1994 GMC SIERRA engine

24. DRIVE AXLE SERVICE? - Check readfront axle fluid level and
add
as needed. Check constant velocity joints and axle seals for
leaking.
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0
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Locking differential - Drain fluid at first oil change and refill.
Check fluid level and add
as needed at subsequent oil changes. In
dusty areas, or trailer towing applications drain fluid at every
15,000 miles (24 135 kilometers) and refill.
Standard differential - Check fluid level and add as needed at
every
oil change. In dusty areas, or trailer towing applications,
drain fluid every
15,000 miles (24 I35 kilometers) and refill.
More frequent lubrication may be required on heavy-duty or
off-road use.
3500 HD Models - 3500 HD Models with applications requiring
extreme overload/trdiler tow conditions
and high speed conditions
(above 45 mph (72
kdh)) for extended periods of time must
change drive axle fluid every
3,000 miles (4828 kilometers) or 3
months, whichever comes first, OR must use 75W-140 synthetic
fluid meeting
GM specifications. See “Recommended Fluids and
Lubricants” at the end of this section for the proper fluid to use.
25.
BRAKE SYSTEM INSPECTION-f - When the engine oil is
changed, inspect the lines and hoses for proper hookup, binding, leaks,
cracks, chafing, etc. Check the parking brake adjust, and the fluid level
in the master cylinder. A low fluid level can indicate worn disc brake
pads which may need
to be serviced.
When the wheels are removed for rotation, inspect disc brake pads for
wear and rotors for surfxe condition. Also inspect drum brake linings
for wear and cracks. Inspect other brake parts, including drums, wheel
cylinders, parking brake, etc., at the same time. Remove any
rust or dirt
from the wheel and mounting surfaces before mounting the wheel.
Inspect brakes more often if driving habits or conditions result in
frequent braking.
?A fluid loss in these systems may indicate a problem. Have them
inspected and repaired at once.
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Owner Checks and Services
Listed below are owner checks and services which should be made at the
time period specified to help ensure proper safety, emission performance,
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
the 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/Tire
label. See “Loading Your Vehicle” or “Inflation-Tire Pressure”
in the Index.
At Least Once a Year
Key lock cylinder lubrication - Lubricate key lock cylinders with engine
oil. See
the “Recommended Fluid and Lubricants” chart in this section.
Transmission neutral or clutch start switch operation -
1. Before you start, be sure you have enough room around the vehicle.
2. Firmly apply both the manual parking brake and the regular brake. See
“Brakes” and “Parking Brake”
in the Index. Do not use the accelerator
pedal.
3. Be ready to turn off the engine immediately if it starts.
4. On automatic transmission vehicles, try to start the engine in each gear.
The starter should work only
in “P’ (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.
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 when
the gear shift
is in “P” (Park).
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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.
Parking brake and transmission
“P” (PARK) mechanism operation -
I
Park on a fairly steep hill, with the vehicle facing downhill. Keeping your
foot on the regular brake, set the manual parking brake.
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.
0 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 webbing, 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 with engine
oil. Also lubricate the tailgate, tailgate handle pivot points, and tailgate
mounted spare tire carrier
(if equipped}. Lubricate the body hood, fuel door
and rear compartment hinges, latches and locks including interior glove box
and console doors, and any folding seat hardware. Lubricate the hood safety
lever pivot and prop rod pivot. More frequent lubrication may be required
when exposed to a corrosive environment.
Periodic Maintenance Inspections - Listed below are inspections and
services which should be performed at least twice
a year (for instance each
spring or 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.
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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. Lubricate the steering linkage.
Accelerator Control System - On gasoline engines, lubricate the pivot at
the
TBI throttle lever stud with engine oil. 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 including the
three-way catalytic converter. Inspect the body near the exhaust system.
Look for broken, damaged, missing or out-of-position parts,
as well as,
open seams, holes, loose connections or other conditions which could cause
a heat buildup in
the floor pan or could let exhaust fumes seep into the
passenger compartments.
Drive Axle Service? - Check readfront axle fluid level and add as needed.
Check constant velocity joints and axle seals for leaking.
I-- ~ lsfer Case (Four-wheel Drive) Inspection? - Every 12 months or at
oil change intervals, check front axle and transfer case and add lubricant
when necessary. Oil the control lever pivot point and all exposed control
linkage. Check vent hose at transfer case for kinks and proper installation.
More frequent lubrication may be required
on heavy-duty or off-road use.
?'A fluid loss in these systems may indicate a problem. Have them inspected
and repaired at once.
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Recommended Fluids & Lubricants
NOTE: Fluids and lubricants identified below by name, part number or
specification may be obtained from your GM Dealer.
USAGE
Engine Oil - Gasoline
Engines
Engine
Oil - Diesel Engines
Engine Coolant
Hydraulic Clutch System
Hydraulic Brake Systems
Parking Brake Cables
Power Steering System
Automatic Transmission
FLUIDLUBRICANT
API service SH or SG Energy
Conserving I1 oils
of the recommended
viscosity. The
“SH” designation may be
shown alone or
in combination with
others, such
as “SH/CD,” “SH, SG,
CD,”“SG/CD,” etc. To determine the
preferred viscosity for your vehicle’s
engine, see “Engine Oil” in the Index.
API service CF4SH. The
“CF4SH”
designation may be shown alone or in
combination
with others, such as
“CF-4/SG,” “CE/SH” or “CE/SG,” etc.
The designation may
also be listed in
reverse order, such
as “SH/CF-4.” To
determine the preferred viscosity for
your vehicle’s engine, see “Engine Oil”
in the Index.
Mixture
of water and a good quality
ethylene glycol base antifreeze
conforming
to “GM Specification
6038-M” (GM Part No. 1052753)’ or
approved recycled coolant conforming to
“GM Specification
603%”’ with a
complete coolant flush and refill.
Hydraulic Clutch Fluid (GM Part No.
I2345347 or equivalent).
Delco Supreme
11 @ brake fluid (GM
Part No.
1052535 or equivalent DOT-3
brake fluid).
Chassis Lubricant (GM Part No.
I2346003 or equivalent) or lubricant
meeting requirements of NLGI Grade
2,
Category LB or GC-LB.
GM Power Steering Fluid (GM Part
No. 1050017 or equivalent) conforming
to
“GM Specification 99850 10.”
DEXRON~ 111 or DEXRON~ IIE
Automatic Transmission Fluid.
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USAGE
Manual Transmission: a. 5-Speed with Low Gear
(FWO MT8)
FLUIDLUBRICANT
a. Castrol Syntorq or equivalent
(GM
Part No. 12345871 - 1 gal.)
(GM
Part NO. 12346074 - 1 st.).
b. $-Speed without Low Gear b. Synchromesh Transmission Fluid
(RPO MG5) (GM Part No. 12345349 or equivalent).
Differential:
a. Standard (Saginaw) Front
and Rear Axle
b. Locking
c. 3500 HD Models used
under extreme conditions
Transfer Case
Gas Line a. Axle Lubricant (GM
Part
No. 1052271) or
SAE-8OW-90
Gear Lubricant.
b. Axle Lubricant (GM Part No.
1052271) or SAE-8OW-90 Gear
Lubricant.
c. Axle Lubricant SAE-75W-140
Synthetic Gear Lubricant.
DEXRON~ 111 or DEXRON@ IIE
Automatic Transmission fluid.
Gas Line De-Icer (GM
Part No. 105 15 16
or equivalent).
Column Shift, Transfer Case, Chassis Lubricant (GM
Part No.
Shift Lever, and Propeller
12346003 or equivalent) or lubricant
Shaft meeting requirements
of NLGI Grade 2,
Category LB or GC-LB.
Clutch Fork Ball Stud (5-Speed with Low Gear)
Hood Latch Assembly a. Pivots and spring anchor
b. Release Pawl
Front Wheel Bearings Chassis Lubricant (GM
Part No.
12346003 or equivalent) or lubricant
meeting requirements of NLGI Grade 2,
Category LB or GC-LB.
a. Engine Oil (GM
Part No. 1050109 or
equivalent).
Chassis Lubricant (GM
Part
No. 12346003 or equivalent) or lubricant
meeting requirements of NLGI Grade 2,
Category LB or GC-LB.
Wheel Bearing Lubricant (GM
Part
No. 12346003 or equivalent) or lubricant
meeting requirements of NLGI Grade 2,
Category GC or GC-LB.
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USAGE FLUIDLUBRICANT
Propeller Shaft
SplineNniversal Joint Chassis Lubricant (GM Part
No. 12346003 or equivalent) or lubricant
meeting requirements
of NLGI Grade 2,
Category LB
or GC-LB.
Automatic Transmission Shift Engine Oil (GM Part
No. 1050109 or
Linkage, Floor Shift Linkage, equivalent).
Hood and Door Hinges, Body
Door Hinge Pins, Tailgate
Hinge and Linkage, Folding
Seat,
Fuel Door Hinge
Key Lock Cylinders
Chassis Lubrication
Windshield Washer Solvent and Anti-Freeze
Weatherstrip Squeaks
Weatherstrip Conditioning
Outer Tailgate Handle Pivot
Points Engine Oil
(GM Part No. 1050109
or
equivalent) or a synthetic light weight
engine oil (SAE 5W-30).
Chassis Lubricant (GM Part
No. 12346003 or equivalent) or lubricant
meeting requirements of NLGI Grade 2,
Category LB or GC-LB.
GM Optikleen washer solvent (GM Part
No. 105 15 15 or equivalent).
Spray-A-Squeek (GM Part
No.
1052277).
Dielectric Silicone Grease (GM Part No. 12345579 or equivalent).
Multi-Purpose Lubricant (GM Part
No. 12345 120
or equivalent).
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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 in the recovery bottle and add \
if
necessary.
Check the windshield washer fluid level and add if necessary.
See these items in the Index for information on how to check them.
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