1994 CHEVROLET S10 check engine

Downloaded from www.Manualslib.com manuals search engine A Word About Maintenance
We at General Motors want to help you keep your vehicle in good \
working
condition. But we don’t know exactly how you’ll drive it. You may drive
very short distances only a few times a week. Or you may drive long
distances all the time
in very hot, dusty weather. You may use your vehicle
in making deliveries. Or you may drive it to work, to do errands, or in many
other ways.
Because of all the different ways’pWple use their GM vehicle\
s, maintenance
needs vary. You may even need more frequent checks and replacements than
you will find in the schedules in this section.
So please read this section and
note how you drive. If you have any questions on how to keep your vehicle
in good condition, see your GM dealer, the place many GM owners \
choose
to have their maintenance work done. Your dealer can be relied up\
on to use
proper parts and practices.
Your Vehicle And The Environment
Proper vehicle maintenance not only helps keep your vehicle in good
working condition, but it also helps the environment. All recommended
maintenance procedures
are important. Improper vehicle maintenance or the
removal of important components can significantly affect the quality of the\

air we breathe. Improper fluid levels or even the wrong tire infla\
tion can
increase the level
of emissions from your vehicle. To help protect our
environment, and to help keep your vehicle in good condition, \
please
maintain your vehicle properly.
If you are skilled enough to do some work on your vehicle, you
will
probably want to get the service information GM publishes. You will find a
list of publications and how to get them in Section
8, Customer Assistance
Information.
See “Service Publications” in the Index.
The Maintenance Record provides a place for you to record the maintenance
performed on your vehicle. Whenever any maintenance is performed\
, be
sure
to write it down in this section. This will help you determine when your
next maintenance should be done. In addition, it is a good idea to keep your
7-2

Downloaded from www.Manualslib.com manuals search engine 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
API SERVICE SH OR SG ENERGY CONSERVING I1 OILS
OF THE
PROPER VISCOSITY. The “SH” or
“SG’ designation may be shown
alone or in combination with others, such as “SWCD”, or
“SH, SG,
CD,” or “SGKD”, etc. To determine the preferred viscosity oil for your
vehicle’s engine (e.g. SAE 5W-30), see “Engine
Oil” in the Index.
2. CHASSIS LUBRICATION - Lubricate the front suspension, ball
joint, steering linkage, and transfer case shift linkage, parking brake\

cable guides, propshaft splines, universal joints, brake pedal springs,
and clutch pedal springs at the intervals specified on the proper
maintenance schedule, or at every engine oil change, whichever comes
first
.
Ball joints should not be lubricated unless their temperature is 10°F
(-12°C) or higher. When the weather is cold, let them warm up before
lubricating them or they could be damaged.
Also, be sure
to check all the vehicle fluid levels at this time.
3.
COOLING SYSTEM SERVICE* - Drain, flush and refill the
system with new or approved recycled coolant conforming to “\
GM
Specification 6038-M” (4.3L engine) or “GM Specification 6043-M”
(2.2L engine). 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. Clean the outside of the radiator and air conditioning
condenser. Wash the radiator neck. To ensure proper operation,
pressure test the radiator and cap.
4. AIR CLEANER FILTER REPLACEMENT* - Replace at
specified intervals. Ask your dealer for the proper replacement
intervals for your driving conditions.
5. FRONT WHEEL BEARING REPACK (%WHEEL DRIVE
ONLY) - Clean and repack the front wheel bearings at each brake
relining, or at the specified interval, whichever comes first.
*An Emission Control Service
7-7

Downloaded from www.Manualslib.com manuals search engine 6. TRANSMISSION SERVICE:
Automatic Transmission
- Change the transmission fluid and filter
every
15,000 miles (25 000 km) he vehicle is mainly driven under
one or more of these conditions:
0 In heavy city traffic.
0 Where the outside temperature regularly reaches 90°F (32°C) or
0 In hilly or mountainous terrain.
0 Frequent trailer pulling. higher.
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). See “Automatic
Transmission Fluid” in the Index for more information.
Manual Transmission - Transrnission fluid does not require periodic
changing.
specified interval or sooner if clogged.
7. FUEL FILTER REPLACEMENT* - Replace the fuel filter at the
8. SPARK PLUG REPLACEMENT*$ - Replace spark plugs with the
type listed
in Section 6. Spark plugs (AC908) for the 2.2L Engine (VIN
Code 4) should be replaced every 100,000 miles (166 000 kilometers).
Spark plugs (.CR43TSM) for the 4.3L engines
(VIN Codes W and Z)
should be replaced every 30,000 miles (50 000 kilometers). See
‘‘Specification Charts” in the Index.
9. 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.
Adjust timing to underhood label specifications. Inspect the ins\
ide and outside
of the distributor cap and rotor for cracks, carbon tracking and
corrosion. Clean or replace as needed.
10. ENGINE TIMING CHECK AND DISTRIBUTOR CHECK*$ -
*An Emission Control Service
$=The California Air Resources Board has detennined that the fa\
ilure to
perform this maintenance item will not nullify the emission war\
ranty or limit recall liability prior to the completion
of vehicle usefui life. General
Motors, however, urges that all recommended maintenance services \
be
performed at the indicated intervals and the maintenance be rec\
orded.
7-8

Downloaded from www.Manualslib.com manuals search engine Owner Checks and Services
Listed below are owner checks and services which would be made\
at the
time period specified to help ensure proper safety, emission pe\
rformance,
and dependability
of your vehicle.
Be sure any necessary repairs
are completed at once. Whenever any fluids
or lubricants are added to your vehicle, make sure they are t\
he proper ones,
as shown in this section.
At Least Once a Month
Tire Inflation Pressure Check - Check the tires for proper inflation. If
they
are low, inflate them to the level specified on the Certification \
label.
See “Inflation-Tire Pressure” in the Index.
At feast Four Times a Year
Tailgate Lubrication - Lubricate tailgate latch bolt, handle assembly pivot
points, and hinges with lubricant recommended in
this section. Lubricate
every
3,000 miles (5 000 kilometers) if following Maintenance Schedule I, or
every
7,500 &les (12 500 kilometers) if following Maintenance Schedule II.
At Least Once a Year
Key Lock Cylinder Lubrication - Lubricate key lock cylinders with one
of the lubricants recammended in
this section.
Transmission Neutral or Clutch Start Switch Operation -
1.
2.
3.
4.
Before you start, be sure you have enough room around the veh\
icle.
Firmly apply both the manual parking brake, and the regular br\
ake. See
“Brakes” and “Parking Brake” in the Index.
Do not use the accelerator
pedal.
Be ready to
turn off the engine immediately if it starts.
On automatic transmission vehicles,
try to start the engine in each gear.
The starter should work only in
T“ (Park) or “N’ (Neutral).
On manual transmission vehicles, put the shift lever in “N’ (Neutral),
push the clutch down halfway, and
try to start the engine. The starter
should work only when the clutch is pushed down
all the way to the floor.
7-10

Downloaded from www.Manualslib.com manuals search engine Steering Column Lock Operation - While parked, try to turn the key to
LOCK in each gear shift position.
With an automatic transmission, the key should turn to LOCK only
0 With manual shift, the key should turn to LOCK only wnen you’re in
On vehicles with a key release lever, try to turn the key to
LOCK without
pressing the lever. The key should turn to
LOCK only with the key lever
depressed.
On
all vehicles, the key should come out only in LOCK.
when the gear shift is in “P’ (Park).
“R’ (Reverse).
Parking ‘Brake and Transmission “P’ (Park) Mechanism Operation -
Park on a fairly steep hill, with the vehicle facing downhill. Keeping your
foot on the regular brake, set the manual parking brake.
0
0 To check the parking brake: With the engine running and the
transmission
in “N” (Neutral), slowly remove foot pressure from the
regular brake pedal.
Do this until the vehicle is held by the parking
brake only.
To check the
“P’ (Park) mechanism’s holding ability: Apply the regular
brake and shift to
“P’ (Park). Release the manual parking brake, then
slowly release the regular brake.
Lap and Shoulder Belts Condition and Operation - Inspect belt system,
including: webbjng, buckles, latch plates, retractors, guide loops and
anchors. Have a belt assembly replaced
if the webbing has been cut or
otherwise damaged.
Body Lubrication Service - Lubricate all body door hinges including the
tailgate and tailgate handle pivot points. Lubricate the body hood, fuel door
and rear compartment hinges, latches and locks including interio\
r glove box
and console doors, and any moving seat hardware. Lubricate the \
hood safety
lever pivot and prop rod pivot.
More frequent lubrication may be required
when exposed to a corrosive environment.
7-11

Downloaded from www.Manualslib.com manuals search engine Periodic Maintenance Inspections
Listed below are inspections and services which should be perfo\
rmed at
least twice a year (for instance, each spring and 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 Inspection? - 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.
Lu‘ ~ kate the steering linkage.
Accelerator Control System - Lubricate all pivot points with engine oil,
except the
TBI throttle shaft. Do not lubricate the cam pulley. Remove all
external deposits from pulley.
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. Inspect the
body near the exhaust system. Look for broken, damaged, missing
or
out-of-position parts, as well as open seams, holes, loose conn\
ections or
other conditions which could cause a heat buildup in the
floor pan or could
let exhaust fumes seep into the passenger compartments. See “Engine
Exhaust” in the Index.
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) Inspection? - Every 12 months or at
oil change intervals, check front axle and transfer case and add l\
ubricant
when necessary. Check vent hose at transfer case
for kinks and proper
installation. More frequent lubrication may be required on off-road use.
7- 12
?A fluid loss in these systems may indicate a problem. Have them inspected
and repaired at once.

Downloaded from www.Manualslib.com manuals search engine Service Station Checks
It is important for you or a service station attendant to perform these
under-hood checks at each fuel fill.
@ Check the engine oil level and add if necessary.
Check the engine coolant level and add if necessary.
0 Check the windshield washer fluid level and add if necessary.
See the Index under these items for information on how to check them.

Downloaded from www.Manualslib.com manuals search engine Hood Release
Lever
See Page 6-6.
Remote Oil Filfer
See Page
6-1 3.
Windshield -
Washer Fluid
See Page 6-28.
Power Steering '
Reservoir
See Page 6-26.
,Battery
The Delco
Freedom battery
needs no water.
See Page 6-32. I 4
,Cooling Sysfem
Check and add
coolant
only at
the coolant
recovery tank.
See Page 6-23.
I fit-
Engine Oil
\see Page 6-9m Transmission
Fluid
Automatic:
See Page 6-15.
Manual:
See Page 6-18.
/ Clutch Fluid
Reservoir
See Page 6-20.
I
I c
/
,Fuel
Capacity 20 U.S.
Gal.
(7.6L). Use
unleaded gas
only,
87 octane
or higher.
See Page 6-3.
Brake Fluid.
Reservoir
See Page 6-29.
Cold TiFe
Pressure
See Tire-Loading
sticker
on the
inside
of the
rear edge
of
the driver's door lock pillar.
See Page 6-45.
Spare Tire /
Pressure
See Page 6-45.
7- 17