
Oil Pressure Gage 
The oil pressure  gage  shows the engine oil pressure in psi (pounds  per 
square  inch)  when  the engine is running. Canadian  vehicles  indicate 
pressure 
in kPa (kilopascals). Oil pressure  may  vary with engine  speed, 
outside  temperature  and  oil viscosity,  but readings  above the 
low pressure 
zone indicate  the norn~al  opcrating  ranse. 
A reading in the low pressure zone may bc caused by a dangemusly  low oil 
level or  other  problem  causing low oil pressure.  Check  your oil as soon as 
possible. 
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. 
NOTICE: 
Damage  to  your  engine  from  neglected  oil problems  can  be 
costly  and is not  covered  by your  warranty. 
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When you want to leave  the freeway,  move to the  proper  lane  well  in 
advance.  If 
you miss your exit  do not,  under any  circumstances,  stop  and 
back  up. Drive  on 
to the next exit. 
The  exit ramp can  be curved,  sometimes  quite sharply. 
The 
exit speed is usually posted. 
Reduce  your speed according to your speedometer,  not to your sense 
of 
motion.  After driving  for any  distance  at higher  speeds,  you  may  tend to 
think  you are going  slower than you actually  are. 
Before  Leaving  on a Long  Trip 
Make sure you’re  ready.  Try to be well rested. If  you must start when  you’re 
not  fresh 
- such as after a day’s work - don’t  plan to make  too many 
miles that  first part 
of the journey.  Wear comfortable  clothing  and shoes  you 
can  easily drive 
in. 
Is your  vehicle ready for a long trip‘? If you keep it serviced  and maintained, 
it’s ready  to go. 
If it needs  service,  have it done before starting  out. Of 
course,  you’ll find experienced and able service  experts 
in GM dealers all 
across North America. They’ll be ready  and willing to help if you need it. 
Here  are  some  things you can check  before  a trip: 
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Windshield Washer Fluid: Is the reservoir  full? Are all windows  clean 
inside  and outside? 
Wiper  Blades: Are they in good shape? 
FueZ,  Engine  Oil,  Other  Fluids: Have you checked all levels? 
Lamps: Are they all working? Are the lenses  clean? 
Tires: They are vitally important to  a  safe, trouble-free  trip. Is the tread 
good enough  for long-distance  driving? Are 
the tires all inflated to the 
recommended  pressure? 
Weather Forecasts: What’s the weather  outlook along your  route? 
Should 
you delay your trip a short time to avoid  a major  storm  system? 
Maps: Do you have  up-to-date  maps? 
Highway  Hypnosis 
Is there  actually  such a condition as “highway hypnosis”?  Or  is  it just  plain 
falling  asleep  at the wheel? Call it highway  hypnosis, lack  of awareness,  or 
whatever. 
There 
is something  about an easy stretch  of road  with  the  same scenery, 
along  with the 
hum of the tires  on the road, the  drone of the engine,  and the 
rush 
of the wind against the vehicle that can make  you sleepy. Don’t  let  it 
happen 
to you! If it does,  your vehicle can leave the road  in less than a 
second, and  you could crash and  be injured. 
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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  (Pj  (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. 
Parking on Hills 
You really should not  park your  vehicle,  with a trailer attached, on a hill.  If 
something  goes wrong, your rig could  start to move. People can  be injured, 
and both your vehicle and  the trailer can  be damaged. 
But 
if you  ever  have  to park your rig  on a hill, here’s how to do it: 
1. 
2. 
3. 
4. 
5. 
6. 
Apply your regular brakes,  but don’t  shift into PARK (P) yet, or in gear 
for  a  manual transmission. 
Have  someone  place chocks  under the trailer wheels. 
When the  wheel chocks  are 
in place, release the regular brakes until the 
chocks  absorb  the load. 
Re-apply  the regular brakes.  Then apply your parking brake, and then 
shift 
to PARK  (P),  or  REVERSE (Rj for  a manual transmission. 
If  you  have 
a four-wheel-drive  vehicle, be sure  the transfer  case is in a 
drive  gear-not  in  NEUTRAL 
(N). 
Release the regular brakes. 
A CAUTION: 
It can  be dangerous  to  get out of your  vehicle  if the shift  lever  is 
not  fully  in 
PARK  (P) with the parking  brake  firmly set.  Your 
vehicle  can rofl. 
If you  have  Ieft the engine  running, the  vehicle can move 
suddenly.  You or others  could  be  injured. 
To be sure  your  vehicle 
won’t  move,  even  when  you’re  on  fairly level ground,  use the 
steps  that follow. 
If you have  four-wheel  drive and your transfer  case is in 
NEUTRAL  (N), your vehicle  will  be  free to roll,  even  if your 
shift lever  is  in 
PARK (P). So, be sure  the  transfer  case is in a 
drive  gear 
- not in NEUTRAL  (N). 
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Cooling System - Diesel  Engines 
When you decide  it‘s safe to  lift  the hood,  here’s what you’ll  see: 
A. Coolant  surge tank pressure  cap 
B. Engine fan(s) 
C. Radiator 
A CAUTION: 
If your  vehicle  has  air conditioning,  the  auxiliary  electric  fan 
under  the  hood  can  start  up  even  when  the  engine  is not  running 
and  can  injure  you.  Keep  hands,  clothing  and  tools  away  from 
any  underhood  electric  fan. 
If the  coolant  inside the coolant  surge tank is boiling,  don’t do anything  else 
until it cools down. 
The  coolant level 
should be 
at or  above 
the 
COLD mark. 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. 
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Engine Oil (Gasoline  Engines) 
It’s a good idea  to  check your  engine oil every time you get fuel. In order to 
get an accurate  reading, the oil must  be  warm  and  the  vehicle must be on 
level ground. 
Turn 
off the engine 
and give  the  oil 
a few 
minutes  to drain back 
into  the oil pan. 
If you 
don’t, the 
oil dipstick 
might  not  show the 
actual level. 
To Check Engine Oil 
Pull  out  the dipstick  and clean it with a paper towel or cloth, then push it 
back in all  the  way.  Remove it again,  keeping  the tip down. 
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When to Add Oil 
If the  oil  is  at  or below  the ADD mark, then you’ll  need to add  some oil. But 
you must use the right  kind.  This part explains  what kind  of oil  to use.  For 
crankcase  capacity,  see  ”Capacities  and Specifications” 
in the Index. 
NOTICE: 
Don’t  add  too  much  oil. If your engine  has so much oil that  the 
oil  level  gets  above  the  upper 
mark that  shows  the  proper 
operating  range,  your  engine  could  be  damaged. 
The  engine  oil filler  cap  is located  on the  driver’s  side  engine  valve cover. 
Just  fill 
it enough  to  put the level  somewhere in the proper  operating range. 
Push the  dipstick all the way back 
in when  you’re  through. 
What Kind of Oil to Use 
Oils of the proper  quality  for  your vehicle can  be identified  by looking  for 
the  “Starburst”  symbol.  The  “Starburst”  symbol indicates that the  oil has 
been  certified  by the American  Petroleum  Institute 
(API), and is prefenced 
for  use  in your  gasoline  engine. 
If 
you change  your  own oil, be sure you  use oil that has the “Starburst” 
symbol  on the  front 
of the oil container.  If  you have your oil changed  for 
you,  be sure  the 
oil put  into  your  engine  is American  Petroleum Institute 
certified  for  gasoline  engines. 
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Engine  Coolant  Heater 
An engine  coolant heater can be a big help if you  have to  park outside in 
very  cold weather, 0°F (-1 8OC) or colder.  If your vehicle has this  option, 
see  “Engine  Coolant  Heater’’  in the Index. 
What  to Do with  Used  Oil 
Did you know  that used  engine oil contains  certain elements  that may  be 
unhealthy  for your  skin and  could even cause  cancer?  Don’t let  used  oil stay 
on  your  skin  for very  long. Clean your  skin and nails with  soap and water, 
or  a  good hand  cleaner. Wash or properly  throw away  clothing  or  rags 
containing  used engine  oil.  (See  the manufacturer‘s  warnings about the use 
and  disposal  of 
oil products.) 
Used oil can  be a real  threat to 
the environment.  If you  change  your own oil, 
be sure  to  drain all free-flowing  oil  from the filter  before  disposal.  Don’t 
ever  dispose 
of oil  by putting it in the  trash,  pouring it on the  ground,  into 
sewers,  or into  streams  or bodies 
of water. Instead.  recycle it by taking it to 
a place that  collects used oil. If you have a problem  properly  disposing of 
your used oil, ask your dealer, a service  station  or a local recycling  center 
for  help. 
Engine  Oil (Diesel  Engines) 
It’s a good idea to check  your  engine oil level every  time  you get fuel.  In 
order  to get  an accurate  reading, the  oil must  be  warm  and 
the vehicle  must 
be  on level  ground. 
Turn off the  engine 
and  give  the oil 
a few 
minutes 
to drain  back 
into the 
oil pan. If you 
don’t,  the oil dipstick 
might  not show the 
actual level. 
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To Check  Engine Oil 
Pull out the dipstick  and  clean it with  a paper towel or a cloth,  then push it 
back  in  all the way. Remove it again, keeping the tip  down. 
When to Add Oil 
If the oil is at or below the ADD line, then you’ll need to add  some oil. But 
you must use  the  right kind. This part explains what  kind of oil to use. For 
crankcase  capacity, see “Capacities  and Specifications” 
in the Index. 
I I 
I NOTICE: I 
Don’t  add  too  much  oil. If your  engine  has so much  oil  that  the 
oil level  gets  above  the  proper  operating  range,  your  engine 
could  be damaged. 
I I 
The  engine oil filler  cap  is  located on a filler  tube  at  the front of the engine. 
Just  fill  it 
enough to put the level somewhere  in the  proper operating range. 
Push the dipstick 
all the way  back in when you’re through. 
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