brake CHEVROLET SUBURBAN 1996 Workshop Manual

3. Close the air bleed valve.
4. Turn the ignition key to START for 10 to 15 seconds at a time until
your engine starts.
Fuel Filter Replacement (Diesel Engines)
If you want to change the fuel filter yourself, here's how to do it:
First, drain any water from the filter following the procedure for draining
water listed previously.
Your vehicle's engine should be off until the end of the following procedure.
r.
1. Apply the parking brake.
2. Take off the fuel tank cap. This releases vacuum in the tank.
3. Unscrew and
remove the ring
nut from the top
of the filter head.
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Wait at least 30 minutes before checking the transmission fluid level if you
have been driving:
0 When outside temperatures are above 90°F (32°C j,
At high speed for quite a while.
In heavy traffic - especially in hot weather.
0 While pulling a trailer.
To get the right reading, the fluid should be at normal operating
temperature, which
is 180°F to 200°F (82°C to 93°C).
To check 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 (10"C), drive
the vehicle in DRIVE (D) 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 (IO'C), you
may have to idle
the engine longer. Should the fluid level be low during a
cold check,
you must perform a hot check before adding fluid. This will
give you
a more accurate reading of the fluid level.
lo check the fluid hot or cold
0 Park your vehicle on a level place. Keep the engine running.
With the parking brake applied, place the shift lever in PARK (P).
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 PARK (P).
Let the engine run at idle for three minutes or more.
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Power Steering Fluid
How To Check Power Steering Fluid
When the engine compartment is cool, 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.
The level should be at the FULL COLD mark. Add enough fluid to bring
the level up
to the mark.
A fluid
loss in this system could indicate a problem. Have the system
inspected and repaired.
What to Add
Refer to the Maintenance Schedule to determine what kind of fluid to use.
See “Recommended Fluids and Lubricants”
in the Index.
I
I NOTICE:
When adding power steering fluid or making a complete fluid
change, always use the proper fluid. Failure to use the proper\

fluid can cause leaks and damage hoses and seals.
Hydro-Boost Brake System (Hydraulic Pump)
The power steering pump is also used as the Hydro-boost pump. Refer to
“Power Steering System” in this section when checking fluid level or
adding fluid.
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Brakes
Brake Master Cylinder
Your brake master cylinder is here. It is filled with DOT-3 brake fluid.
I L m
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.
I
Refer to the Maintenance Schedule to determine when to check your brake
fluid. See “Periodic Maintenance Inspections’’
in the Index.
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To Check Brake Fluid
You can check the brake fluid without taking off the cap. Just look at the
windows
on the brake fluid reservoir. The fluid levels should be above MIN.
If
they aren’t, have your brake system checked to see if there is a leak.
After work
is done on the brake hydraulic system, make sure the levels are
above
MIN and below the top of each window.
What to Add
When you do need brake fluid, use only DOT-3 brake fluid - such as
Delco Supreme 1 1 @ (GM Part No. 1052535). Use new brake fluid from a
sealed container only, and always clean the brake fluid reservoir cap before
removing it.
NOTICE:
Don’t let someone put in the wrong kind of fluid. For
example, just a few drops of mineral-based oil, such
as engine
oil, in your brake system can damage brake system parts so
badly that they’ll have to be replaced.
Brake fluid can damage paint, so be careful not to spill brake
fluid on your vehicle. If you do, wash it off immediately. See
“Appearance Care” in the Index.
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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).
I 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.
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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.
Front Shock Absorbers
The front shock absorbers of your vehicle do many things. They help the
vehicle ride smoothly and also control the travel of the suspension system.
When the shock absorbers are serviced, any replacement shock absorbers
must be the same
as the original equipment shock absorbers in both
extended length and strength.
I NOTICE:
If you use shock absorbers that are not the same as the original
shock absorbers, the shock absorbers or suspension system
could be damaged.
Windshield Wiper Blade Inserts
To replace your
windshield wiper
blade inserts, lift the
wiper arm and rotate
the blade until
it is
facing away from
the
windshield.
Unlatch the end of the insert from the holding clips. Remove the insert
and
slide a new one in place. Make sure the blade is secured in the clips.
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I NOTICE:
The wrong wheel can also cause problems with bearing life,
brake cooling, speedometer/odometer calibration, headlamp
aim, bumper height, vehicle ground clearance, and tire
or tire
chain clearance
to the body and chassis.
Used Replacement Wheels
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Fuses and Circuit Breakers
POSITION
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13. 14.
15.
16.
17.
18.
19.
20.
21.
22.
NAME
STOP/HAZ
T CASE
CTSY
GAGES
RR WAC
CRUISE
AUX PWR CRANK
PARK LPS
AIR BAG
WIPER
HTR-A/C
CIG LTR
ILLUM
DRL-FOG
TURN-B/U
RADIO
BRAKE
RADIO
BATT
TRANS
CIRCUITS PROTECTED
Stop/TCC Switch, Buzzer, CHMSL, Hazard
Lamps, Stop Lamps
Transfer Case
Courtesy Lamps, Cargo Lamp, Glove Box
Light, Dome/RDG Lamps, Vanity Mirrors,
Pwr Mirrors
IP Cluster, DRL Relay, HDLP Switch,
Keyless Entry, Low Coolant Module
RR HVAC Controls
Cruise Control
Aux Power Outlet
Diesel Fuel Pump, DERM, ECM
Lic Lamp, Park Lamp, Tail Lamp, Roof
Marker Lamp, Tdi1 Gate Lamps, Front Side
Markers, Door Switch Illum, Fender Lamps
DERM
Wiper
Motor, Washer Pump
A/C, A/C Blower, High Blower Relay
Power Amp, Rear Liftglass, Cig Lighter,
Door Lock Relay, Pwr Lumbar Seat
4WD, Indicator, LP Cluster, HVAC
Controls,
RR HVAC Controls, IP Switches,
Radio Illumination
DRL Relay,
Fog Lamp Relay
Frt Turn, RR Turn, B/U Lps
Radio (Ign)
DRAC, 4WAL PCM. ABS,
... . Cruise
Radio (Batt)
PRNDL, Auto Transmission, Speedo,
Check Gages Tell Tde
Not Used Not Used
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LAMP OR BULB
INTERIOR
Dome Lamps
Reading
Lamps
Roof Console Lamps'$
Door Courtesy Lamp
LAMP OR BULB
INTERIOR
Four Wheel Drive
Indicator
Four Wheel Drive Shift
Lever
Instrument Panel
Compartment
Lamp
Ashtray Lamp
Sunshade Vmity
Mirror
'$Suburban Only
LAMP OR BULB
INSTRUMENT
PANEL
Daytime Running Lamps Indicator?
Charging System Indicator Lamp
Instrument Cluster
Illurnination -Gage
Cluster
Instrument Cluster
Illumination
-Tachometer Cluster
Headlamp Beam
Indicator
Directional Signal
Indicator
Brake Warning Indicator
TRADE NO.
21 1-2
21 1-2
168
I94
TRADE NO.
194
I94 194
194
74
TRADE NO.
74
74
194
194
74
74 74
2
4
2
2/4*
QTY
1
I
1
1
4
I
1
4
6
I
2
1
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