four wheel drive GMC SIERRA 1993 Owner's Manual

If your vehicle has the four-wheel-drive option and the transfer c\
ase is
engaged, a dolly must be used under the rear wheels when towi\
ng from the
front.
Engine Overheating
You will find a coolant temperature gage on your vehicle instrument\
panel. If
you have a diesel engine, you will also find a low coolant light on your
instrument panel.
If Steam Is Coming From Your Engine:
K2509
I CAUTION
A
Steam from an overheated engine can burn you badly, even if you
just open the hood. Stay away from the engine
if you see or hear
steam coming from it. Just turn
it off and get everyone away from
the vehicle until
it cools down. Wait until there is no sign of steam
or coolant before opening the hood.
If you keep driving when your engine is overheated, the liquids in it
can catch fire. You or others could be badly burned. Stop your
engine
if it overheats, and get out of the vehicle until the engine is
cool.
5-9
ProCarManuals.com

Hydraulic Clutch Grease Fitting
A grease fitting is on the clutch housing for lubricating the clutch fork ball
stud. See your Maintenance Schedule for when to lubricate the clutch
housing. See “Recommended Fluids and Lubricants” in the Index for the
proper lubricant to use.
Be sure not to over-fill because you could damage your clutch.
Four- Wheel Drive
Most lubricant checks in this section also apply to four-wheel-drive vehicles.
However, they have two additional systems that need lubrication.
Transfer Case
When to Check Lubricant:
Refer to the Maintenance Schedule to determine how often to check the
lubricant. See “Periodic Maintenance Inspections” in the Index.
How to Check and Add Lubricant:
I
PO230
If the level is below the bottom of the filler plug hole, you’ll need to add
some lubricant. Add enough lubricant to raise the level to the bottom of the
filler plug hole.
What to Use:
Refer to the Maintenance Schedule to determine what kind of lubricant to
use. See “Recommended Fluids and Lubricants” in the Index.
639
ProCarManuals.com

I I Power Rating I 1
Lamp or Bulb
Malfunction Indicator (“Service Engine
Quantity
at 12.8V, Watts Trade No.
Soon”)
“Diesel only
**Crew Cab Only tCanadian Vehicles only t0390
1 .7
74
Service Fuel Filter Lamp*
1 .7
74
Low Coolant Lamp*
1 .7 74 Glow Plugs Lamp*
1 .7
74
Upshift Indicator
1 .7
74
Service Replacement Part and Filter Recommendations
Engine
(VIN)
4.3 (Z)
5.0 (H)
5.7 (K)
6.2 (C)
6.2
(J)*
6.5 (F)*
7.4
(N)
-
Oil
Filter
PF51
PF35t
PF35t
PF35
PF35
PF35
PF35
-
Air
Cleaner
A1 78CW A348C
A348C
A644C A644C
A917C
A348C
PCV
Valve
CV789C
cv774c
cv774c
-
-
-
cv774c I I
tFour Wheel Drive Vehicles use a PF51
*Heavy
Duty Emission Engine
1,
Spark** Plugs
CR43TS
.CR43TS
.CR43TS
-
-
.CR43TS
oil filter
’*Use AC copper-cored resistor type spark plugs.
Fuel
Filter
GF481
GF481
GF481
TP 1
006
TP 1 006
TP1006
GF481
-I
RC36
RC36
RC32
RC32
RC32
RC36
t0039
6-99
ProCarManuals.com

Service & Appearance Care
Fuses and Circuit Breakers
Name
Gages
Turn-B/U EMCllgn
Inj. A
Brake
AC/Htr
Ctsy
Park LP P. Lps
StoplHaz. Wiper
Radio
Accll g n
.
Acc/Batt. Crank 4WD
DRL
Circuits Protected
Cruise Control, 4 WD Display Illum. Rear
Window Defogger Timer, Aux. Batt. Relay
Feed, Safety Belt Buzzer Timer, Cluster
Ign. Feed
Back-up Lamps, Turn Signals
T.C.C., Air Diverter, E.S.C., E.G.R., E.C.M.
Ign., R.W.A.L. Brake Switch
Throttle Body Injectors R.W.A.L., Cluster-Speed0
H.V.A.C.
4 WD, Aux. Batt. Relay
Dome Lamp, Cargo Lamp, Ctsy. and Glove
Box Lps. (TR-9), Radio (Memory-Clock)
Horn Relay, Horn Feed, Cigar Lighter, Park
Lamps
C49 SW Illum., Headlamp “On” Warning,
Radio Illum., H.V.A.C. Illum.
Haz. Flasher, Seat Belt Buzzer, Stop
Lmps., R.W.A.L. Memory
Windshield Wiper, Washer
Radio Feed
Pwr. Windows
Door Locks, Rear Window Defogger
Crank, Discreet Four Wheel Drive
Daytime Running Lights
Fuse
20 Amp
15 Amp
10 Amp
10 Amp
15 Amp
25 Amp
20 Amp
20 Amp
5 Amp
15 Amp
25 Amp
10 Amp
5 Amp
25 Amp
15 AmD
Circuit
Breaker
30 Amp
30 Amp
An inline fuse
is used for the underhood lamp
10 not use fuses of higher amperage than those recommended above.
TO038
6-1 00
ProCarManuals.com

Scheduled Maintenance Services
Scheduled Maintenance Services
This part tells you the maintenance services that you should h\
ave done and
the times you should schedule them. Your GM dealer knows your vehicle best
and wants you
to be happy with it. If you go to your dealer for your service
needs, you’ll know that GM-trained and supported service peop\
le will perform
the work using genuine GM parts.
These schedules are for vehicles that:
carry passengers and cargo within the recommended limits. You will find
these limits on your vehicle’s Certification Label. See “L\
oading Your
Vehicle” in the Index.
are driven on regular road surfaces, and within legal driving \
limits.
are driven off-road in the recommended manner. See the Index U\
nder
use the recommended fuel. See “Fuel” in the Index.
“Off Road Driving With Your Four Wheel Drive Vehicle.”
selecting The Proper Maintenance Services
To find the proper maintenance schedule for your vehicle, you must\
know two
things. What engine your vehicle has, and how you use your ve\
hicle. Your
engine type will tell you which chart to use, and your drivin\
g conditions will
tell you which schedule to use. The charts are found later in\
this section.
Selecting the Proper Maintenance Chart
Your engine type (Gasoline or Diesel) and its emissions classificat\
ion (Light
Duty 3r Heavy Duty Emissions) will tell you which maintenance \
chart
to use.
Find your Vehicle Identification Number (VIN), and look at th\
e eighth character
to see what your engine code is. Then use the following Engine E\
missions
Classifications table
to find your emissions classification.
Your VIN is on the plate on the top left corner of your instrument panel,
the Certification Label and on the Service Parts Identification \
Label. See “Vehicle Identification Number” in the Index.
If your engine has more than one emissions classification, look at\
your
Certification Label to see what your Gross Vehicle Weight Ratin\
g
(GVWR)
is. See “Loading Your Vehicle” in the Index.
7-4
ProCarManuals.com

Scheduled Maintenance Services
Periodic Maintenance Inspections
Listed below are inspections and services which should be perfo\
rmed at least
twice a year (for instance each spring or fall).
You should let your GM
dealer’s service department or other qualified service center \
do these jobs.
Make sure any necessary repairs are completed at once.
Steering and Suspension lnspectiont -Inspect front and rear suspension
and steering system for damaged, loose or missing parts, signs \
of wear or
lack of lubrication. Inspect power steering lines and hoses for proper \
hook-up,
binding, leaks, cracks, chafing, etc. (On vehicles equipped wit\
h manual
steering gear, check for seal leakage.) Lubricate the steering linkage.
Accelerator Control System -Lubricate all pivot points with engine oil,
except the
TBI throttle shaft. Remove all external deposits from the injector
pump face cam on 6.2L and 6.5L engines.
Do this when the engine is cold
and not running.
Do not oil any accelerator or cruise control cables. Replace
any cables that have high effort or excessive wear.
Exhaust System Inspection -Inspect the complete system including the
three-way catalytic converter. Inspect the body near the exhaust\
system. Look
for broken, damaged, missing or out-of-position parts, as well \
as, open
seams, holes, loose connections or other conditions which could \
cause a heat buildup in the floor pan or could let exhaust fumes seep into the passenger
compartments.
Drive Axle Service -Check readfront axle fluid level and add as needed.
Check constant velocity joints and axle seals for leaking.
Transfer Case (four-wheel drive) lnspectiont -Every 12 months or at oil
change intervals, check front axle and transfer case and add l\
ubricant when necessary. Oil the control lever pivot point and all exposed c\
ontrol linkage.
Check vent hose at transfer case for kinks and proper installa\
tion. More
frequent lubrication may be required on heavy-duty or off-road use.
tA fluid loss in these systems may indicate a problem. Have them inspected
and repaired at once.
7-24
ProCarManuals.com

1 Add-on Equipment ................... 6-94
I- Electronic Heatinghir Conditioning
(See "Heating")
Adding Coolant
... 5.12, 5.14. 6-44
... Engine I
Air Cleaner ................................ 6-31
Block Heater
.......... 2.19. 3.5. 6-26
Cold Weather Starting (Diesel)
.................... 2-1 7
Coolant
....... 5.12. 5-1 4. 6.42. 6-96
Coolant Temperature Gage
...... 2-88
Diesel
................................ 6.6. 6-1 9
Crankcase
.................................. 6-96
Fan Noise
.................................. 5-1 7
Noise Control System
.............. 6-1 9
.-Identification,
............................ 6-95
Oil .(See "Oil")
Overheating
................................. 5-9
Running While Parked
............. 2-35
Equipment, Add-on
...................... 6-69
Exhaust System
................ 2.34, 6-65
Exhaust
........................... 2.34,
6-65
Starting
............................ 2.12, 2-1 5
F
Fan Noise ...................................... 5-1 7
Filter
. Replacement Chart ............ 6-99
Finish Care
............................................ 6-88
Damage
..................................... 6-90
Automatic Transmission
........... 6-33
Brake
.......................................... 6-49
Coolant
............................ 5-1 2. 6-42
Front Axle
.................................. 6- 40
Hydraulic Clutch
....................... 6-37
Leak Check
................................ 6-52
Manual Transmission
................ 6-36
Power Steering
............ 1 ............ 6-46
Radiator
....................................... 5-1 4
Fluid
9-3
Rear Axle .................................. 6-41
Recommended Fluids
.............. 7-25
. Transfer Case ............................ 6-39
Windshield Washer.
................. 6-48
Fog Lamps
.................................... 2-54 .
Four-wheel Drive ............... 2.36, 6-39
Transfer Case
................ .2-37, 6-39
Front Axle
................................. 6-40
Fuel (Diesel Engines)
..................... 6.6
Cold Weather Operation
............ 6-7
Filter Replacement
........ 6-1 1, 6.13,
6-99
Fuel Requirements
..................... 6-6
Gage
........................ ; ................. 2-87
Running Out Of
........................ 6-10
Tank Capacity
........................... 6-97
Water in Fuel
.............................. 627
Fuel (Gasoline Engines)
................. 6-4
Filling Your Ta'nk
....................... 6-16
Foreign
. Countries ..................... 6-15
Gage
.......................................... 2-87
Gasolines for Cleaner Air
......... 6-5 A-
Fuses and Circuit
Breakers
............................ 6-64, 6-1 01 * .
Fuse Block ................................ 6-65 . . f
Headlights .................... 6.64, 6-100
Power Windows and Other
Trailer Wiring Harness
.. 6.64, 6-1 00
. Windshield Wipers ...... 6-64, 6-100
G
Gages ............................................ 2.87
Coolant Temperature Gage
..... 2-88
Fuel Gage
.................................. 2-87
Odometer
................................... 2-76
Oil Pressure Gage
..................... 2-89
Speedometer.
............................ 2-76
Tachometer
..................... 2.76, 2-78
Trip Odameter 2-77
Voltmeter
................................... 2-90
-
-.
I
Power Options ......... 6.64, 6-100 :
. ...........................
...
ProCarManuals.com

Towing
A Trailer ...................................... 4-55
Maintenance
.............................. 4-61
Recommendations
................... 6-72
Turn Signals
.............................. 4-59
Traffic Lights
................................... 4-8
Trailer Brakes
.............................. 4-58
Trailering Package
........................ 6-69
Transfer Case
..................... 2.37. 6-39
Transmission
Automatic
.................................. 2-2 1
Five-Speed Manual ........ 2.24. 2-25
Fluid
................................ 6.33. 6-36
Fluid. To Add
................. 6.35. 6-37
Four-wheel
Manual Shift Speeds
............... 2-28
Shift Light
.................................. 2-27
Torque Lock (Automatic Transmission)
............. 2.30. 4-51
Trip Odometer
............................... 2-77
Turn SignaVMuItifunction Lever
.. 2.42
Indicator
...................... 2.43. 2-86
Following Distance
................... 4.59
Wiring Harness
.............. 2.91, 6-64
(See “Four-Wheel Drive”)
Turn SignaVLane Change
V
Damage Warnings ...................... 0-3
Vehicle Identification Number
............... 6-93
Loading
...................................... 4-26
Symbols
...................................... 0-4
Ventilation System
......................... 3-2
Air Vents
...................................... 3-3
Voltmeter
....................................... 2-90
Tips
............................................... 3.2
W
Warning
and Indicator Lights .... 2-78
Devices. Other
............................ 5-3
Wheels Alignment and Tire
Balance
.................................... 6-82
Aluminum
.................................. 6-89
Hub Caps and
Wheel Nut Caps
..................... 5-24
Nut Torque ..................... 6.51. 6-95
Replacement
............................. 6-83
Used Replacement
................... 6-83
Windows
........................................ 2-39
Sliding Rear
.............................. 2-40
Swing-Out
.................................. 2-40
Windshield Washer
...................... 2-46
Washer Fluid
............................ 6-48
Winter Driving
.............................. 4-52
Wipers, Windshield
........ 2-45, 6-64, 6-100
Blade Chatter
............................ 6-88
Blade Inserts
............................ 6-52
Cleaning Blades
........................ 6-88
9-7
ProCarManuals.com