Page 274 of 404

Downloaded from www.Manualslib.com manuals search engine Engine Coolant
The cooling s stem in your vehicle is filled with
DEX-COOL engine coolant. This coolant is designed
to remain
in your vehicle for 5 years or 150,000 miles
(240 000 km) whichever occurs first, if you add only
DEX-COOL’ extended life coolant.
The following explains your cooling system and how to
add coolant when it
is low. If you have a problem with
engine overheating or
if you need to add coolant to your
radiator, see “Engine Overheating” in the Index.
d
A 50/50 mixture of water and DEX-COOL@
coolant will:
0 Give freezing protection down to -34°F (-37°C).
0 Give boiling protection up to 265 “F (1 29°C).
0 Protect against rust and corrosion.
0 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
only
DEX-COOL@ (silicate-free) coolant.
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.
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Page 275 of 404

Downloaded from www.Manualslib.com manuals search engine What to Use
Use a mixture of one-half clean water (preferably
distilled) and one-half
DEX-COOL@ coolant 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.
CAUTION:
Adding only plain water to your cooling syste.m
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@ coolant.
NOTICE:
If you use an improper coolant mix, your engine
could overheat and be badly damaged. The
repair cost wouldn’t be covered by your
warranty. Too much water in the mix can freeze
and crack the engine, radiator, heater core and
other parts.
[f you have to add coolant more than four times a year,
lave your dealer :ck your cooling system.
NOTICE:
If you use the proper coolant, you don’t have to
add extra inhibitors or additives which claim to
improve the system. These can be harmful.
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Page 276 of 404
Downloaded from www.Manualslib.com manuals search engine Checking Coolant
5.7L Engine Only
When your engine is cold, check the dipstick on the cap
of the coolant recovery tank. The coolant level should
be at
COLD, or a little higher. When your engine is
warm, the level on the dipstick should be up to HOT,
or a little higher.
If this light comes on, it
means you’re low on
engine coolant.
Adding Coolant to the Recovery Tank
If you need more coolant, add the proper DEX-COOL’
coolant mixture at the coolant recovery tank, but only
when your engine is cool.
If the tank is very low or
empty, also add coolant to the radiator. See “Engine
Overheating” in the Index for information.
Page 277 of 404

Downloaded from www.Manualslib.com manuals search engine A CAUTION:
Turning the radiator pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids
to blow out and burn you
badly. Never turn the pressure cap
-- even a
little -- when the engine and radiator are hot.
Add coolant mixture at the recovery tank, but be careful
not to spill it.
'
A CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and
it will burn if the engine parts are hot
enough. Don't spill coolant on a hot engine.
Radiator Pressure Cap (All Engines)
NOTICE:
Your radiator cap is an 18 psi (124 kPa)
~ pressure-type cap and must be tightly installed to
~ prevent coolant loss and possible engine damage
from overheating. Be sure the arrows on the cap
line up with the overflow tube on the radiator
filler neck.
When you replace your radiator pressure cap, an AC@
cap
is recommended.
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.
6-31
Page 353 of 404
Downloaded from www.Manualslib.com manuals search engine Short TripKity Maintenance Schedule
100,000 Miles (166 000 km)
0 Inspect spark plug wires.
0 Replace spark plugs.
An Emission Control Service.
An Emission Control Service.
0 If you haven’t used your vehicle under
severe service conditions listed previously
and, therefore, haven’t changed your
automatic transmission fluid, chanee both
the fluid and filter.
U
150,000 Miles (240 000 km)
0 Drain, flush and refill cooling system
(or every
60 months since last service,
whichever occurs first). See “Engine
Coolant” in the Index for what
to use.
Inspect hoses. Clean radiator, condenser,
pressure cap and neck. Pressure test
cooling system and pressure cap.
An Emission Control Sewice.
I I
DATE ACTUAL MILEAGE
I
SERVICED BY: DATE SERVICED BY: ACTUAL MILEAGE
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Page 366 of 404
Downloaded from www.Manualslib.com manuals search engine Long Trip/Highway Maintenance Schedule
100,000 Miles (166 000 km)
0
cl
0
Inspect spark plug wires.
An Emission Control Service.
Replace spark plugs.
If you haven’t used your vehicle under
severe service conditions listed previously
and, therefore, haven’t changed your
automatic transmission fluid, change both
the fluid and filter.
An Emission Control Service.
150,000 Miles (240 000 km)
0 Drain, flush and refill cooling system
(or every
60 months since last service,
whichever occurs first). See “Engine
Coolant” in the Index for what to use.
Inspect hoses. Clean radiator, condenser,
pressure cap and neck. Pressure test
the cooling system and pressure cap.
An Emission Control Service.
r I I I
DATE
SERVICED BY ACTUAL MILEAGE
7-42
Page 367 of 404

Downloaded from www.Manualslib.com manuals search engine Part B: Owner Checks and Services
Listed below are owner checks and services which
should be performed at the intervals specified to help
ensure the safety, dependability and emission control
performance
of your vehicle.
Be sure
any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown in
Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel fill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. See “Engine Oil’’ in the Index for
further details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL@
coolant mix if necessary. See “Engine Coolant” in the
Index for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the
windshield washer tank and add the proper fluid if
necessary. See “Windshield Washer Fluid” in the Index
for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inflated to the correct pressures. See
“Tires” in the Index for further details.
Cassette Deck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See “Audio Systems” in the
Index for further details,
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Page 373 of 404

Downloaded from www.Manualslib.com manuals search engine Part D: Recommended Fluids and
Lubricants
NOTE: Fluids and lubricants identified below by name,
part number or specification may be obtained from your
GM dealer.
USAGE
Engine Oil
Engine Coolant
Coolant
Supplement Sealer
FLUIDLUBRICANT
Engine oil with the American
Petroleum Institute Certified For
Gasoline Engines “Starburst”
symbol
of the proper viscosity. To
determine the preferred viscosity
for your vehicle’s engine,
see
“Engine Oil” in the Index.
50/50 mixture of clean water
(preferably distilled) and use only
GM Goodwrench@ DEX-COOL@
or Havoline@ DEX-COOL@
coolant. See “Engine Coolant” in
the Index.
GM Part No. 3634621 or
equivalent with a complete flush
and refill.
USAGE
Hydraulic Brake
System
Hydraulic Clutch
System
Power Steering
System
Manual
Transmission
Automatic
Transmission
Key Lock
Cylinders
Clutch Linkage
Pivot Points
FLUIDLUBRICANT
Delco Supreme 11 @ Brake Fluid
(GM Part No. 12377967 or
equivalent DOT-3 brake fluid).
Hydraulic Clutch Fluid (GM Part
No. 12345347 or equivalent
DOT-3 brake fluid).
GM Power Steering Fluid
(GM Part No. 1052884
- 1 pint,
1050017
- 1 quart, or equivalent).
DEXRONO-I11 Automatic
Transmission Fluid.
DEXRON@-I11 Automatic
Transmission Fluid.
Multi-Pur ose lubricant,
Superlube
% (GM Part
No. 12346241
or equivalent).
Engine oil.
7-49