1994 CHEVROLET SUBURBAN Owners Manual

Engine Emissions Classification - Gas Engines
Engine
Type
VIN
Fuel System
Emissions
5.7L
V8
K
TBIT
LD*/HD**
7.44
V8
N
TBIT
LD*/HD**
*Light Duty Emissions with
8500 GVWR and below or:
**Heavy Duty Emissions with
8501 GVWR and above
?Throttle Body Injection
Engine Emissions Classification - Diese/ Engines
Engine
Type
VIN
Fuel System
Emissions
6.5L
V8
S
Turbo Diesel
LD
6.5L
V8
F
Turbo Diesel
HD
7-4
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Selecting the Proper Maintenance Schedule
Here is how to tell which schedule to follow once you find the proper
maintenance chart to
use.
MAINTENANCE SCHEDULE I
Is any one of these true for your vehicle?
Most trips are less than 4 miles (6 kilometers.)
Most trips are less than 10 miles (16 kilometers), and the outside
temperatures are below freezing.
The engine is at low speed most of the time (as in door-to-door
delivery, stop-and-go traffic, or commercial use).
0 You operate in dusty areas or off-road frequently.
You tow a trailer.
If
any one (or more) of these is true for your driving, follow Schedule I.
Schedule I is shown by a plus sign (+) on the chart.
MAINTENANCE SCHEDULE II
Follow Schedule I1 ONLY if none of the above conditions are true.
Schedule
I1 is shown by a dot (0) on the chart.
7-5 ProCarManuals.com

GASOLINE ENGINES WITH LIGHT DUTY EMISSIONS
- MAINTENANCE SCHEDULE tf
23
* An Emission Control Service Brake Systems Inspection**
25
ttttt-t Drive Axle Service** 24
t Tire and Wheel Rotation**
** See “Explanation
of Scheduled Maintenance Services” in the Index
$ The California Air Resources Board has determined that the fail\
ure to perform this
maintenance item will not nullify the emission warranty or limi\
t recall liability prior
to the
completion of vehicle useful life. General Motors, however, urges that all re\
commended
maintenance services be performed
at the indicated intervals and the maintenance be
recorded.
t To determine the emissions classification of your engine, refer to “Selecting the Proper
Maintenance Chart” in this section.
TO401 /TO90 1
7-6 ProCarManuals.com

GASOLINE ENGINES WITH LIGHT DUTY EMlSSlONS
- MAINTENANCE SCHEDULE fi (continued)
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.
T0402/T0902
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GASOLINE ENGINES WITH LIGHT DUTY EMISSIONS
- MAINTENANCE SCHEDULE Iv
Item
No.
1
2
3
4
5
6
7
9
10
11
14
15
17
23
24
25
*P
** s
$7
n
n r(
tT
hi
TO4031
C
Service
1 Emission Control Service
3e “Explanation of Scheduled Maintenance Services” in the Index.
le California Air Resources Board has determined that the failure to perform this
aintenance item
will not nullify the emission warranty or limit recall liability prior to the
)mpletion of vehicle useful life. General Motors, however, urges that all re\
commended
aintenance services be performed at the indicated intervals and \
the maintenance be
corded.
) determine the emissions classification of your engine, refer to “Selecting the Proper
aintenance Chart” in this section.
r0903
I
7-8
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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.
T0403a/T0903a
7-9 ProCarManuals.com

GASOLINE ENGINES WITH HEAVY DUTY EMISSIONS
- MAINTENANCE SCHEDULE yf
Item Miles (000) 3
No. Kilometers (000) 5 Service
I
1 Engine Oil Change*-Every 3 Months, or t
Oil Filter Change*-Every 3 Months, or t
12 Chassis Lubrication-Every 12 Months, or I+
II
3 Clutch Fork Ball Stud Lubrication (5-speed manual
transmission with deeplow only)
Cooling System Service*-Every 24 Months or
Air Cleaner Filter Replacement* Front Wheel Bearing Repack
Transmission Service
**
Fuel Filter Replacement*
10
11
12
13
14
15
16
17
18
I9
Spark Plugs Replacement*
Spark Plug Wire Inspection*
EGR System Inspection*
Electronic Vacuum Regulator Valve (EVRV)
Inspection*
Engine Timing Checkk
Fuel Tank, Cap and Lines Inspection
*
Thermostatically Controlled Air Cleaner
Inspectionk
Engine Accessory Drive (Serpentine) Belt
Inspection*
Evaporative Control System Inspection*
Shields and Underhood Insulation InspectionA.
20
21
-
23
24
-
Air Intake System InspectionA. I
Brake Systems Inspection** I
* An Emission Control Service
** See “Explanation of Scheduled Maintenance Services” in the Index.
A A Noise Emission Control Service
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.
TO404
7-10
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GASOLINE ENGINES WITH HEAVY DUTY EMISSIONS
- MAINTENANCE SCHEDULE # (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.
TO405
7-11 ProCarManuals.com