1993 CHEVROLET SUBURBAN differential

Service & Appearance Care
Front Axle
When to Check and Change Lubricant:
Refer to the Maintenance Schedule to determine how often to check the
lubricant and when to change it. See “Scheduled Maintenance Services” in
the Index.
How to Check Lubricant:
PO231
If the level is below the bottom of the filler plug hole, you’ll need to add
some lubricant.
If the differential is at operating temperature (warm), add
enough lubricant to raise the level
to the bottom of the filler plug hole.
If the differential is cold, add enough lubricant to raise the level to 1/2 inch
(12 mm) below the filler plug hole.
What to Use:
Refer to the Maintenance Schedule to determine what kind of lubricant to
use. See “Recommended Fluids and Lubricants” in the Index.\

Rear Axle
When to Check and Change Lubricant:
Refer to the Maintenance Schedule to determine how often to check the
lubricant and when to change it. See “Recommended Fluids and Lubricants”
in the Index.
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23. EXHAUST PRESSURE EGULATOR VALVE INSPECTION* -Check that
the valve works properly. Correct any binding. Inspect hoses fo\
r cracks,
chafing or decay. Replace parts
as needed.
24. 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 (t) or 7,500 miles (12 500 kilometers) for
Schedule
II (.) 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 for 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
(160, 1600 and 10 000 km).
For
3500 H.D. Models, block the tires opposite those being removed to
keep the vehicle from rolling.
25.
DRIVE AXLE SERVICE -Check readfront axle fluid level and add as
needed. Check constant velocity joints and axle seals for leaki\
ng.
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$
every oil change. In dusty areas,
or trailer towing applications, drain
fluid every 15,000 miles
(24 135 kilometers) and refi1l.t
Standard differential -Check fluid level and add as needed at
More frequent lubrication may be required on heavy-duty or off-road
use.
26. BRAKE SYSTEM INSPECTION -When the engine oil is changed,
inspect the lines
and hoses for proper hookup, binding, leaks, cracks,
chafing, etc. Check the parking brake adjustment, and the fluid level in
the master cylinder.
A low fluid level can indicate worn disc brake pads
which may need to be serviced$
*An Emission Control Service
tA 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.
Engine Oil
IEnginelant
II
Hydraulic Clutch System
Hydraulic Brake Systems
Parking Brake Cables
(
(
Power Steering System (
t
Manual Steering Gear
Automatic Transmission
r
Manual Transmission:
a. 5-Speed with Low Gear
1 b. 5-Speed without Low Gear
I
FLUID/LUBRICANT
;M Goodwrench Motor Oil or equivalent for API Service SG
)r SGiCE of the recommended viscosity.
ilixture
of water and a good quality ethylene glycol base
intifreeze conforming to
GM-6038-M (GM Part No. 1052103).
iydraulic Clutch Fluid
(GM Part No. 12345347 or equivalent).
lelco Supreme 11
8 brake fluid (GM Part No. 1052535 or
2hassis grease meeting requirements
of NLGl Grade 2,
2atagory LB or GC-LB (GM Part
No. 1052497).
3iM Power Steering Fluid (GM Part No. 1050017) or
2quivalent conforming to
GM spec 9985010.
3M Lubricant (GM Part No. 1052182) or equivalent.
IEXRON@ IIE Automatic Transmission Fluid (GM Part No.
1051 855). lOT-
3).
a. CastrolCo
Syntorq or equivalent (GM Part No.
b. Standard Transmission Fluid (GM Part No. 12345349). 12346074).
Differential:
a.
Standard (Saginaw) Front
and Rear Axle
I
b. Locking
Transfer Case a. SAE-80W-90 gear lubricant (GM Part
No. 1052271).
b.
SAE-80W-90 gear lubricant (GM Part No. 1052271).
DexronB
IIE Automatic Transmission Fluid (GM Part No.
12345881 ).
IGas- IL
Weather Strips I:
?as Line De-leer (GM Part No. 1051516).
Spray-ASqueek (GM Part No. 1052277).
Column Shift, Transfer Case Shift Lever, and Propeller Shaft.
Clutch Fork Ball Stud
(
(
>hassis grease meeting requirements of NLGl Grade 2,
;ategory LB or GC-LB
(GM Part No. 1052497).
zhassis grease meeting requirements
of NLGl Grade 2,
;ateaorv LB or GC-LB (GM Part No. 1052497).
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