1994 CHEVROLET SUBURBAN Owners Manual

GASOLINE ENGINES WITH HEAVY DUTY EMISSIONS
- MAINTENANCE SCHEDULE Iff
* An Emission Control Service
** See “Explanation of Scheduled Maintenance Services” in the Index.
A A Noise Emission Control Service
H Applicable only to vehicles sold in the United States
t To determine the emissions classification of your engine, refer to “Selecting the Proper
Maintenance Chart” in this section.
TO406
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GASOLINE ENGINES WITH HEAVY DUTY EMISSIONS
- MAINTENANCE SCHEDULE IFl (continued)
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DIESEL ENGINES - MAINTENANCE SCHEDULE fi
* Change filter every 15,000 miles (24 000 km), except when operating i
conditions. Dusty conditions may require more frequent filter re\
placem
dust and
dirt operating conditions (off-road), may require the air filter tl
often as every 300 miles (483 km) and replaced as necessary.
* An Emission Control Service
** See “Explanation of Scheduled Maintenance Services” in this section.
A A Noise Emission Control Service
Applicable only to vehicles sold in the United States
t This maintenance schedule applies to all diesel engines available.
T0408D0908
I dusty
nt. Extreme
1 be checked as
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DIESEL ENGINES - MAINTENANCE SCHEDULE t"f
(continued)
THE SERVICES SHOWN ON THIS CHART UP TO 60,000 MILES (I00 000 km) ARE TO BE
DONE AFTER
60,000 MILES AT THE SAME INTERVALS.
T0409lT0909
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DlES€L ENGINES - MAINTENANCE SCHEDULE Ifi
Item
No.
1
-
8 CDRV System Inspection*
9 Fuel Filter Replacement*
12 EGR System Inspection*
17 Engine Accessory Drive (Serpentine) Belt Inspection*
19 Shields and Underhood Insulation
20 Air Intake System InspectionAD
0 0
InspectionAH 0 0
21 Thermostatically Controlled Engine Cooling Fan 0 0
CheckAH-Every 12 Months or
22 Exhaust Pressure Regulator Valve
Inspection*
23 Tire and Wheel Rotation**
0 0
24 Drive Axle Service** 0 0 0 0
25 Brake Systems Inspection**
* An Emission Control Service
** See “Explanation of Scheduled Maintenance Services” in this section,
A A Noise Emission Control Service
H Applicable only to vehicles sold in the United States.
t This maintenance scheduled applies to all diesel engines available.
TO4
1 Oflo91 0
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DIESEL ENGINES - MAINTENANCE SCHEDULE 1fl
(continued)
THE SERVICES SHOWN ON THIS CHART UP TO 60,000 MILES (1 00 000 km) ARE TO BE
DONE AFTER 60,000 MILES AT THE SAME INTERVALS.
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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 vehicle.
1. ENGINE OIL AND OIL FILTER CHANGE* -ALWAYS USE SH
ENERGY CONSERVIJTG TI (GASOLINE ENGINE) OR CF-4/SH
(DIESEL ENGINE) QUALITY OILS OF THE PROPER VISCOSITY.
To determine the preferred viscosity oil for your vehicle’s engine
(e.g.
SAE 5W-30 or low-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, rear driveline center splines and
front axle propshaft splines, brake pedal springs, and clutch pedal
springs at the intervals specified.
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 (5-SPEED
MANUAL TRANSMISSION
WITH DEEP LOW ) - Not
applicable to utility or wagon models.
4. 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.
5. 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.
6. 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.
4’ An Emission Control Service
*A fluid loss in these systems may indicate a problem. Have them
inspected and repaired at once.
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7. 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.
0 Where the outside temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
Frequent trailer pulling.
0 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
8,600 GVWR or every 24,000 miles (40 000 km) for vehicles over
8,600 GVWR see “Automatic Transmission Fluid” in the Index for
more information.
Manual Transmission - Transmission fluid does not require periodic
changing.
8. CDRV SYSTEM INSPECTION* - Check the Crankcase
Depression Regulator Valve System for
any worn, plugged or collapsed
hoses. Have the system checked as described in the Service Manual.
9. FUEL FILTER REPLACEMENT*$ - Replace the fuel filter at the
specified interval or sooner if clogged.
10. SPARK PLUG REPLACEMENT* - Replace spark plugs with the
type listed in Section
6. See “Specification Charts” in the Index.
1 1. 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
$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 useful life.
General Motors, however, urges that all recommended maintenance
services be performed at the indicated intervals and the maintenance be
recorded.
?A fluid loss in
these systems may indicate a problem. Have them
inspected and repaired at once.
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