tires GMC SIERRA 1993 Service Manual

23. EXHAUST PRESSURE REGULATOR VALVE INSPECTION* -Check that
the valve works properly. Correct any binding. Inspect hoses fo\
r cracks, chafing or decay. Replace parts as needed.
24.
TIRE AND WHEEL ROTATION AND INSPECTION -For proper wear
and maximum tire life, rotate tires at the first
6,000 miles (1 0 000
kilometers) for Schedule I (t) or 7,500 miles (12 500 kilometers) for
Schedule
II (.) and then every 15,000 miles (25 000 kilometers)
thereafter. Follow the instructions and patterns shown in Section 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.
For dual wheels, whenever the vehicle, wheels, or fasteners are new,
have the wheel fastener torque set at the first 100,
1,000 and 6,000
miles (160, 1600 and 10
000 km).
For 3500 H.D. Models, block the tires opposite those being removed to
keep the vehicle from rolling.
25.
DRIVE AXLE SERVICE -Check readfront axle fluid level and add as
needed. Check constant velocity joints and axle seals for leaki\
ng.
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 15,0\
00 miles
(24 135 kilometers) and refill$
every oil change. In dusty areas, or trailer towing applications, drain
fluid every 15,000 miles
(24 135 kilometers) and refi1l.t
More frequent lubrication may be required on heavy-duty or off-road
use.
Standard differential -Check fluid level and add as needed at
26.
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 sewiced.t
*An Emission Control Service
tA fluid
loss in these systems may indicate a problem. Have them
inspected and repaired at once.
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Scheduled Maintenance Sewices
When the wheels are removed for rotation, inspect disc brake pads f\
or wear
and rotors for surface condition.
Also inspect drum brake linings for wear and
cracks. Inspect other brake parts, including drums, wheel cylind\
ers, parking
brake, etc., at the same time. Remove any rust
or dirt from the wheel and
mounting surfaces before mounting the wheel.
Inspect brakes more often if driving habits or conditions resull In
frequent braking.
Owner Checks and Services
Listed below are owner checks and services which should be mad\
e 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 the 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 or on the
tire inflation charts. See “Loading Your Vehicle’’ or “Inflation-Tire Pressure” in
the Index.
At Least Once a Year
Key lock cylinder lubrication -Lubricate key lock cylinders with engine oil.
See the “Recommended Fluid and Lubricants’’ chart in this section.
Transmission neutral or clutch start switch operation
CAUTION
~
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 brake. 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. On automatic transmission vehicles, try to start the engine in each gear.
The starter should work only in
P (Park) or N (Neutral).
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C
Camper Wiring Harness .............. 2-91
Capacities/Specification Charts .. 6-95
Cassette Tape Player
Catalytic Converter
...................... 6-65
Certificationnire Label
................. 6-67
Changing
A Flat Tire ........ 5.17. 5-23
Chemical Paint Spotting
.............. 6-90
Child Restraints
Cigarette Lighter/Ashtrays
........... 2-62
Circuit Breakers (See “Fuses”)
Cleaning (See
“Audio Systems”)
(See “Safety Belts”)
Finish Care
................................ 6-88
Glass
.......................................... 6-87
Inside of Vehicle
....................... 6-85
Instrument Panel. Top
............. 6-87
Outside of Vehicle
.................... 6-88
Special Problems
...................... 6-86
Vinyl
or Leather ........................ 6-87
Wheels and Tires
..................... 6-89
Windshield
................................ 6-88
Clock
................................... 3-1 2. 3-1 5
Computer Command Control
System
..................................... 6-66
Conversion to Chassis Cab
........ 6-72
Coolant (See “Engine”)
Cooling System
............................ 5-1 1
Capacity
.................................... 6-96
Crankcase Capacity
...................... 6-96
Cruise Control
............................... 2-47
Increase Speed
......................... 2.50
On Hills ...................................... 2-51
Passing
...................................... 2-51
Resume
..................................... 2-49
Set
.............................................. 2-48
To Get Out Of
.......................... 2-52
Cup Holder
.................................... 2-65
Customer Assistance for the
Customer Satisfaction Procedure.8-2 Reduce Speed
.......................... 2-51
Hearing
or Speech Impaired .... 8-3
D
Daytime Running Lights
(Canada Only)
.................... 2.55. 2-84
Indicator Light
............... 2.55. 2-84
Diesel Fuel (See “Fuel”)
Dome Lights
................................. 2-56
Doors
............................................... 2-5
Driving Locks
............................................ 2-6
Across an Incline
..................... 4-33
After Off-Road Driving
............ 4-36
At Night
.......................... 4.36. 4-38
Backing Up
............................... 4-59
Defensive
................................... 4-10
Downhill
..................................... 4-31
Freeway
..................................... 4-43
High Beams
.............................. 4-37
Highway Hypnosis
................... 4-46
Hydroplaning
............................. 4-39
In Blizzard
................................. 4-54
In City
....................................... 4-42
In Fog. Mist and Haze
. 4.41 . 4-42
In Rain
............................ 4.38. 4-40
In Sand. Mud. Ice.
Or Snow .................................. 4-34
In Water
.................................... 4-35
Long Distance
.......................... 4-45
Loss of Control
........................ 4-24
Night Vision
.............................. 4-37
Off-Roading
............................... 4-25
On Curves
................................. 4-20
On Grades
................................. 4-60
On Hill and Mountain Roads
. 4-47
On Off-Road Hills
.................... 4-28
On Snow
or Ice .. 2.15. 4.52. 4-55
Passing
............................ 4.22. 4-59
Skidding
..................................... 4-24
Stuck in Deep Snow
..... 4.54. 5-33
Through Water
.............. 2.15. 4-35
Uphill
.......................................... 4-29
Winter
........................................ 4-52
With a Trailer
............................ 4-55
Drunken Driving
........................... 4-11
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S
Safety Belts .................................. 1-1 1
Center Passenger Position
...... 1-26
Cleaning
..................................... 6-87
Checking Restraint System
..... 1-52
Child Restraints
........................ 1-37
Children
..................................... 1-35
Driver Position
.......................... 1-1 8
Extender
.................................... 1-52
Lap Shoulder
............................. 1-19
Larger Children
.......... : .............. 1-50
Proper Wear
.............................. 1-1 8
Questions and Answers
.......... 1-1 6
Rear Seat Passengers
............. 1-29
Reminder Light
......................... 1-1 7
Replacing After a Crash
.......... 1-53
Right Front Passenger Position
.................................. 1-25
Small Children and Babies
..... 1-36
Use During Pregnancy
............. 1-24
Why They Work
........................ 1-13
Safety Chains
............................... 4-58
Safety Warnings and Symbols
..... 0-2
Scheduled Maintenance Services
................ 7-3, 7-4, 7-18
Seats
Controls
........................................ 1-2
Easy Entry Seat
.......................... 1-8
Latches
.............................. 1-5, 1-10
Manual Front
............................... 1-2
Power Driver’s
............................ 1-3
Rear
.............................................. 1-9
Reclining
..................................... 1-3
Do-It-Yourself
............................... 6-3
Parts Identification Label
......... 6-94
Publications
........................ 8-6, 8-8
Replacement
. Parts and
Filter Recommendations
...... 6-99
Light
................................ 2-83, 6-66
Adults
........................................ 1-1
8
Service
Service Engine Soon Service Station Checks
............... 7-28
Shift Indicator Light
.......... 2.27. 2-85
Shifting Into Park
........................ 2-30
Single Belt Accessory Drive
...... 6-51
Sliding Rear Window
.................. 2-40
Spare Tire
..................................... 5-20
Pickup Bed Mourrting
.... 5.23. 5-32
Removal
..................................... 5-21
Storage
...................................... 5-31
Specification Charts
.................... 6-95
Speedometer
................................ 2-76
Starting Your Diesel Engine
....... 2-15
Starting Your Gasoline Engine
... 2-12
Steering
......................................... 4-19
Column Shift Lever
.................. 2-31
In Emergencies
........................ 4-21
Storage Compartments
............... 2-63
Console
........................... 2.64. 2-65
Glove Box
................................. 2-63
Other
.......................................... 2-68
Sun Visors
.................................... 2-61
Swing-Out Windows
.................... 2-40
T
Tachometer ........................ 2-76, 2-78
Tailgate
............................................ 2-8
Theft
................................................ 2-9
Thermostat
.................................... 6-46
Tilt Wheel
..................................... 2-41
Tires
............................................... 6-72
Balancing
................................... 6-82
Chains
........................................ 6-84
Changing a Flat
............. 5-17, 5-23
Flat
............................................. 5-17
Hub CapsNVheel Nut Caps
.... 5-24
Inspection/Rotation
........ 6-78. 6-79
Loading
...................................... 6-67
New
................................. 6-80. 6-81
Pressure
..................................... 6-73
Spare (See “Spare Tire”) Underbody Carrier
................... 5-21
Uniform Tire Quality Grading
. 6-81
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