1998 CHEVROLET EXPRESS brake

Downloaded from www.Manualslib.com manuals search engine Brake Adjustment
Every time you make a brake stop, your disc brakes
adjust for wear.
Battery
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.
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.
Your vehicle
was designed and tested with top-quality
GM brake parts. 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 approved 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.
Every new vehicle has an ACDelco Freedom@ battery.
You never have to add water to one of these. When it’s
time for a new battery, we recommend an ACDelco
Freedom battery. Get one that has the replacement
number shown on the original battery’s label.
If you have a diesel engine, you have two batteries. The
primary battery is located on the passenger’s side
of the
engine compartment. The second battery is located
on
the driver’s side framerail.
Vehicle Storage
If you’re not going to drive your vehicle for 25 days
or more, remove the black, negative
(-) cable from
the battery. This will help keep your battery from
running down.
6-31

Downloaded from www.Manualslib.com manuals search engine Wheel Replacement
Replace any wheel that is bent, cracked, or badly
rusted or corroded. If wheel nuts keep coming loose,
the wheel, wheel bolts and wheel nuts should be
replaced. If the wheel leaks air, replace it (except
some
aluminum wheels, which can sometimes be repaired).
See your dealer if any
of these conditions exist.
Your dealer will know the kind of wheel
you need.
Each new wheel should have the same load-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If
you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new
GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts and wheel nuts for your vehicle.
I A CAUTION:
Using the wrong replacement wheels, wheel
bolts or wheel nuts on your vehicle can be
dangerous. It could affect the braking and
handling
of your vehicle, make your tires lose
air and make you lose control. You could have
a collision in which you or others could be
injured. Always use the correct wheel, wheel
bolts and wheel nuts for replacement.
I NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire or tire
chain clearance to the body and chassis.

Downloaded from www.Manualslib.com manuals search engine POSITION
15.
16.
17.
18.
19.
20.
21.
22.
23.
24. A.
NAME
DRL
TURN B/U RADIO-
1
BRAKE
RADIO-B
TRANS SECURITYISTRG
RR
DEFOG
Not Used
FW HVAC
PWR ACCY
CIRCUITS PROTECTED
DRL Relay
Front Turn, RR Turn, Back-up Lamps,
BTSI Solenoid
Radio (Ign, Accy), Upfitter Provision Relav
4WAL PCM, ABS, Cruise Control
Radio (Battery), Power Antenna
PRNDL, Automatic Transmission
EVO Steering, Passlock
Rear Window Defog
RR HVAC Controls, HIGH, MED, LOW Relays Power Door Lock, Six-Way Power Seat, Keyless Entry
Illumination Module
B. PWR WDO Power Windows
Fuse amperage levels are imprinted
on the fuse panel under the dash.
6-64

Downloaded from www.Manualslib.com manuals search engine Engine Compartment Fuse Relay Center
The fuse block is on the driver’s side of the engine
compartment at the rear.
U
NAME
IGN-B
IGN-A
BATT
LIGHTING
RR BLOWER
ENG-I
NAME
BLOWER ABS
CIRCUITS PROTECTED
Front Blower Motor
Electronic Brake Control Module AIC
SPARE
AUX A
AUX B
RH-HDLP
CIRCUITS PROTECTED
Ignition
Switch
Starter Relay, Ignition Switch
Instrument Panel
Fuse Block
Instrument Panel Fuse Block,
Headlamp Switch
Rear Auxiliary Blower Motor Relays
Heated
02 Sensors, Mass Air Flow
Sensor, EGR Valve Solenoid, Evap
Canister Purge Valve, Crankshaft
Position Sensor, Secondary Air Injection Relay (Diesel), Water in
Fuel Sensor (Diesel), Fuel Heater
(Diesel), Glowplug Relay (Diesel),
Wastegate Solenoid (Diesel)
Air Conditioning Clutch Relay
Spare Fuses
Upfitter Provisions Upfitter Provisions
Right-hand Headlamp (Export only)

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Short Trip/City Definition -- Gasoline Engines
Follow the Short Trip/City Maintenance Schedule if any
one of these conditions is true for your vehicle:
Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
Most trips include extensive idling (such as frequent
driving
in stop-and-go traffic).
Most trips are through dusty areas.
You frequently tow a trailer or use a carrier on top of
If the vehicle is used for delivery service, police, taxi
One of the reasons you should follow this schedule if
you operate your vehicle under any of these conditions
is that these conditions cause engine oil
to break
down sooner:
your vehicle.
or other commercial application.
Short Trip/City Intervals -- Gasoline Engines
Every
3,000 Miles (5 000 km): Engine Oil and Filter
Change (or
3 months, whichever occurs first). Chassis
Lubrication (or
3 months, whichever occurs first). Drive
Axle Service (or
3 months, whichever occurs first).
Every 6,000 Miles (10 000 km): Tire Rotation.
Every 15,000 Miles (25 000 km): Air Cleaner Filter
Inspection, if driving in dusty conditions. Shields and
Underhood Insulation Inspection (GVWR above
8,500 lbs. only). Front Wheel Bearing Repack (or at
each brake relining, whichever occurs first).
Every 30,000 Miles (50 000 km): Air Cleaner Filter
Replacement. Fuel Filter Replacement.
Every 50,000 Miles (83 000 km): Automatic
Transmission Service (vehicles over
8600 GVWR or
driven under severe conditions only).
7-5

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Long Tripmighway Intervals -- Gasoline Engines I
Every 7,500 Miles (12 500 km): Engine Oil and Filter
Change (or every
12 months, whichever occurs first).
Chassis Lubrication (or every 12 months, whichever
occurs first). Drive Axle Service. Tire Rotation.
Every 15,000 Miles (25 000 km): Shields and
Underhood Insulation Inspection (GVWR above
8,500 lbs. only).
Replacement. Air Cleaner Filter Replacement. Front
Wheel Bearing Repack (or at each brake relining,
whichever occurs first).
Transmission Service (vehicles over
8600 GVWR or
driven under severe conditions only).
Every 30,000 Miles (50 000 km): Fuel Filter
Every 50,000 Miles (83 000 km): Automatic
Long Tripmighway Intervals -- Gasoline Engines
Every
60,000 Miles (100 000 km): Engine Accessory
Drive Belt Inspection. Fuel Tank, Cap and Lines
Inspection. Exhaust Gas Recirculation System
Inspection. Evaporative Control System Inspection.
Every 100,000 Miles (166 000 km): Spark Plug Wire
Inspection. Spark Plug Replacement. Automatic
Transmission Service (normal conditions). Positive
Crankcase Ventilation (PCV) Valve Inspection.
Every 150,000 Miles (240 000 km): Cooling System
Service (or every
60 months, whichever occurs first).
These intervals only summarize maintenance services.
Be sure
to follow the complete maintenance schedule on
the following pages.
7-7

Downloaded from www.Manualslib.com manuals search engine Short Trip/City Maintenance Schedule -- Gasoline Engines
The services shown in this schedule up to 100,000 miles
(166 000 km) should be performed after 100,000 miles
(166 000 km) at the same intervals. The services shown
at 150,000 miles (240
000 km) should be performed at
the same interval after 150,000 miles (240
000 km).
See “Owner Checks and Services” and “Periodic
Maintenance Inspections” following.
Footnotes
The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to the
completion of the vehicle’s useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the maintenance
be recorded.
# Lubricate the front suspension, kingpin bushings,
steering linkage and rear driveline center splines.
+ A good time to check your brakes is during tire
rotation. See “Brake System Inspection” under “Periodic
Maintenance Inspections” in
Part C of this schedule.
* * Drive axle service (see “Recommended Fluids and
Lubricants” in the Index for proper lubricant to use):
0
0
0
Locking Differential -- Drain fluid and refill at first
engine oil change. At subsequent oil changes, check
fluid level and add fluid as needed. If driving in
dusty areas or towing a trailer, drain fluid and refill
every 15,000 miles (25
000 km).
Standard Differential -- Check fluid level and add
fluid as needed at every oil change. If driving in
dusty areas
or towing a trailer, drain fluid and refill
every 15,000 miles
(25 000 km).
More frequent lubrication may be required for
heavy-duty use.
7-8

Downloaded from www.Manualslib.com manuals search engine I Short TripKity Maintenance Schedule -- Gasoline Engines I
0 Clean and repack the front wheel bearings (or at each brake relining,
whichever occurs first).
0 Vehicles With GVWR Above 8,500 lbs. Only: Inspect shields and underhood
insulation for damage or looseness. Adjust or replace as required.
This is a
Noise Emission Control Service. Applicable only
to vehicles sold in the
United States.
18,000 Miles (30 000 km)
0 Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
0 Lubricate chassis components (or every 3 months, whichever occurs first).
0 Check axle fluid level and add fluid as needed. (See footnote **.)
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
rotation pattern and additional information. (See footnote
+.)
(See footnote #.)
21,000 Miles (35 000 km)
Change engine oil and filter (or every 3 months, whichever occurs first).
0 Lubricate chassis components (or every 3 months, whichever occurs first).
0 Check axle fluid level and add fluid as needed. (See footnote **.)
An Emission Control Service.
(See footnote #.)
DATE I
MILEAGE ACTUAL I SERVICEDBY I
DATE I
SERVICED BY:
1
7-11