GMC SIERRA 1993 Owners Manual

MAINTENANCE SCHEDULE It
If your driving conditions do NOT meet those specified in “Scheduled
Maintenance Services” in this section, use Maintenance Schedule
II (4.
THE SERVICES SHOWN ON THIS CHART UP TO 60,000 MILES (100 000 km)
ARE TO BE DONE AFTER 60,000 MILES AT THE SAME INTERVALS.
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Scheduled Maintenance Services
GASOLINE ENGINES WITH HEAVY DUTY EMISSIONS-
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MAINTENANCE SCHEDULE Ilt
If your driving conditions do NOT meet those specified in “Scheduled
Maintenance Services” in this section, use Maintenance Schedul\
e
II h),
54 57 60
90 95 100
.e
e e
e
e
e
e
THE SERVICES SHOWN ON THIS CHART UP TO 60,000 MILES (100 000 km)
ARE TO BE DONE AFTER 60,000 MILES AT THE SAME INTERVALS.
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6.2L AND 6.5L DIESEL ENGINES-
-0OTNOTES:
rt Change filter every 15,000 miles (24 000 km), except when operating in dusty
conditions. Dusty conditions may require more frequent filter re\
placement. Extreme
dust and dirt operating conditions (off-road), may require the air filter
to be
checked as often as every 300 miles (483 km) and replaced as necessary.
* An Emission Control Service
** See “Explanation of Scheduled Maintenance Services” in this section.
1 Applicable only to trucks sold in the United States.
A Also, a Noise Control Service (applicable to vehicles with engine VIN Code J).
t This maintenance schedule applies to all diesel engines available. TO330
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MAINTENANCE SCHEDULE It
If your driving conditions do NOT meet those specified in “Scheduled
THE SERVICES SHOWN ON THIS CHART UP TO 60,000 MILES (100 000 km)
ARE TO BE DONE AFTER 60,000 MILES AT THE SAME INTERVALS.
TO341
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Scheduled Maintenance Services
6.2L AND 6.5L DIESEL ENGINES-
If your driving conditions meet those specified in “Scheduled Ma\
intenance Services” in this section, use Maintenance Schedule
I (4.
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MAINTENANCE SCHEDULE Ilt
THE SERVICES SHOWN ON THIS CHART UP TO 60,000 MILES (100 000 km)
ARE TO BE DONE AFTER 60,000 MILES AT THE SAME INTERVALS.
TO336
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Scheduled Maintenance Services
Explanation Of Scheduled Maintenance Services
Below are explanations of the services listed in the maintenance charts.
The proper fluids and lubricants to use are listed in this section. Make sure
whoever services your vehicle uses these. All parts should be \
replaced and
all necessary repairs done before you or anyone else drives the ve\
hicle.
1.
ENGINE OIL AND OIL FILTER CHANGE* -ALWAYS USE SG OR
SGKE QUALITY, ENERGY CONSERVING II OILS OF THE PROPER
VISCOSITY. To determine the preferred viscosity oil for your vehicle’s
engine (e.g. SAE 5W-30 or 10W-30), see “Engine Oil” in the Index.
2. CHASSIS LUBRICATION -Lubricate the front suspension, king pin
bushings, steering linkage, transmission, and transfer case shift\
linkage,
parking brake cable guides, propshaft splines (2 wheel drive), brake
pedal springs, and clutch pedal springs at the intervals specified.
If you have a 3500 HD, lubricate the king pins and king pin bushings
every 1,500 miles
(2500 km) for Maintenance Schedule 1, or every 3,000
(5000 km) for Maintenance Schedule 2.
Ball joints and king pin bushings should not be lubricated unless their
temperature is
10°F (-12”C), or higher. When the weather is cold, let
them warm up before lubrication or they could be damaged.
Also, be sure to check
all the vehicle fluid levels at this time.
3.
CLUTCH FORK BALL STUD LUBRICATION -Lubricate the clutch fork
ball stud through the fitting on the clutch housing. Lubricant must be
added “sparingly” to the fitting, as only.
0066 Ib. (.003 kg) is required to
lubricate the ball stud surface.
Do not add lubricant more often than the
intervals in the Maintenance Charts.
Too much lubricant will damage
the clutch assembly.
4. ENGINE IDLE SPEED ADJUSTMENT (DIESEL ENGINES)* -Adjust to
the specifications shown on the underhood label. You must use
calibrated test equipment.
5. COOLING SYSTEM SERVICE* -Drain, flush and refill system with new
coolant. See “Engine Coolant’’ in the Index for the proper coolant and
mixture to use in your vehicle.
Also inspect the hoses and replace them
if they are cracked, swollen, or
deteriorated. Tighten all hose clamps (except constant tension \
clamps).
Remove debris and clean the outside
of the radiator and air conditioning
condenser. Wash the radiator neck.
To ensure proper operation, pressure
test the radiator and cap.
* An Emission Control Service
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6. AIR CLEANER FILTER REPLACEMENT* -Replace at every 30,000
miles (50 000 km) or more often under dusty conditions. Ask your dealer
for the proper replacement intervals for your driving conditions\
.
7. FRONT WHEEL BEARING REPACK (2 WHEEL DRIVE ONLY) -Clean
and repack the front wheel bearings at each brake relining, or\
at the specified interval, whichever comes first.
8.
TRANSMISSION SERVICE
Automatic Transmission
-Change the transmission fluid and filter every
15,000 miles (25 000 km) for vehicles under 8,600 GVWR or every
12,000 miles (20 000 km) for vehicles over 8,600 GVWR if the vehicle
is mainly driven under one or more of these conditions:
In heavy city traffic.
Where the outside temperature regularly reaches 90°F (32°C\
) or
higher.
In hilly or mountainous terrain.
Frequent trailer pulling.
Uses such as taxi, police, delivery or other commercial service\
.
If the vehicle is not used mainly under any of these conditions, change
the fluid and filter every 30,000 miles
(50 000 km) for vehicles under
8600 GVWR or every
24,000 miles (40 000 km) for vehicles over 8600
GVWR. See “Automatic Transmission Fluid” in the Index for more
information.
Manual Transmission -Transmission fluid does not require periodic
changing.
Regulator Valve System for any worn, plugged or collapsed hoses. Have
the system checked as described in the Service Manual.
9.
CDRV SYSTEM INSPECTION* -Check
the Crankcase Depression
10. FUEL FILTER REPLACEMENT* -Replace the fuel filter at the specified
interval
or sooner if clogged.
11. SPARK PLUGS REPLACEMENT* -Replace spark plugs with the type
listed in Section
6. See “Specification Charts” in the Index.
12.
SPARK PLUG WIRE INSPECTION* -Clean wires and inspect for burns,
cracks or other damage. Check the wire boot fit at the distributor and at
the spark plugs. Replace wires as needed.
*An Emission Control Service
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Scheduled Maintenance Services
13. EGR SYSTEM INSPECTION* -Conduct EGR SYSTEM CHECK as
described in the Service Manual.
14. ELECTRONIC VACUUM REGULATOR VALVE (EVRV) INSPECTION*
-Inspect filter for excessive contamination or plugging. If required, clean
element with a solution of biodegradable soap and water, let
dry and
reinstall element.
15. ENGINE TIMING CHECK AND DISTRIBUTOR CHECK (SOME
MODELS)”
-Adjust timing to underhood label specifications. Inspect the
inside and outside of the distributor cap and rotor for cracks, carbon
tracking and corrosion. Clean or replace as needed.
cap and lines for damage or leaks. Remove fuel cap, inspect g\
asket for
an even filler neck imprint, and any damage. Replace parts as \
needed.
16. FUEL TANK, CAP AND LINES INSPECTION* -Inspect the fuel tank,
17. THERMOSTATICALLY CONTROLLED AIR CLEANER INSPECTION*
A-(If so equipped.) Inspect all hoses and ducts for proper hookup.
Make sure valve works properly.
Look for cracks, fraying, wear, and proper tension. Adjust or replace as
needed.
19. EVAPORATIVE CONTROL SYSTEM (ECS) INSPECTION* -Check all
fuel and vapor lines and hoses for proper hookup, routing, and\
condition.
Check that the purge valve works properly,
if equipped. Replace as
needed.
18. ENGINE ACCESSORY DRIVE BELT(S) INSPECTION* --Inspect belts.
20. SHIELDS AND UNDERHOOD INSULATION INSPECTION Am-Inspect
shields and underhood insulation for damage or looseness. Adjust\
or
replace as required.
21. AIR INTAKE SYSTEM INSPECTlONAWCheck the air intake system
installation to see that gaskets are seated properly and all hose
connections, fasteners, and other components are tight. Also check to be
sure that the air cleaner housing is properly seated, that the\
cover fits
tightly, and the wing nuts are tight. Tighten connections and \
fasteners or
replace damaged parts as required.
22. THERMOSTATICALLY CONTROLLED ENGINE COOLING FAN INSPECTI0NA.-(If
so equipped.) With the engine off and below
normal operating temperature, check to see that the fan can be rotated
by hand on fluid coupling or viscous drives. Replace as necessary.
*An Emission Control Service
AAlso a Noise Emission Control Service
.Applicable only to vehicles
sold in the United States
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