1996 GMC SIERRA radiator cap

Cooling System -- Gasoline Engines
When you decide it's safe to lift the hood, here's what
you'll see:
A. Coolant Recovery Tdnk
B. Radiator Pressure Cap
C. Engine Fan(s)
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 recovery tank is boiling,
don't do anything else
until it cools down.
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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.
5-16
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How to Add Coolant to the Radiator
I. 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.
j
If you hear a hiss, wait for that to stop. A hiss means
there is
still some pressure left.
5-17
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3. Fill the radiator with the
proper mix, up to the
base of the filler neck. I
4. Then fill the coolant recovery tank to the
COLD mark.
5. Put the cap back on the coolant recovery tank, but
leave the radiator
pressure cap off.
5-18
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6. Start the engine and let it
run until you can feel the
upper radiator hose
getting
hot. Watch out
for the engine fan(s).
7. By this time the coolant level inside the radiator
filler neck may be lower.
If the level is lower, add
more of the proper mix through the filler neck until
the level reaches the base of the filler neck.
I
8. Then replace the pressure cap. At any time during
this procedure if coolant begins to flow out of the
filler neck. reinstall the pressure
cap. Be sure the
arrows
on the pressure cap line up like this.
5-19
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A. Battery
B. Air Cleaner
C. Radiator Cap
D. Coolant Recovery Tmk
E. Air Filter Restriction Indicator
E Engine Oil Dipstick
G. Automatic Transmission Dipstick
H. Fan
I. Power Steering Fluid Reservoir
J. Engine Oil Fill
K. Brake Fluid Reservoir
L. Windshield Washer Fluid Reservoir
M. FuseIRelay Center
N. Storage Compartment
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“VORTEC” 7400 Engine
I
A. Battery
B. Coolant Recovery Tank
C. Air Cleaner
D. Radiator Cap
E. Air Filter Restriction Indicator
E Engine Oil Dipstick K. Brake Fluid Reservoir
G. Automatic Transmission Dipstick L. Storage Compartment
H. Engine Oil Fill M. Windshield Washer
I. Fan Fluid
Reservoir
J. Power Steering Fluid Reservoir Ne Fuse/RelaY Center
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Adding Coolant
If you need more coolant, add the proper mix ut tho
cYN-hnt Ix~c'olY!l'\: tmk.
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. With the coolant recovery tank, you will
almost never have to add coolant at the radiator. Never turn the radiator pressure cap
-- even a
little
-- when the engine and radiator are hot.
Add coolant mix at the recovery tank, but be careful not
to spill it.
/rl CAUTION:
r -4
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.
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