1994 GMC SIERRA cooling

DIESEL ENGINES - MAINTENANCE SCHEDULE yf
20 Air Intake System InspectionAB t t
21 Thermostatically Controlled Engine
Cooling Fan CheckAW-Every
t t
12 Months or
Inspection*
22 Exhaust Pressure Regulator Valve
23 Tire and Wheel Rotation**
t
24 Drive Axle Service** t t t +
25 Brake Systems Inspection**
A Change filter every 15,000 miles (24 000 km), except when op\
erating
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.
A A Noise Emission Control Service
1 Applicable only to vehicles sold in the United States
t This maintenance schedule applies to all diesel engines available.
T0408/T0908
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Explanation Of Scheduled Mainienance 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
SJ3 ENERGY CONSERVING I1 (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 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, rear driveline center splines and
front axle propshaft splines, 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 I, or every
3,000 (5000 km) for Maintenance Schedule 11.
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
) - Lubricate the
clutch fork ball stud through the fitting
on the clutch housing.
Lubricant must be added “sparingly” to
the fitting, as only .0066 lb.
(.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. 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
?A fluid
loss in these systems may indicate a problem. Have them
inspected and repaired at once.
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18. 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.
19.
SHIELDS AND UNDERHOOD INSULATION
INSPECTIONAV
- Inspect shields and underhood insulation for
damage or looseness. Adjust or replace as required.
system installation
to see that gaskets are sealed 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.
20. AIR INTAKE SYSTEM INSPECTIONAV - Check the air intake
2 1. THERMOSTATICALLY CONTROLLED ENGINE COOLING
FAN INSPECTIONAV
- (If so equipped.) Inspect all hoses and
ducts for proper hook-up. Be sure the valve works properly.
22. EXHAUST PRESSURE REGULATOR VALVE INSPECTION”
- Check that the valve works properly. Correct any binding. Inspect
hoses for cracks, chafing
or decay. Replace parts as needed.
23. TIRE AND WHEEL ROTATION AND INSPECTION - For
proper wear and maximum tire life, rotate tires at the first
6,000 miles
( 10 000 kilometers) for Schedule I (+) or 7,500 miles (1 2 500
kilometers) for Schedule IT (0) and then every 15,000 miles (25 000
kilometers) thereafter. Follow the instructions and patterns shown in
Section 6. Check tires for uneven wear or damage. If irregular or
premature wear is apparent, check wheel alignment. Also, check or
damaged wheels. See “Tires”
in the Index for more information.
For dual wheels, whenever the vehicle, wheels, or fasteners are new,
have the wheel fastener torque set at the first
100, 1,000 and 6,000
miles (1 60, 1600 and 10 000 km).
Block the tires opposite those being removed to keep the vehicle from
rolling.
‘i: An Emission Control Service
ANoise Emission Control Service
VApplicable only to vehicles sold
in the United States
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Secondary
Hood Release
See Page 6-15.
Fluid
See Page 6-45.
engines, use 87
octane (or higher)
unleaded gasoline
only.
For diesel engines,
use at least
1 D
diesel fuel. For fuel
tank capacity
See Page 6-93.
Cold Tire /
Pressure
See the
Certificationflire
label on the
inside rear edge
of the driver's
door.
See Page 6-65,6-71.
, Battery
Your vehicle's
Delco Freedom
battery never
needs to have water added.
See Page 6-52.
Cooling System
coolant only at
the coolant
recovery tank
(gasoline engine)
or
only at the
coolant surge
tank (diesel engine). The
fluid
level should be at
the COLD mark.
See Page 6-38.
3 Check and add

Transmission
Fluid
See Page 6-30.
- Spare Tire
Pressure
See the
Certificatisnflire
label on the inside
rear edge
of the
driver's door.
See Page 6-71.
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C
Camper Wiring Harness ........................................... 2-83
Capacities/Specification Charts ..................................... 6-91
CarbonMonoxide
............................................... 2-33
CargoLamp
.................................................... 2-52
Cassette Tape Player (see “Audio Systems”
)
Catalyticconverter .............................................. 6-64
Certificationire Label
........................................... 6-65
Changing a Flat Tire
......................................... 5-26, 5-32
Chemical Paint Spotting
........................................... 6-87
Child Restraints (See “Safety Belts”)
CHMSLFeedWire
.............................................. 2-82
Cigarette LightedAshtrays
..... ................................... 2-52
Circuit Breakers (See “Fuses”)
Cleaning
Finishcare
.................................................. 6-85
Glass
....................................................... 6-84
Insideofvehicle
.............................................. 6-81
Instrumentpanel. Top
.......................................... 6-83
Outsideofvehicle
............................................. 6-84
Special Problems
.............................................. 6-82
VinylorLeather
.............................................. 6-83
Wheels and Tires
.............................................. 6-86
Windshield
.................................................. 6-84
Clock
......................................................... 3-18
AM-FM Stereo Audio System with Cassette Deck
................... 3-11
AM-FM Stereo Audio System with Cassette Deck and Equalizer
... 3-14. 3-18
Conversion to Chassis Cab
........................................ 6-70
Coolant (See “Engine”)
Cooling System Capacity
.......................................... 5-17
Crankcase Capacity
.............................................. 6-93
Increasespeed
............................................... 2-46
CruiseControl
.................................................. 2-44
EraseSpeedMemory .......................................... 2-48
OnHills
..................................................... 2-48
Passing
..................................................... 247
Reducespeed
................................................ 2-47
Resume
..................................................... 2-46
Set
......................................................... 2-45
ToGetOutOf
................................................ 2-48
Customer Assistance for the Hearing or Speech Impaired
................. 8-3
Customer Satisfaction Procedure
..................................... 8-2
Daytime Running Lights (Canada Only)
......................... 2.50, 2.75
Indicator Light
.......................................... 2.50. 2.75
Diesel Fuel (See “Fuel”)
DomeLights
.................................................... 2-51
Doors
.......................................................... 2-7
Locks ........................................................ 2-5
Driving Across an Incline
............................................. 4-21
After Off-Road Driving
........................................ 4-22
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