  ignition is on, the 
fuel  gage  tells 
you about 
how  much  fuel 
you 
have  remaining. 
Here  are  four  things  that  some owners  ask  about.  None 
of these  show  a problem  with  your  fuel gage: 
At the  gas  station,  the  gas pump shuts off  before  the 
It takes  a little  more  or less  fuel  to fill  up than the 
gage  reads 
FULL (F). 
gage  indicated.  For  example, the gage  may  have 
indicated  the  tank  was  half  full, but  it  actually  took  a 
little  more  or less  than  half  the  tank’s  capacity  to fill 
the  tank. 
The  gage  moves  a little  when  you  turn  a corner or 
speed up. 
The  gage  doesn’t go back  to EMPTY (E) when you 
turn  off  the  ignition. 
2-62   

Downloaded from www.Manualslib.com manuals search engine Heating 
The heater works  best if you keep  your  windows  closed 
while  using  it. On  cold days,  use 
HEATER with  the 
temperature  knob turned clockwise. 
BLEND is  useful  in 
cool  weather  when  you  have fog  or  ice on the 
windshield  or side windows. 
If you use the  optional  engine coolant  heater before 
starting  your  engine, your heating  system  will  produce 
warmer  air faster 
to heat the passenger compartment  in 
cold  weather.  See “Engine Coolant  Heater” in the  Index. 
Ventilation  System 
For  mild  outside temperatures  when  little  heating or 
cooling  is needed,  use 
VENT to  direct outside air 
through  your  vehicle.  Airflow  is through  the  instrument 
panel  outlets. 
Your  vehicle’s  ventilation  system  supplies outside air 
to 
the inside of your  vehicle  when  it is moving.  When  the 
vehicle 
is not  moving,  you  can get outside air to flow 
through  by  selecting  any mode.  and  any fan speed. 
.. .. 
You will find air  outlets  in  the  center  and  on  the  sides of 
your  instrument  panel. 
You can  move  the  outlets  to direct  the  flow of air,  or 
close  the outlets  altogether.  When  you  close an outlet,  it 
will  increase  the  flow of air coming  out of any  outlets 
that  are open. 
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Downloaded from www.Manualslib.com manuals search engine Turn Signals  When  Towing  a  Trailer 
When  you  tow a trailer,  your  vehicle  has  to  have  extra 
wiring  and  a heavy-duty  turn  signal  flasher (included 
in 
the  optional  trailering  package). 
The green  arrows  on your  instrument  panel  will  flash 
whenever  you  signal  a turn  or lane  change.  Properly 
hooked  up,  the  trailer lamps  will  also flash, telling other 
drivers  you’re  about  to turn,  change  lanes  or  stop. 
When  towing  a trailer,  the  green  arrows  on  your 
instrument  panel  will  flash for  turns  even  if the  bulbs  on 
the  trailer are  burned out. Thus,  you  may  think  drivers 
behind 
you are  seeing  your  signal when they  are  not.  It’s 
important 
to check  occasionally  to  be  sure  the  trailer 
bulbs  are still  working. 
Driving  On  Grades 
Reduce  speed  and  shift to a lower  gear before you start 
down  a long  or steep  downgrade.  If you  don’t  shift 
down, 
you might  have  to use  your  brakes so much  that 
they  would  get  hot  and  no longer work  well,  On 
a long  uphill  grade,  shift  down  and  reduce  your 
speed  to  around 
45 mph (70 kdh)  to  reduce  the 
possibility  of engine 
and transmission  overheating. 
If  you  have an automatic  transmission,  you should  use 
DRIVE (D) when  towing  a trailer.  Operating  your 
vehicle  in  DRIVE  (D)  when  towing  a trailer  will 
minimize  heat  buildup  and  extend  the  life  of your 
transmission.  Or,  if  you have a manual  transmission,  it’s 
better  not  to  use  FIFTH 
(5), just  drive in FOURTH (4) 
(or, as you  need to, a lower  gear). 
When  towing  at  high  altitude on steep uphill  grades, 
consider  the  following:  Engine  coolant  will  boil 
at a 
lower  temperature  than  at normal  altitudes.  If  you turn 
your  engine  off immediately  after towing  at  high  altitude 
on  steep 
uphill grades,  your  vehicle  may show  signs 
similar  to engine overheating.  To avoid  this, let  the 
engine  run  while  parked  (preferably  on level  ground) 
with  the  automatic  transmission  in  PARK 
(P) (or the 
manual  transmission  out  of gear  and  the  parking  brake 
applied) for 
a few  minutes  before  turning  the  engine off. 
If you do get the overheat  warning,  see “Engine 
Overheating’’ 
in the  Index. 
4-54   

Downloaded from www.Manualslib.com manuals search engine Engine  Overheating 
You will find a coolant temperature gage on your 
vehicle’s  instrument panel. 
If Steam Is Coming  From  Your Engine 
Steam  from an overheated  engine  can  burn  you 
badly,  even if you  just  open  the  hood. Stay  away 
from  the  engine  if you see  or  hear  steam  coming 
from  it. Just  turn  it 
off and  get  everyone away 
from  the  vehicle until  it cools down.  Wait  until 
there  is 
no sign of steam  or coolant  before 
opening  the  hood. 
If  you  keep  driving  when your  engine  is 
overheated,  the  liquids  in  it  can  catch  fire. You or 
others  could  be  badly  burned.  Stop  your  engine  if 
it  overheats,  and  get out  of the  vehicle  until  the 
engine  is cool. 
I NOTICE: 
If your  engine  catches  fire  because  you keep 
driving  with 
no coolant,  your  vehicle can  be 
badly  damaged.  The  costly  repairs  would not  be 
covered  by your  warranty. 
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Downloaded from www.Manualslib.com manuals search engine How to Check  Lubricant 
If the  level is below  the  bottom  of  the  filler  plug hole, 
you’ll  need  to add  some  lubricant. 
If  the  differential  is  at  operating temperature  (warm), 
add  enough lubricant 
to raise  the  level to the bottom  of 
the  filler  plug  hole.  If 
the  differential  is cold,  add  enough  lubricant  to raise 
the  level 
to 1/2  inch  (12 mm)  below  the  filler  plug hole. 
What  to Use 
Refer  to the Maintenance  Schedule to determine  what 
kind  of lubricant  to use.  See “Recommended  Fluids 
and 
Lubricants’’  in the Index. 
Engine Coolant 
The cooling  system  in  your  vehicle  is  filled  with  new 
DEX-COOL R’l (orange-colored,  silicate-free)  engine 
coolant. This  coolant  is  designed  to  remain  in  your 
vehicle  for 
5 years or 100,000 miles ( 166 000 km), 
whichever  occurs first. 
The  following  explains your cooling  system  and 
how 
to add  coolant  when  it is low.  If you have a problem 
with  engine  overheating,  see “Engine Overheating” 
in  the  Index. 
6-24   

Downloaded from www.Manualslib.com manuals search engine A 50/50 mixture of water  and  the proper coolant  for 
your  vehicle  will: 
Give  freezing protection  down  to -34°F (-37°C). 
Give  boiling protection up to 265 “F ( 129°C). 
Protect  against rust  and corrosion. 
Help  keep  the proper engine temperature. 
0 Let the warning lights and gages  work as 
they  should. 
NOTICE: 
~~  ~~~~  ~  ~~ 
When  adding  coolant  it is important  that  you use 
DEX-COOL (orange-colored,  silicate-free) 
coolant  meeting  GM  Specification  6277M. 
If silicated coolant  is  added  to  the  system, 
premature  engine,  heater  core  or  radiator 
corrosion  may  result.  In  addition,  the  engine 
coolant 
will require  change  sooner -- at 
30,000 miles (50 000 km) or 24 months, 
whichever  occurs  first.  What  to 
Use 
Use  a mixture  of one-half 
clean water (preferably 
distilled)  and  one-half  DEX-COOL  (orange-colored, 
silicate-free) antifreeze  that  meets GM Specification 
6277M’ which  won’t  damage aluminum parts.  Use 
GM  Engine  Coolant  Supplement (sealer) (GM  Part 
No. 3634621) with  any complete coolant change.  If you 
use  this mixture,  you don’t  need  to  add  anything  else. 
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 (orange-colored, 
silicate-free)  antifreeze. 
6-25