Page 236 of 402

Downloaded from www.Manualslib.com manuals search engine A CAUTION:
I
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 mixture will. Your vehicle’s coolant
warning system is set for the proper coolant
mixture. With plain water or the wrong mixture,
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 mixture of clean water and
DEX-COOL@ coolant.
I NOTICE: I
In cold weather, water can freeze and crack the
engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
I /1 CAUTION:
I
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.
When the coolant in the coolant recovery tank is at
FULL COLD, start your vehicle.
5-18
Page 237 of 402
Downloaded from www.Manualslib.com manuals search engine If the overheat warning continues, there’s one more
thing you can try.
You can add the proper coolant
mixture directly
to the radiator, but be sure the cooling
system is cool before you do it.
A CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the radiator
pressure cap
-- even a little -- they can come out
at high speed. Never turn the cap when the
cooling system, including the radiator pressure
cap, is hot. Wait for the cooling system and
radiator pressure cap to cool if you ever have to
turn the pressure cap.
5-19
Page 238 of 402
Downloaded from www.Manualslib.com manuals search engine How to Add Coolant to the Radiator
(3800 V6 Engine Only)
I NOTICE:
Your engine has a specific radiator fill procedure.
Failure to follow this procedure could cause your
engine to overheat and be severely damaged.
1. You can remove the radiator pressure cap when the
cooling system, including the radiator pressure cap
and upper radiator
hose, is no longer hot. Turn the
pressure cap slowly counterclockwise until it first
stops. (Don't press down while turning the
pressure cap.)
If you hear a hiss, wait for that to stop. A hiss means
there
is still some pressure left.
2. Then keep turning the pressure cap, but now push down
as you turn it. Remove the pressure cap.
5-20
Page 240 of 402
Downloaded from www.Manualslib.com manuals search engine 5. Then fill the coolant recovery tank to FULL COLD.
6. Put the cap back on the coolant recovery tank, but
leave the radiator pressure cap
off.
7. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fans.
8. By this time, the coolant level inside the radiator
filler neck may be lower.
If the level is lower, add
more
of the proper DEX-COOL@ coolant mixture
through the filler neck until the level reaches the
base of the filler neck.
5-22
Page 242 of 402
Downloaded from www.Manualslib.com manuals search engine 1. You can remove the radiator pressure cap when the
cooling system, including the radiator pressure cap
and upper radiator hose, is no longer hot. Turn the
pressure cap slowly counterclockwise until it first
stops. (Don’t press down while turning
the
pressure cap.)
If you hear a hiss, wait for that to stop. A hiss means
there is still some pressure left.
2. Then keep turning the pressure cap, but now push
down as you turn it. Remove the pressure cap.
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.
5-24
Page 268 of 402
Downloaded from www.Manualslib.com manuals search engine When you open the hood of the 3800 V6 Engine you’ll see:
A. Engine Coolant Reservoir
€3. Battery
C. Radiator
Fill Cap
D. Engine Oil Fill Cap
E. Automatic Transmission
Dipstick
(If Equipped)
E Windshield Washer Reservoir
G. Engine Cooling Fans
H. Air Cleaner
I. Power Steering Reservoir
J. Engine Oil Dipstick
K. Brake Fluid Reservoir
L. Clutch Fluid Reservoir
(If Equipped)
Page 269 of 402
Downloaded from www.Manualslib.com manuals search engine When you open the hood of the 5.7L V8 Engine you'll see:
A. Engine Coolant Reservoir
B. Battery
C. Engine Oil Dipstick
D. Engine Oil Fill Cap E.
Automatic Transmission
Dipstick
(If Equipped)
E Engine Cooling Fans
G. Windshield Washer Reservoir
H. Air Cleaner
I. Power Steering Reservoir
J. Brake Fluid Reservoir
K. Clutch Fluid Reservoir
(If Equipped)
Page 284 of 402

Downloaded from www.Manualslib.com manuals search engine How to Check
The proper fluid should be added if the level is below
the STEP mark on the reservoir. See the instructions
on the reservoir cap.
Rear Axle
When to Check and Change Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant and when to change
it.
See “Scheduled Maintenance Services” in the Index.
How to Check Lubricant
If the level is below the bottom of the filler plug hole,
you’ll need to add some lubricant. Add enough lubricant
to raise the level to the bottom of the filler plug hole.
What to Use
Standard Differential
Use Axle Lubricant (GM Part No. 12345977) or SAE
80W-90 GL-5 gear lubricant.
Limited-Slip Differential
To add lubricant when the level is low, use Axle
Lubricant (GM
Part No. 12345977). To completely refill
after draining, add
4 ounces (1 18 ml) of Limited-Slip
Differential Lubricant Additive
(GM Part No. 1052358).
Then fill to the bottom of the filler plug hole with Axle
Lubricant (GM
Part No. 12345977).
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.
B
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.
6-26