1995 GMC SIERRA automatic transmission

Key in the Ignition
If you walk away from your vehicle with the keys inside, it’s an easy target
for joy riders or professional thieves
- so don’t do it.
When you park your vehicle and open the driver’s door, you‘ll hear a tone
reminding
you to remove your key from the ignition and take it with you.
Always do this.
Your steering wheel will be locked, and so will your
ignition. If you have
an automatic transmission, taking your key out also
locks your transmission. And remember to lock the doors.
Parking at Night
Park in a lighted spot, close all windows and lock your vehicle. Remember
to keep
your valuables out of sight. Put them in a storage area, or take them
with
you.
Parking Lots
If you park in a lot where someone will be watching your vehicle, it‘s best
to lock
it up and take your keys. But what if you have to leave your ignition
key? What if
you have to leave something valuable in your vehicle?
Put your valuables in a storage area, like your glove box.
Lock all the doors except the driver’s.
New Vehicle “Break-In ”
NOTICE:
Your modern vehicle doesn’t need an elaborate “break-in.” But
it will perform better in the long run if you follow these
guidelines:
Keep your speed at 55 mph (88 km/h) or less for the first 500
miles (804 km).
Don’t drive at any one speed - fast or slow - for the first
500 miles
(804 km). Don’t make full-throttle starts.
Avoid making hard stops for the first 200 miles (322 km) or
so. During this time your new brake linings aren’t yet broken
in. Hard stops with new linings can mean premature wear and
earlier replacement. Follow this “breaking-in” guideline
every time you get new brake linings.
Don’t tow a trailer during “break-in.” See “Towing a Trailer”
in the Index
for more information.
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ITICE:
If your key seems stuck in LOCK and you can’t turn it, be sure
it is all the
way in. If it is, then turn the steering wheel left and
right while you turn the key hard. But turn the key only with
your hand. Using
a tool to force it could break the key or the
ignition switch.
If none of this works, then your vehicle needs
service.
Key Release Button
The ignition key cannot be removed
from the ignition
of
manual transmission
vehicles unless the
key release button is
used.
To Remove the Key
On manual transmission vehicles, turn the key to the LOCK position while
pressing the key release button in (see the caution earlier i\
n this section about the key release lever). Keeping your finger on the butt\
on, pull the key straight out.
On automatic transmission vehicles,
turn the key to LOCK and pull it
straight cwt.
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Starting Your Gasoline Engine
If you have a diesel engine, see “Starting Your Diesel Engine” in the Index.
Engines start differently. The 8th digit of your Vehicle Identification
Number (VIN) shows the code letter or number for your engine.
You will
find the
VIN at the top left of your instrument panel. (See “Vehicle
Identification Number”
in the Index.) Follow the proper steps to start the
engine.
Automatic trunsnaission:
Move your shift lever to PARK (P) or NEUTRAL (N). Your engine won’t
start
in any other position - that’s a safety feature. To restart when you’re
already moving, use NEUTRAL
(N) only.
NOTICE:
Don’t try to shift to PARK (P) if your vehicle is moving. If you
do, you could damage the transmission. Shift to
PARK (P) only
when your vehicle
is stopped.
The gear selector should be in NEUTRAL (N). Hold the clutch pedal to the
floor and start the engine. Your vehicle won’t start
if the clutch pedal is not
all the way down
- that’s a safety feature.
To start ymr 4.3 Liter V6 (Code Z) or 5.0 Liter V8 (Code H) engine:
1. Without pushing the accelerator pedal, turn your ignition key to
START. When the engine starts, let go of the key. The idle speed will
go down as your engine gets warm.
NOTICE:
Holding your key in START for longer than 15 seconds at a time
will cause your battery to be drained much sooner. And the
excessive heat can damage your starter motor.
2. If it doesn’t start right away, hold your key in START. If it doesn’t start
in three seconds, push the accelerator pedal about one-quarter of the
way down for
12 more seconds, or until it starts.
3. If your engine still won’t start (or starts but then stops), it could be
flooded
with too much gasoline. Try this:
4. Wait 15 seconds to let the starter motor cool down. Then push your
accelerator pedal all the way to the floor. Hold
it there. Then, hold the
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Hot Engine Restart (Vehicles With 5.7L LO5 Engine and Over 8500 lbs.
GVWR):
If your engine is already hot and then stalls, turn your ignition key to OFF.
Then turn your key to RUN and wait 20 seconds before you restart your
engine. When the engine
starts, let go of the key and the accelerator pedal.
NOTICE:
Your engine is designed to work with the electronics in your
vehicle.
If you add electrical parts or accessories, you could
change the
way the fuel injection system operates. Before adding
electrical equipment, check with your dealer.
If you don’t, your
engine might not perform properly.
If you ever have to have your vehicle towed, see the part of this
manual that tells how to do it without damaging your vehicle.
See “Towing Your Vehicle” in the Index.
Driving Through Deep Standing Water
NOTICE:
If you drive too quickly through deep puddles or standing water,
water can come in through your engine’s air intake and badly
damage your engine. Never drive through water that is slightly \
lower than the underbody of your vehicle.
If you can’t avoid
deep puddles or standing water, drive through them very
slowly.
Driving In Snow (Diesel Engines)
When driving in a heavy snowstorm or in swirling snow with a diesel
engine, snow can get into the air intake system. If you keep driving
in these
conditions
the air cleaner may get plugged, causing black smoke and loss of
power. In an emergency, if the air cleaner gets plugged with snow, you can
remove the air cleaner. Then, drive to
a place of safety as soon as possible
and
put the air cleaner back on.
Starting Your Diesel Engine
Your diesel engine starts differently than a gasoline engine.
1. Automatic transmission: Move your shift lever to PARK (P) or
NEUTRAL
(N). Your engine won’t start in any other position - that’s
a safety feature. To restart when you’re already moving, use
NEUTRAL (N) only.
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NOTICE:
After you’ve used the coolant heater, be sure to store the cord as
it was before to keep
it away from moving engine parts. If you
don’t,
it could be damaged.
How long should you keep the coolant heater plugged in? The answer
depends on the weather, the kind of oil you have. and some other things.
Inste.ad of trying
to list everything here, we ask that you contact your GM
dealer in the area where you‘ll be parking your vehicle. The dealer can give
you the best advice for that particular area.
Automatic Transmission
There are several different positions for your shift lever.
If your vehicle is equipped with an automatic transmission, it now features
an electronic shift position indicator
within the instrument cluster. This
display must be powered anytime the shift lever is capable
of being moved
out of the
PARK (P) position. This means that if your key is in the OFF
position, but not locked, there will be a small current drain on your battery
which could discharge your battery over
a period of time. If you have a need
to leave your key
in the ignition in the OFF position for an extended period
for any reason,
it is recommended that you disconnect the battery cable
from the battery to prevent discharging your battery.
PARK (P) -This locks your rear wheels. It’s the best position to use
when you start your engine because your vehicle can’t move easily.
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A CAUTION:
Shifting out of PARK (f) or NEUTRAL (N) while your engine is
“racing” (running at high speed) is dangerous. Unless your foot
is firmly on the brake pedal, your vehicle could move very
rapidly.
You could lose control and hit people or objects. Don’t
shift out of
PARK (P) or NEUTRAL (N) while your engine is
racing.
NOTICE:
Damage to your transmission caused by shifting out of PARK
(P) or NEUTRAL (N) with the engine racing isn’t covered by
your warranty.
AUTOMATIC OVERDRIVE (a) - This position is for normal
driving. If you need more power for passing, and you’re:
- Going less than about 35 mph (56 km/h), push your accelerator
pedal about halfway down.
the way down.
You’ll shift down to the next gear and have more power.
- Going about 35 mph (56 kdh) or more, push the accelerator all
0 should not be used when towing a trailer, carrying a heavy load,
driving on steep hills, or for off-road driving. Select THIRD
GEAR
(3) when operating the vehicle under any of these
conditions.
THIRD GEAR (3) - This is like 63, but you never go into Overdrive.
You should use
THIRD GEAR (3) when towing a trailer. carrying a
heavy load, driving on steep hills, or
for off-road driving.
0 SECOND GEAR (2) - This position gives you more power but lower
fuel economy. You can use
SECOND GEAR (2) on hills. It can help
control
your speed as you go down steep mountain roads, but then you
would also want
to use your brakes off and on.
If you manually select SECOND GEAR (2), the transmission will drive
in second gear. You may use this feature for reducing torque to the rear
wheels when you are trying
to start your vehicle from a stop on
slippery road surfaces.
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NOTICE:
Driving with the parking brake on can cause your rear brakes to
overheat. You may have to replace them, and you could also
damage other parts of your vehicle. Always check to be sure
your parking brake is fully released before you drive.
If you are towing a trailer and are parking on any hill: See “Towing a
Trailer” in the Index. That section shows what to do first to keep the trailer
from moving.
Propshaft Brake Burnish Procedure
If you have a 3500 HD model, it is recommended that the propshaft mounted
parking brake be burnished
as part of the new vehicle break in. The parking
brake will work best after
it has been burnished following these instructions.
Make
10 (ten) stops, using the parking brake foot pedal, from 20 mph (32
km/h) about
2 1/2 miles (4 km) apart. In between stops, drive the vehicle at
20 mph (32 km/h).
Torque Lock
When parking, the weight of the vehicle may put too much force on the
parking pawl
in the transmission. It may be difficult to pull the selector
lever out of
PARK (P). This is called ”torque lock.” To find out how to
avoid torque lock, see “Torque Lock” later in this section.
Shifting lnto PARK (P) (Automatic
Transmission Models Only)
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I. Hold the brake
pedal down
with
your right foot
and set the
parking brake.
2. Move the shift lever into PARK (P) position like this:
0 Pull the lever toward you.
0 Move the lever up as far as it will go.
3. If you have four-wheel drive, be sure the transfer case is in a drive gear
- not in NEUTRAL (N)
4. Move the ignition key to LOCK.
5. Remove the key and take it with you. If you can walk away from your
vehicle
with the ignition key in your hand, your vehicle is in PARK (P).
Shifting Out of PARK (P)
Your vehicle has a brake-transmission shift interlock system. You have to
fully apply your regular brakes before you can shift from PARK (P). See
“Automatic Transmission”
in the Index.
If you cannot shift out of PARK (P), ease pressure on the shift lever and
push the shift lever all the way up into PARK (P) as you maintain brake
application. Then, move the shift lever into the gear you want.
If you ever hold the brake pedal down but still can’t shift out of PARK (P),
try this:
1. Turn the key to OFF.
2. Apply and hold the brake until the end of Step 4.
3. Shift to NEUTRAL (N).
3. Start the vehicle and then shift to the drive gear you want.
5. Have the brake-transmission shift interlock system fixed as soon as
you can.
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