1993 BUICK ROADMASTER engine

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Anti-Lock Brake System Warning Light
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With anti-lock, this light will go on when you start your
engine and may stay on for several seconds or
so. That’s
normal.
If the light doesn’t come on, have it fixed so it
will be ready to warn you if there is a problem.
If the light stays on or comes on when you’re driving,
stop as soon as possible and turn the key
off. Then start
the engine to reset the system.
If the light still stays on,
or comes on again while you’re driving, your Buiek
needs service. Unless the regular ‘brake system warning
light is also
on, you will still have brakes, but not
anti-lock brakes.
If the regular brake system warning
light is also
on, see “Brake System Warning Light”
earlier
in this part.
The anti-lock brake system warning .light may also come
on when you are driving with
a compact spare. tire, If
this happens, the light means you won’t have anti-lo,ck
until you replace the compact spare ,with
.a fuU-simtire.
If the anti-lock brake system warning light stays
on after
you replace the compact spare with a full-size tire, or if
it comes
on again when you’re driving, your Buick
needs service.
121

Engine Coolant Temperature Warning: ’ J
Light
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This light tells you that ‘
your engine coolant has
ovetheated.
If you have
been operating your vehicle
under normal driving
.conditions, you should pull
off the road, stop your
vehicle and
turn the engine
-off as soon as possible.
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HOT COOLANT CAN BURN YOU-BADLY!
In “Problems on the Road,” this manual shows what to
do. See “Engine Overheating” in the Index.
Engine Coolant Temperature Gage
This gage shows the engine
coolant temperature,
If the
gaie: pointer moves into the
red area, your engine is too
hot!
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That reading means the same thing as the warning light.
It means that your engine coolant has overheated.
If you
have been operating your vehicle under normal driving.
conditions, you should pull off-the road, stop your
vehicle and
turn off the engine as soon as possible.
HOT COOLANT CAN BURN YOU BADLY!
In “Problems on the Road,” this manual shows what to
do. See “Engine Overheating” in the Index.
133

Off Auto
When the system is off; the
.. .. . . ..
When the system is set for
automatic, aitwill come
from the
floor o,utlets,. the
instrument panel outlets or
both. Fan speed
will vary
(unless
a blower LO or HI
'. bukon has been pushed) as
the system gets
to and
m,aintaigs the temperature
'; .setting'you have .selected:
The display will show the selected,temperature and ,
.In cold .weather the system will delay. turning on the'
blower, to avoid blowing cold air.
The length ofthe.
delay depends
on engine coolant temperature, .outside
temperature
and time since the engine was last: stafted.
'. , blower speed.

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the sun may adequately warm your upper body, but your
lower body may not be warm enough.
The Bi-level settbg directs outside air.into your vehicle
in two ways.-Cool air
is directed 'toward your upper
body through the front instrument panel outlets, ,while
slightly warmed
air is directed through the heater outlet
at
your feet.
.The air conditioner compressor operates in all Air
Conditioning positions, and the Defrost position when
.the outside temperature is above
40 OF (4.5 C).
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Ventilation
For mild outside temperatures, when little heating ox ,
cooling is needed, slide the upper lever to Vent, Air will,'
flow through the .instrument panel outlets. Use the air
oudets to turn on, adjust and turn
off the air, flow. Adjust.
the lower lever to control the temperature;
'.
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Heating
When outside temperatures are cold, 8liding:the upper .
lever to Heater and the' lower lever to :Warm will send,
heated air though the heater outlets, 'and-some through
the defroster vents. Vent and Heater arelabeled
economy positions. because the
dr conditioner
compres.sor doesn't run in these..two settings. "This . .
reduces engine load, resulting in impioyed I.. fyd.
economy.
Defrosting
The Defrost setting directs most of the- air through the
defroster vents, and some through.the heater outlets. Use
defrost when you want to remove fog
,6r ice from the
windshield.
133

Rear Window Defogger (Option)
The lines you see on the
rear window warm the glass
to remove fog and ice. Turn'
the control on' to start
warming your window.
After
a few minutes; it will
turn off automatically.
Audio Sysxems
Your Delco@ audio system has been designed to uperate
easily and give years
-of listening pleasure. But you will
get the
most enjoyment out of your system if you
acquaint .yourself with it first. Find out what your
Delcos system can do and how to operate all its
controls, to be sure you're getting the most out
sf the
advanced engineering that went into
it.
FM Stereo
FM stereo will give you the best sound. But FM signals
will reach only about
10 to 40 miles (16 to 65 km). And,
tall buildings or hills can interfere with FM signals, causing the
sound to come and go.
AM
The range for most AM stations is greater than for FM,
especially at night. The longer range, however, can
cause stations to interfere with each other.
AM can pick
up noise from things like storms and power lines. Try
reducing the treble
to reduce this noise.

Riding” your brake
overheat to the point that they won’t work well,
You might not be able to stop your vehicle
it
time to avoid an accident. If you “ride” your
brakes, they will get
so hot they will require a 1st
of pedal force to slow you down. Avoid “ridil
the brakes.
If you keep pace with the traffic and al1,ow realistic
followirig distance.s, you will eliminate a lot
of
unnecessary braking. ‘That means better braking and
longer brake
life.
If your engine ever stops while you’re driving, brake
normally .but don’t
pump your brakes. If you do, the
pedal may get harder to push down.
If your engine
stops, you will still have some power brake. assist.
But you will use it when you brake. Once.the power
assist
is used up, it-may take longer to stop and the
brake pedal
will be harder to push.
165

If your brake pedal goes down farther man normal, your
rear drum brakes may need adjustment. Adjust them by
backing
up and firmly applying the brakes a few times.
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Braking in Emergencies I
Use your anti-lock braking sysKem when you need to. .
With anti-lock, you can steer and brake at the same time.
In many emergencies, steering can help you .more. than
even the very best braking.
Steering
Power Steering
If you lose power steering a ssist becau Lse
the engine
stops or the system fails to function, you can steer but
it
will take much more effort.
Steering Tips
Driving on Curves
It’s important to take- curves at a reasonable speed.
A lot of the “driver lost control” accidents mentioned on
the news happen on curves. Here’s why:
Experienced driver or beginner, each
of us is subject to
the same laws of physics. when driviqg on curves. The
traction
of the tires agairist the road s.urface makes it
169

Driving on steep hills or mountains is different from
driving in
flat or rolling terrain.
' A CAUTION:
If you don't shift down, your brakes could get
o hot that they wouldn't work well. You wou.,
..len have
poor braking or even none going
. down a hill. You could crash. Shift dowr tn Ifit
,our engine assist vnur brakes on a stec,
down hill slope.
If you drive regularly in steep country, or if you're - - -
planning-to visit there, here are some tips that can make
your
trips safer and more enjoyable.