GMC SIERRA 1993 Owners Manual

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Features & Contmls
Instrument CIuster
Your instrument cluster is designed to let you know at a glance how your
vehicle is running. You’ll know how fast you’re going, ab\
out how much fuel
you have and many other things you’ll need to know to driv\
e safely and economically.
Tachometer Cluster
If you have the tachometer cluster, it looks different but will t\
ell you
everything the standard cluster does, with the addition
of displaying your
engines revolutions per minute (rpm).
Speedometer and Odometer
K2322
Your speedometer lets you see your speed in both miles per hour (\
mph) and
kilometers per hour (kmlh). Your odometer shows how far your vehicle has
been driven, in either miles (used in the U.S.) or kilometers (used in
Canada).
If you have the Sport Performance Model (RPO B4U), your speedome\
ter
reading will
go to 110 mph (1 80 km/h).
Tamper-Resistant Odometer
Your odometer is tamper-resistant. The odometer will show silver line\
s
between the numbers
if someone tries to turn it back.
You may wonder what happens
if your vehicle needs a new odometer
installed.
If the new one can be set to the mileage total of the old odometer,
then it must be. But
if it can’t, then it’s set at zero, and a label must be p\
ut
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on the driver’s door to show the old mileage reading when the new odometer
was installed.
Trip Odometer
1
K2323
The trip odometer can tell you how far your vehicle has been \
driven since
you last set the trip odometer
to zero.
To reset the trip odometer, fully press the reset button located \
near the
readout.
If the reset button is not fully pressed, the trip odometer may \
not go
all the way back to zero. If it doesn’t, you may have to press the reset
button again
to reset the readout to zero.
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Features & Controls
Tachometer
If you have a tachometer, it displays the engine speed in revolut\
ions per
minute (rpm).
If you have the Sport Performance Model (RPO B4U), your tachometer
reading will go
to 6,000 RPM.
'I I Do not operate the engine with the tachometer in the red area, your
engine
or other parts could be damagec' I
Damage to your engine or vehicle caused by operating the engine in 1
red area isn't covered by your vehicle warranty.
Warning and lndicator Lights
This section describes the warning lights and gages that are o\
n your vehicle.
The pictures
will help you locate them.
Warning lights and gages can signal that something is wrong be\
fore
it
becomes serious enough to cause expensive repair or replacement. Paying
attention
to your warning lights and gages could also save you or others from
injury.
Warning lights go on when there may be or
is a problem with one of your
vehicle's functions.
As you will see in the details on the next few pages,
some warning lights come on briefly when you turn the ignition\
key just
to let
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you know they’re working. If you are familiar. with this section, you should not
be alarmed when this happens.
Gages can indicate when there may be or is _a problem with one of your
vehicle’s functions. Often gages and warning lights work together
to let you
know when there’s a problem with your vehicle.
When one of the warning lights comes on and stays on when yo\
u are driving, or when one of the gages shows there may be a probl\
em, check the
section that tells you what to do about it. Please follow the\
manual’s advice.
Waiting to do repairs can be costly-and even dangerous.
So please get to
know your warning lights and gages. They’re a big help.
Brake System. Warning Light
BRAKE
. , K2325
Your vehicle’s hydraulic brake system is divided into two parts. If ,one‘ part
isn’t working, the other part can still work and stop you. \
For good braking,
though, you need both- systems working well.
Your vehicle also has rear-wheel antilock brakes.
If the warning light goes on,
there could be a brake problem with either your regular or rear wheel antilock
brakes, or both. Have your brake system inspected right away.
This light should come on as you start the vehicle.
If it doesn’t come on
then, have
it fixed so it will be ready to warn you if there’s a problem.
This light
will also come on when you set your parking brake, and will stay
on
if your parking brake doesn’t release fully. If it stays on after your parking
brake is fully released,
it means you may ‘have a brake problem. If the light
comes on while driving, pull
off the road and stop carefully. You may notice
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Features & Controls
that the pedal is harder to push. Or, the pedal may go closer to the floor.\
It
may take longer to stop. If the light is still on, have the vehicle towed for
service. (See “Towing Your Vehicle” in the Index.)
CAUTION
* Your brake system may not be working properly if the brake warning
light is on. Driving with the brake warning light on can lead\
to an
accident.
If the light is still on after you’ve pulled off the road and
stopped carefully, have
+hq vehicle towed for service.
“WATER IN FUEL” Light
WATER
IN
FUEL I
-l PB010
This light will come on to warn you if there is too much water in the diesel
fuel system. For more information on how this light works, see\
“Diesel Fuel
Requirements and Fuel System” in the Index.
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GLOW PLUGS Light
I--
GLOW
PLUGS
K2337
Your diesel engine has a special starting system. An instrument\
panel GLOW
PLUGS light tells you when the engine is ready to be started. It is at the
upper right
of your cluster. For more details, see “Starting Your Diesel
Engine” in the Index.
Low Coolant Warning Light
LOW
K2327
If you have a diesel engine, you have a low coolant warning ligh\
t. If this light
comes on, your system is
low on coolant and the engine may overheat. See
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Features & Controls
“Engine Coolant’’ in the Index and have your vehicle s\
erviced as soon as
you can.
Charging System Light
K2328
The red charging system light is located at the upper right hand corner of
your instrument cluster. It should come on briefly when you turn on the
ignition, before starting the engine, as a check to show you it is working.
After the engine starts, the light should
go out. If it stays on, or comes on
while you are driving, you may have a problem with your elect\
rical charging system. It could indicate that you have a loose alternator drive belt, or\
that
you have some other electrical problem. Have it checked right away. Driving
while this light is on could drain your battery.
If you must drive a short distance with the light on, be certain to turn off all
your accessories, such as the radio and air conditioner.
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