1993 GMC SIERRA Owners Manual

1
PO244
2. Then keep turning the pressure cap, but now push down as you turn it.
Remove the pressure cap.
K2341
3. Fill the radiator with the proper mix, up to the base of the filler neck.
4. Then fill the coolant recovery tank to COLD.
5. Put the cap back on the coolant recovery tank, but leave the \
radiator
pressure cap
off.
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Prob/ems on the Road
t
e;
K2550
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 m\
ay be
lower.
If the level is lower, add more of the proper mix through the f\
iller
neck until the level reaches the base of the filler neck.
K2515
8. Then replace the pressure cap. Be sure the arrows on the pressure cap
line up like this.
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Engine Fan Noise
This vehicle has a clutched engine cooling fan. When the clutch is engaged,
the fan spins faster to provide more air to
cool the engine. In most every day
driving conditions the clutch is not engaged. This improves fue\
l economy and
reduces fan noise. Under heavy vehicle loading, trailer towing andlor high
outside temperatures, the fan speed increases when the clutch e\
ngages.
So
you may hear an increase in fan noise. This is normal and should not be
mistaken as the transmission slipping or making extra shifts. It is merely the
cooling system functioning properly. The fan will
slow down when additional
cooling is not required and the clutch disengages.
You may also hear this fan noise when you start the engine. It will go away
as the fan clutch disengages.
If a Tire Goes Fiat
It’s unusual for a tire to “blow out” while you’re driving, especially if you
maintain your tires properly. If air goes out of a tire, it’s much more likely to
leak out slowly. But
if you should ever have a “blowout,” here are a few tips
about what to expect and what to do:
If a front tire fails, the flat tire will create a drag that pulls the vehicle toward
that side. Take your foot off the accelerator pedal and grip \
the steering wheel
firmly. Steer to maintain lane position, then gently brake to a stop well out of
the traffic lane.
A rear blowout, particularly on a curve, acts much like a skid and may
require the same correction you’d use in a skid. In any rear blowout, remove
your foot from the accelerator pedal. Get the‘vehicle under control by steering
the way you want the vehicle to go. It may be very bumpy and noisy, but
you can still steer. Gently brake to a stop, well off the road
if possible.
If your tire goes flat, the next part shows how to use your jacking equipment
to change a flat tire safely.
Changing a Flat Tire
If a tire goes flat, avoid further tire and wheel damage by driv\
ing slowly to a
level place. Turn on your hazard warning flashers.
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Pmb/ems on the Road
vnu I IVII
A Changing a tire can cause an injury. The vehicle can slip off the iac
and roll over you or other people. You and they could be badly
injured. Find
a level dace .. , to ,dbanr voy&&g. To heh Drevent tt-
fehicle from m
E -,>1-
-ut the shift lever in P (P
hift a manual transmission to 1 (First) ur r never 3.
To be even more certain the vehicle won’t move, you can put c\
hocks
at the front and rear of the tire farthest away from the one being
changed. That would be the tire on the other side of the vehicle, at
the opposite end.
.
AM545004
The following steps will tell you how to use the jack and ch\
ange a tire.
The equipment you’ll need is behind the passenger’s seat. \
Your spare tire is
stowed under the truck or behind the driver on the side of the truck bed.
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JACKING TOOL STORAGE
(TWO AND
FOUR
DOOR MODELS)
TOOL
NUT
-* RETAINER
&# EXTENSION
WRENCH
JACK
& TOOL
JACKING TOOL STORAGE
WHEEL
JACKING (CHASSIS
WRENCH
RATCHET
I UUL s I UHAUt
CAB MODELS) JACK JACK
& TOOL
COVER
EXTENSION
TOOL RETAINER
JACK
& TOOL
STORAGE BOX
PB008
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Problenrs on the Road
Jack Storage
Your jack and wheel ratchet are behind the passenger seat. Turn. th\
e wing
nut counterclockwise and remove the cover
if there is one.
Spare Tire
-
i
K2517
Your spare tire is either underneath the rear of the vehicle, or mounted to the
inside of the bed on the driver’s side.
If you have a chassis cab, refer to the
information from the body supplier/installer.
The spare tire
is a full size tire, like the other tires’ on your vehicle.
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Underbody Carrier
I CAUTION
To help avoid personal injury and property damage, never remove or
restow a tire fromho a stowage position under the vehicle while the
vehicle is supported by a jack. Always tighten the tire fully against
the underside of the vehicle when restowing.
To Remove the Spare Tire
a
K2535
The ratchet has an UP marking and a DOWN marking.
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Problems on the Road
"I
K2536
Attach the ratchet, with the DOWN marking facing you, to the wheel wrench.
Put the chisel end
of the wheel wrench on an angle through the hole in the
rear bumper. Be sure the wheel wrench connects into the hoist shaft.
Turn the ratchet to the left to lower the spare tire. Keep turning the ratchet
until the spare tire can be pulled out from under the vehicle\
.
K2537
When the tire has been lowered, tilt the retainer at the end of the cable and
pull
it through the wheel opening.
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