1994 CHEVROLET ASTRO PASSENGER brakes

Downloaded from www.Manualslib.com manuals search engine Parking on Hills
You really should not park your vehicle, with a trailer attached, on a hill. If
something goes wrong, your rig could start to move. People can be injured.
and both your vehicle and the trailer can be damaged.
But if you ever have to park your rig on a hill, here’s how to do it:
1. Apply your regular brakes, but don’t shift into “P” (Park) yet.
2. Have someone place chocks under the trailer wheels.
3. When the wheel chocks are in place, release the regular brakes until the
chocks absorb the load.
4. Reapply the regular brakes. Then apply your parking brake, and shift to
5. Release the regular brakes.
“P” (Park).
When You Are Ready to Leave After Parking on a Hill
1. Apply your regular brakes and hold the pedal down while you:
Start your engine;
Shift into a gear; and
Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you’re pulling a trailer. See
the Maintenance Schedule for more on this. Thin.gs that are especially
important in trailer operation are automatic transmission fluid (don’t
overfill), engine oil, axle lubricant, belt, cooling system, and brake
adjustment. Each of these
is covered in this manual, and the Index will help
you find them quickly. If you’re trailering, it’s a good idea to review these
sections before you start your trip.
Check periodically
to see that all hitch nuts and bolts are tight.
Trailer Light Wiring
See “Trailer Wiring Harness” in the Index.
4-29

Downloaded from www.Manualslib.com manuals search engine Brakes
Brake Master Cylinder
Your brake master cylinder is here. It is filled with DOT-3 brake fluid.
There
are only two reasons why the brake fluid level in your master cylinder
might go down. The first is
that the brake fluid goes down to an acceptable
level during normal brake lining wear. When new linings
are put in, the
fluid level goes back up. The other reason is that fluid
is leaking out of the
brake system.
If it is, you should have your brake system fixed, since a leak
means that sooner or later your brakes won’t work well, or won’t work at
all.
So, it isn’t a good idea to “top off’ your brake fluid. Adding brake fluid
won’t correct a leak. If
you add fluid when your linings are worn, then
you’ll have
too much fluid when you get new brake linings. You should add
(or remove) brake fluid, as necessary, only when work is done
on the brake
hydraulic system.
Refer
to the Maintenance Schedule to determine when to check your brake
fluid. See “Periodic Maintenance Inspections” in the Index.
6-32

Downloaded from www.Manualslib.com manuals search engine Brake Wear
Your vehicle has front disc brakes and rear drum brakes.
Disc brake pads have built-in wear indicators that make a high-pitched
warning sound when the brake pads are worn and new pads are needed. The
sound may come and go or be heard all the time your vehicle is moving
(except when you are pushing on the brake pedal firmly).
NOTICE:
Continuing to drive with worn-out brake pads could result in
costly brake repair.
Some driving conditions or climates may cause a brake squeal when the
brakes are first applied or lightly applied. This does not mean something is
wrong with your brakes.
Your rear drum brakes don't have wear indicators, but
if you ever hear a
rear brake rubbing noise, have the rear brake linings inspected. Also,
the
rear brake drums should be removed and inspected each time the tires are
removed for rotation or changing. When you have the front brakes replaced,
have the rear brakes inspected, too.
Brake linings should always be replaced as complete axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not return to normal height, or if
there is a rapid increase in pedal travel. This could be a sign of brake
trouble.
Brake Adjustment
Every time you make a brake stop, your disc brakes adjust for wear.
If your brake pedal goes down farther than normal, your rear drum brakes
may need adjustment. Adjust them by backing
up and firmly applying the
brakes a few times.
6-34

Downloaded from www.Manualslib.com manuals search engine Replacing Brake System Parts
The braking system on a modern vehicle is complex. Its many parts have to
be of top quality and work well together
if the vehicle is to have really good
braking. Vehicles we design and test have top-quality
GM brake parts in
them, as your vehicle does when it is new. When you replace parts of your
braking system
- for example, when your brake linings wear down and
you have to have new ones put in
- be sure you get new genuine GM
replacement parts. If you don’t, your brakes may no longer work properly.
For example,
if someone puts in brake linings that are wrong for your
vehicle, the balance between your front and rear brakes can change, for
the
worse. The braking performance you’ve come to expect can change in many
other ways if someone puts in the wrong replacement brake parts.
Hydro-Boost Brake System
The power steering pump also powers the Hydro-Boost. Refer to “Power
Steering Fluid”
in the section when checking the fluid level or adding fluid.
Battery
Every new vehicle has a Delco Freedom@ battery. You never have to add
water to one
of these. When it’s time for a new battery, we recommend a
Delco Freedom@ battery. Get one that has the catalog number shown on the
original battery’s label.
Vehicle Storage
If you’re not going to drive your vehicle for 25 days or more, take off the
black, negative
(-) cable from the battery. This will help keep your battery
from running down.
Contact your dealer to learn how to prepare your vehicle for longer storage
periods.
6-35

Downloaded from www.Manualslib.com manuals search engine 13. TIRE AND WHEEL ROTATION AND INSPECTION - For
proper wear and maximum tire life, rotate tires at the first
6,000 miles
(10
000 kilometers) for Schedule I or 7,500 miles (12 500 kilometers)
for Schedule I1 and
then every 15,000 miles (25 000 kilometers)
thereafter. Follow the instructions and patterns shown in Sectio\
n
6.
Check tires for uneven wear or damage. If irregular or premature wear
is apparent, check wheel alignment. Also, check for damaged wheels.
See “Tires” in the Index for more information.
14.
DRIVE AXLE SERVICE - Check readfront axle fluid level and add
as needed. Check constant velocity joints and axle seals for leaking.
Locking Differential - Drain fluid at first oil change and refill.
Check fluid level and add as needed at subsequent oil changes. In
dusty areas or trailer towing applications, drain fluid at every
15,000 miles (24 135 kilometers) and refill.?
Standard Differential - Check fluid level and add as needed at
every oil change. In dusty areas or trailer towing applications\
,
drain fluid every
15,000 miles (24 135 kilometers) and refill.?
15. BRAKE SYSTEM INSPECTION - When the engine oil is changed,
inspect the lines and hoses for proper hookup, binding, leaks, cracks,
chafing, etc. Check the parking brake adjustment, and the fluid\
level in the master cylinder. A low fluid level can indicate
worn disc brake pads
which may need to be serviced.?
When the wheels are removed for rotation, inspect disc brake pads for
wear and rotors for surface condition. Also inspect drum brake linings
for wear and cracks. Inspect other brake parts, including drums, wh\
eel
cylinders, parking brake, etc. at the same time.
Inspect brakes more often if driving habits or conditions resul\
t in
frequent braking.
-f A fluid loss in these systems may indicate a problem. Have them inspected a\
nd
repaired at once.
7-9

Downloaded from www.Manualslib.com manuals search engine Owner Checks and Services
Listed below are owner checks and services which would be made at the
time period specified
to help ensure proper safety, emission performance,
and dependability
of your vehicle.
Be sure
any necessary repairs are completed at once. Whenever any fluids
or lubricants are added to your vehicle, make sure they are t\
he proper ones,
as shown in this section.
At Least Once a Month
Tire Inflation Pressure Check - Check the tires for proper inflation. If
they
are low, inflate them to the level specified on the Certification label.
See “Inflation-Tire Pressure” in
the Index.
At Least Once a Year
Key Lock Cylinder Lubrication - Lubricate key lock cylinders with one
of the lubricants recommended in this section.
Transmission Neutral or Clutch Start Switch Operation -
1. Before you start, be sure you have enough room around the veh\
icle.
2. Firmly apply both the manual parking brake, and the regular br\
ake. See
“Brakes” and “Parking Brake”
in the Index. Do not use the accelerator
pedal.
3. Be ready to turn off the engine immediately if it starts.
4. Try to start the engine in each gear. The starter should work only in “P”
(Park) or “N’ (Neutral).
7- 10

Downloaded from www.Manualslib.com manuals search engine Index
A
AirBag ........................................................ 1-25
Servicing Your Air Bag-Equipped Vehicle ......................... 1-29
Aircleaner ..................................................... 6-19
Airconditioning ................................................. 3-5
FanLever .................................................... 3-5
FunctionLever ................................................ 3-5
Maintenance ................................................. 6-42
Rear ......................................................... 3-6
Refrigerant Capacity ........................................... 6-75
Temperature Lever ............................................. 3-5
All-Wheel Drive ........................................... 2-26, 6-24
Alternative Dispute Resolution Program ............................... 8-3
Antenna, Fixed Mast ........................................... 3-25
Anti-lock Brakes (See “Brakes”)
Appearancecare
................................................ 6-54
MaterialsChart ............................................... 6-62
Ashtrays ....................................................... 2-48
Assist Handles .................................................. 2-49
Audiosystems ................................................... 3-8
AM Radio .................................................... 3-9
AM-FM Stereo Audio Cassette System with Equalizer ................ 3-16
AM-FM Stereo Audio Cassette System ............................ 3-13
AM-FM Stereo Audio Compact Disc (CD) System ................... 3-20
AM-FM Stereo Audio System ................................... 3-11
Anti-Theft Feature ............................................ 3-23
Cassette Tape Player ........................................... 3-15
CompactDiscCare ............................................ 3-25
Automatic Transmission .......................................... 2-17
Fluid ....................................................... 6-20
Axle Front
....................................................... 6-25
Rear ........................................................ 6-24
..... . . 6-35 Battery ...............
Belts (See “Safety Belts”)
Better Business Bureau
Brakes Mediation
.................................................... 8-3
Adjustment .................................................. 6-34
Anti-lock .................................................... 4-6
Fluid ....................................................... 6-33
Hydro-Boost System (Hydraulic Pump) ........................... 6-35
Master Cylinder .............................................. 6-32
Parking ..................................................... 2-20
PedalTravel ................................................. 6-34
RearDrum ................................................... 6-34
Replacingparts ............................................... 6-35
SystemWarningLight ......................................... 2-55
1

Downloaded from www.Manualslib.com manuals search engine Publications ................................................... 8-7
Replacement Part/Filter Recommendations
......................... 6-74
StationsChecks
............................................... 7-16
Servicing Your Facial Air Bag-Equipped Vehicle
....................... 1-29
Shifting Into P (Park)
............................................. 2-21
Shifting Out Of P (Park)
.......................................... 2-22
Single Belt Accessory Drive
....................................... 641
SpareTire ...................................................... 5-32
Specification Charts
.............................................. 6-68
Springs. Fiberglass
............................................... 6-61
Starting Your Engine
................................ ... 2-14
Steering
In Emergencies
................................................ 4-7
Tips
......................................................... 4-8
Storage Compartments
............................................ 2-50
Storing the JacMSpare Tire
........................................ 5-31
Sunvisors
..................................................... 2-47
Speedometer
.................................................... 2-53
T
Theft .......................................................... 2-11
Thermostat
..................................................... 6-29
TiltWheel
...................................................... 2-29
Tires
.......................................................... 647
Chains
...................................................... 6-54
Changing A Flat
......................................... 5-18. 5-24
Compact Spare
............................................... 5-32
Inspection and Rotation
........................................ 649
Loading
..................................................... 6-44
New
........................................................ 6-50
Pressure
..................................................... 6-48
TopStrap
...................................................... 1-38
Towing Your Vehicle
.............................................. 5-7
TowingATrailer
................................................ 4-23
Backingup
.................................................. 4-28
Uniform Tire Quality Grading
................................... 6-51
Following Distance
............................................ 4-28
Making Turns
................................................ 4-28
Turnsignals
................................................. 4-28
Brakes
...................................................... 4-26
WiringHarness
.......................................... 2-66. 6-66
Transfercase
................................................... 6-24
AddFluid
................................................... 6-23
CheckFluid
.................................... .......... 6-20
TorqueLock
................................................. 2-23
Trailer
Trailering Package
............................................... 646
Transmission. Automatic
.......................................... 2-17
Trip Odometer
.................................................. 2-54
Turn SignaYMultifunction Lever
.................................... 2-30
Lane Change Indicator
.................................... 2-30. 2-61
8
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