engine GMC SIERRA 1993 Owners Manual

What to Do with Used Oil:
I
I PAUTION
Used engine oil contains things that have caused skin cancer i\
n I
laboratory animals. Don’t let used oil stay on your skin fo\
r very long.
clnan your skin and nails with soap and water, or a good hand
c,,aner. Wash or properly throw away clothing or rags containing
used engine oil.
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 from the filter before disp\
osal. Don’t ever
dispose of
oil by putting it in the trash, 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.
Air Cleaner
I I
PO216
Refer to the Maintenance Schedule to determine when to replace \
the air
cleaner filter on diesel engines and the air cleaner filter an\
d crankcase ventilation filter on gasoline engines. See “Scheduled Mainten\
ance Services’’
in the Index.
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Service & Appearance Care
I
IC Operating the engine with the air cleaner off can cause you or others
to be burned. The air cleaner not only cleans the air,
it stops flame
if the engine backfires. If it isn't there, and the engine backfires, you
could be burned. Don't drive with it
off, and be careful working on
the engine with the air cleaner
off.
If the air cleaner is off, a backfire can cause a damaging engine fire. And,
dirt can easily get into your engine, which will dan le
it. Alway! 3 tl
air cleaner in place when you're driving.
To remove the air cleaner filter on a gas engine, turn the wing nuts
counterclockwise. Remove the cover and change the filter.
fi 31 Fnning 6.5L Engine
K2151
On a 6.2L diesel engine there are two wing nuts. On a 6.5L \
diesel engine, unhook the clips.
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Automatic Transmission Fluid
When to Check and Change:
A good time to check your automatic transmission fluid level is when the
engine oil is changed. Refer
to the Maintenance Schedule to determine when
to change your fluid. See "Scheduled Maintenance Services" in the \
Index.
How to Check:
Because this operation can be a little difficult, you may choose to have this
done at a General Motors dealership Service Department.
If you
do it yourself, be sure to follow all the instructions here, or you could
get a false reading on the dipstick.
I Too much or too little fluid can damage your transmission. Too much can
nean that some of the fluid could come out and fall on hot engine parts,
itarting
a fire. Be sure to get an accurate reading if you check your
ransmission ftuid.
Wait at least
30 minutes before checking the transmission fluid level if you
have been driving:
When outside temperatures are above 90°F (32°C).
At high speed for quite a while.
In heavy traffic-especially in hot weather.
While pulling a trailer.
To get the right reading, the fluid must be at normal operating temperature,
which is 180°F
to 200°F (82°C to 93°C).
To check the transmission fluid hot: Get the vehicle warmed up by driving
about
15 miles (24 km) when outside temperatures are above 50°F (1 0°C). If
it's colder than
50°F (lO°C), drive the vehicle in D (3rd gear) until the engine
temperature gage moves and then remains steady for ten minutes. Then
follow the hot check procedures.
To check transmission fluid cold: A cold check is made after the vehicle
has been sitting for eight hours or more with the engine
off and is used only
as a reference. Let the engine run at idle for five minutes
if outside
temperatures are 50°F (10°C) or more.
If it's colder than 50°F (lO"C), you
may have
to idle the engine longer. A hot check must follow when fluid is
added during a cold check.
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Senrr'ce & bmearance Care
To check the fluid hot or cold:
Park your vehicle on a level place.
Place the shift lever in P (Park) with the parking brake applied.
With your foot on the brake pedal, move the shift lever through each
gear range, pausing for about three seconds in each range. Then,
position the shift lever in
P (Park).
Let the engine run at idle for three minutes or more.
Then, without shutting off the engine, follow these steps:
1. Flip the handle up and then pull out the dipstick and wipe it with a
clean rag or paper towel.
PO229
2. Push it back in all the way, wait three seconds and then pull it back out
again.
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*
Senrice & Appearance Care
Manual Transmission Huld
When to Check:
the fluid in your manual transmission doesn't require changing.
How to 'Check:
Because this operation can be a :little difficult, you may cho\
ose to have this
done at your dealership Service Department.
t A good time to have it checked is when .the engine oil is changed. However,
If you do it yourself, be sure to follow' all the instructions here, or you could
get a false reading..
. . .. . . ... -
Too much or too little fluid can damage your transmission. Too much can
mean that some of the fluid could come out and fall on hot engine parts,
starting a fire. Be sure
to get an accurate reading if you check your
transmission fluid.
Check the fluid level only when your engine is
off, the vehicle is parked on a
level place and the transmission is cool enough for you to re\
st your fingers
on the transmission case.
Then, follow these steps:.
~ ~~ ~
1. Remove the filler plug.
K2471
2. Check that the lubricant level is up to the bottom of the filler- plug hole.
3. If the fluid level is good, install the plug and be sure it is fully seated. If
the fluid level is low, add more fluid as described in the next steps.
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Service & Appearance ,Care
Engine Coolant
r
PO593
The following explains your cooling system and how to add cool\
ant when it is low.
If you have a problem with -engine overheating, see “Engine
Overheating” in the Index.
The proper coolant for your vehicle will:
Give freezing protection down to -34°F (-37°C).
Give boiling protection up to 258°F (125°C).
Protect against rust and corrosion:
Help keep the proper engine temperature.
Let the warning lights and gages work as thiy should.
What to Use:
Use a ,mixture of clean water (preferably distilled), and antifreeze that meets
“GM Specification 6038-M,” which won’t damage aluminum p\
arts.
Also use
GM Engine Coolant Supplement (sealer) with a complete coolant change. If
you use these, you don’t need to add anything else.
,
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1 CAUTION
4 Adding only plain water to your cooling system can be dangerous.
Plain water, or some other liquid like alcohol, can boil before th(
)per coolant mix will. Your vehicle’s coolant warning system is set
for the proper coolant mix. With plain water or the wrong mix\
, your
engine could get too hot but you wouldn’t get the overheat warning.
Your engine could catch fire and you or others could be burned. Use
a
50/50 mix of clean water and a proper antifreeze.
NOTICE
If you use an improper coolant mix, your engine could overheat an\
d 1:
badly damaged. The repair cost wouldn’t be covered by your warranty. 1
much water in the mix can freeze and xk +?e t line radiator, heater
core and other parts.
Some conditions, such as air trapped in the cooling system, can affect the
coolant level in the radiator. Check the coolant level when the engine is cold
and follow the steps under “Adding Coolant” for the prope\
r way to add
coolant.
If you have the low coolant warning system, refer to the General Motors
Service Manual or see your dealer for the proper coolant
fill procedure. (To
purchase a Service Manual, see “Service Publications’’ in the Index.) Using
the wrong
fill procedure can cause a low coolant warning indication.
If you have to add coolant more than four times a year, have your dealer
check your cooling system.
If you use the proper coolant, you don’t have to add extra inhibitors or
additives which claim to improve
the system. These can be harmful.
-
NOTICE .I
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Service & Amearance Care
Adding Coolant
r
PO206
To Check Coolant: When your engine is cold, the coolant level should be at
COLD, or a little higher. When your engine is warm, the level should be up
to HOT, or a little higher.
LOW
COOLANT
K2327
If this light comes on, it means you're low on engine coolant.
To Add Coolant: If you need more coolant, add the proper mix at the
coolant recovery tank.
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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 h\
ave 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.
You can be burned
if you spill coolant on hot engine parts. Coolant
mtains ethylene glycol, and
it will burn if the engine parts are hot
enough. Don’t spill coolant on a hot engine. ’
Radiator Pressure Cap
K2515
1
Your radiator pressure cap is a 15 psi (105 kPa) pressure-type cap
must be tightly installed to prevent coolant
loss and possible engine
damage from overheating. Be sure the arrows on the cap line up w
overflow tube on the radiator filler neck.
-
When you replace your radiator pressure cap, an ACa cap is recommended.
-
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Service & Appearance Cam
Thermostat
Engine coolant temperature is controlled by a thermostat in the engine coolant
system. The thermostat stops the flow of coolant through the r\
adiator until the
coolant reaches a preset temperature.
When you replace your thermostat, an
AC@ thermostat is recommended.
Power Steering Fluid
K2630
How To Check Power Steering Fluid:
Unscrew the cap and wipe the dipstick with a clean rag. Replace the cap
and completely tighten it. Then remove the cap again and look at the fluid
level on the dipstick.
K2693
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