1993 BUICK ROADMASTER heater

Engine Block Heater (Canada Only)
In very cold weather, '0 OF (- 18 C) or colder,. the engine . ,
block heater can help. You'll get easier starting and
better. fuel economy during engine warm-up.
To use the block heater:
1. Turn off the engine.
2. Open the hood and'unwrap the electrical cord.
3. Plug it into a normal, grounded 110 volt outlet.
L
77

.. 'Your Buick may have this Comfort Control. System. , .. . .
. Your Bui&'s flow-through ventilation system supplies
outside air info the vehicle when it is,moving. When the
heater or air c.onditioning fan is running, outside .air will
also enter the-vehicle.
.. ,.
Fan Speeds:
The fan- control is used to select the speed you' want the
blbwer to contrdl the:& flow.
B/L (Bi-level) :
This setting is designed for use on smy days'whexe the
air is only moderately warm or.-c6c?l. On days like these,

i
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).
R
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;
'.
.. .
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

Run your engine only as long as you must. This saves
fuel. When you
run the engine, make it go a little faster
than just idle. That is, push the accelerator slightly. This:
uses less fuel for the heat that you get and it keeps the
battery charged.
You will need a well-charged battery to
restart the vehicle, and possibly for signaling later
on
with your headlights. Let the heater run for awhile.
Then, shut the engine
off and close the window almost
all the way to preserve the heat. Start the engine again
and repeat this only when you feel really uncomfortable
from the cold. But do
it as 'little as possible. Preserve the
fuel
as long as you can. To help keep warm, you can get
out of the vehicle and
do some fairly vigorous exercises
every half hour or
so until help comes.
Towing, a Trailer
/! CAUTION-
If you don't use the correct equipment and drive
properly, you can lose control when you
pull a
trailer.
For example, if the trailer is too heavy,
I the brakes may not work well - or even at all,
You and your passengers could be seriously'
injured. Pull
a trailer only if you have followed
I the steps in this section.

It’s below freezing outside and most trips are less:
than
10 miles (16 km).
. The engine is -at low .speed most of the time (as in
door
tp door delivery, or in stop-and-go traffic).
You tow a trailer often.
Most trips are through dusty places.
If -any one of these is true for your vehicle, then you
need-to change
your oil.and filter every 3,000 miles
(5 000 km) or, 3 months - whichever comes first.
If none of them is true, change the oil every 7,500 miles
(12 -500 km) or 12 months - whichever comes first.
Change the filter at the first oil change and
at every
other oil change after that.
Engine Block Heater: An engine block heater can be a
big help if-you have
to park outside in very cold
weather,
-20 * F (-29 C] or .colder. If your vehicle has
this option, see
“Engine Block Heater” in the Index.
What to Do with Used Oil:
Used engine oil contains things that have
caused skin cancer in laboratory animals.
Da
let used oil stay on your skin for very long
Clean your skin and nails with soap and water,
away clothing or rags containing used engine
0
lr a good hand cleaner. Wash or properly throw
I
..
Used oil can be a real threat to the environment. If you
change your
own oil, be sure to drain all free-flowing oil
Erom the filter before disposal. Don’t ever dispose of oil
by pouring
it on the ground, into sewers, or into streams
or bodies of water. Instead, recycle it by taking it.to a
place that collects used oil. If you have a problem
properly disposing of your used oil, ask your dealer, a
service station or
a local recycling center for help.
252

.Gasoline ....................................... 243
Gasoline Tank. Filling Your
........................ 245
Gate Ajar Light
................................. 124
Gear Positions
................................... 78
Glass Cleaning
.................................. 282
Graphic Symbols
................................. 12
Guard Against Theft
.............................. 72
Guide en Francais
................................. 2
Halogen
Bulbs ................................. 265
Hazard Warning Flasher ........................... 204
Haze. Driving in ................................. 180
Headlamp Bulb Replacement
....................... 265
Headlight High-Low Beam Switch
. : ................. 90
Head Restraints ................................... 18
Heater
..................................... 128.. '13 1
Highway Hypnosis ............................... 185
Hill and Mountain Roads
.......................... 186
Hills. Parking on
.............. : ................. 188
Hitches. Trailer
.................................. 198
Holding
a Baby in Your Car ......................... 46
Hood. Opening the
............................... 247
Horn
........................................... 88
Hot Coolant Warning Light
........................ 122
Hot Engine. Safety Warnings About
................. 216
Hydroplaning
................................... 179
Ice. Driving
on ................................. 192
Identification Label. Service Parts
................... 287
Identification Number. Vehicle
..................... 287
Hearing Impaired. Customer Assistance
for
........... 320
High Speed Shifting When Your Engine
is Running ...... 79 Idling
Your Engine
................................ 86
If You're Stack: In Sand. Mud. Ice or Snow ........... 239
Ignition Key Positions
............................. 74
Indicator. Turn Signal
.............................. 89
Indicators. Disc Brake Wear
....................... 168
Infant Restraint
.................................. -47
Inflation. Tire
................................... 272
Inside Mirror
.................................... 102
Inspection. Tire
................................. 273
Instrument Panel
................................ 113
Interior Cleaning
............ *- .................. -280
Interlock. Brake-Transmission
Shift ............... 78. 84
Introduction. How
to Use this Manual ................. 10
Jack. Tire ..................................... 224
Jacking Up the Car
............................... 232
Jump Starting
................................... 206
Keys
.......................................... 62
Keyless Entry System. Remote
...................... 69
Kilometer Indicator
.............................. 114
Label. Service Parts Identification
.................. 287'
Lane Change Indicator
............................. 89
Lap-Shoulder Belt Usage by Children
.................. 56
Leaving Your Vehicle ............................ 65. 84
Light Bulbs. Replaceable
........................... 294
Light. Safety Belt
.............................. 21. 27
Light. Turn Signal Indicator
......................... 89
Indicators. Warning Lights. Gages
& ................. 114
LapBelt
........................................ 41