1993 CHEVROLET BLAZER air filter

Service & Appearance Care
oil. If time determines when you change your oil, change the filter ea\
ch time
you change your oil.
Engine Block Heater:
An engine block heater can be a big help if you have to park outside in very
cold weather,
0°F (-18°C) or colder. If your vehicle has this option, see
“Engine Block Heater” in the Index.
What to Do with Used Oil:
Used engine oil contains things that have caused skin cancer in
laboratory animals. Don’t let
used oil stay on your skin for very long.
Clean
your skin and nails with soap and water, or a good hand ,,:: :‘:-;
cleaner. Wash or properly throw away clothing or rags containing-:’-:;$ ~
used engine oil.
. ,A:<< --.
L. .. . .. ,-. f .- , L ., -J ’,: ._ - -
..:.: ;,i, j I -.. : j ,!
Used oil can be a real threat to the environment. If YOU change your own oil,
be sure to drain all free-flowing oil from the filter before disposal. Don’t ever
dispose of oil by putting it in the trash, pouring it on the ground, into sewers,
or into streams or bodies of water. Instead, recycle it by taking it to a place
that collects used oil. If you have a problem properly disposing of your used
oil, ask your dealer, a service station or a local recycling center for help.
Air Cleaner
c
PO21 6
Refer to the Maintenance Schedule to determine when to replace the air
cleaner filter and crankcase ventilation filter. See “Schedule\
d Maintenance Services” in the Index.
6-1 6

I CAUTION
I 10 Operating the engine with the air cleaner off can cause you or others
to be burned. The air cleaner not only cleans the air, it
stops flame
if the engine backfires.
If it isn’t there, and the engine backfires, y(--
could be burned. Don’t drive with it
off, and be cr-ful working on
the engine with the air cleaner
off.
~
NOTICE I
If the air cleaner is off, a backfire can cause a damaging engine fire. And,
dirt
can easily get into your engine, which will damage it. Always have the
air cleaner
in place when you’re driving.
Ib remove the air cleaner filter on a gas engine, turn the wing nuts
counterclockwise. Remove the cover and change the filter.
-
Automatic Transmission Fluid
When to Check and Change:
A good time to check your automatic transmission fluid level is when the
engine
oil is changed. Refer to the Maintenance Schedule to determine when
to change your fluid. See “Scheduled Maintenance Services” in \
the Index.
How to Check:
Because this operation can be a little difficult, you may choose to have this
done at a General Motors dealership Sewice Department.
If you do it yourself, be sure to follow all the instructions here, or you could
get
a false reading on the dipstick.
NOTICE I
I
Too much or too little fluid can damage your transmission. Too much can
mean that some of the fluid could come out and fail
on hot engine parts,
I
starting a fire. Be sure to get an accurate reading if you check-your
transmission fluid.
Wait at least
30 minutes before checking the transmission fluid level if you
have been driving:
When outside temperatures are above 90°F (32°C).
At high speed for quite a while.
In heavy traffic-especially in hot weather.
While pulling a trailer.
6-1 7

Crankcase Capacify
QUANTITY*
ENGINE VIN CODE Without Filter With Filter
5.7L K 4 Quarts (3.8 Liters) 5 Quarts (4.8 Liters)
7.4L N 6 Quarts (5.7 Liters) 7 Quarts (6.6 Liters)
*All quantities are approximate.
*After refill, the level MUST be checked as outlined under “\
Engine Oil
TO296
And Filter Recommendations” in Section
5.
Air Condifioning Refrigeranf Capacify
TYPE* QUANTITY
Refrigerant R-12 Front
AJC 3.0 Ibs. (1.360 kg)
Front and Rear AJC 4.25 Ibs. (1.927 kg)
*Not all air conditioning refrigerants are the same.
If the air conditioning
system in your vehicle needs refrigerant, be sure the proper r\
efrigerant is
used. If you’re not sure, ask your GM dealer. TO302
Fuel Tank Capacify
I -1
Utility Model-Standard 30 Gallons (113 Liters)
Wagon Model-Standard 42 Gallons (159 Liters)
All quantities are for a completely dry tank and are approxima\
te. TO2971
Service Replacemenf Part and Filfer Recommendations
5.7 (K)
6.2 (C)
6.2
(J)*
6.5 (F)*
-
Oil
Filter
PF5 1
PF35t PF35t
PF35
PF35
PF35
PF35
-
1
Air PCV
Cleaner Valve
A348C
cv774c
A348C cv774c
A644C
A644C
A91 7C
A348C cv774c
AI 7acw cv7agc
Spark**
Plugs
.CR43TS
.CR43TS
.CR43TS
-
.CR43TS i
use a PF51 oil filter
*Heavy Duty Emission Engine
**Use
AC copper-cored resistor type spark plugs.
Fuel
Filter
GF481
GF481
GF481
TP
1 006
TP 1 006
TP 1 006 G F48 1
Radiator
RC36
RC36
RC36
RC32
RC32
RC32
RC36
Cap
6-69

Scheduled Maintenance Services
GASOLINE ENGINES WITH LIGHT DUTY EMISSIONS-
If your driving conditions meet those specified in “Scheduled Ma\
intenancc
Services” in this section, use Maintenance Schedule
I (t).
Item Miles (000) 3 6 7.5 9 12 15 18
No. Service Kilometers (000) 5 10 12.5 15 20 25 30
1 Engine Oil Change*-Every 12 Months, or e
Oil Filter Change*-Every 12 Months, or e
2 Chassis Lubrication-Every 12 Months, or e
3 Clutch Fork Ball Stud Lubrication
5 Cooling System Service*-Every 24
6 Air Cleaner Filter Replacement* Months
or
7 Front Wheel Bearing Repack
8 Transmission Service**
25 Drive Axle Service**
26 Brake Systems Inspection**
FOOTNOTES:
**See “Explanation
of Scheduled Maintenance Services” in this section.
*An Emission Control Service
tTo determine the emissions classification of your engine refer to “Selecting
the
Proper Maintenance Chart”
in this section.
TO332

Scheduled Maintenance Services
6.2L AND 6.5L DIESEL ENGINES-
FOOTNOTES:
* 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.
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
7-1 4

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
SG/CE 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 specif\
ied.
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 unl\
ess 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 i cracked, swollen, or
deteriorated. Tighten all hose clamps (except consrant tension clamps).
Remove debris and clean the outside of the radiator and air c\
onditioning
condenser. Wash the radiator neck.
To ensure proper operation, pressure
test the radiator and cap.
* An Emission Control Service
7-1 8

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
In hilly or mountainous terrain.
higher.
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.
9. 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.
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
7-1 9

Scheduled Maintenance Services
13. EGR SYSTEM INSPECTION* -Conduct EGR SYSl /l 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.
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.
15. ENGINE TIMING CHECK AND DISTRIBUTOR CHECK (SOME
16. FUEL TANK, CAP AND LINES INSPECTION* -Inspect the fuel tank,
cap and lines
for damage or leaks. Remove fuel cap, inspect gasket for
an even filler neck imprint, and any damage, Replace parts as needed.
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.
20.
SHIELDS AND UNDERHOOD INSULATION INSPECTION Awlnspect
shields and underhood insulation for damage or looseness. Adjust
or
replace as required.
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.
18. ENGINE ACCESSORY DRIVE BELT(S) INSPECTION* --Inspect belts.
21.
AIR INTAKE SYSTEM INSPECTlONAWCheck the air intake system
22. THERMOSTATICALLY CONTROLLED ENGINE COOLING FAN INSPECTIONAB-(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
A Also a Noise Emission Control Service
Applicable only to vehicles sold in the United States
7-20