2003 CHEVROLET C/K oil

6-56 Automatic Ether Injection System
(If Equipped)
If you have a Caterpillar
diesel engine, you may have
this feature. The ether
cylinder is located in the
engine compartment on the
driver's side of the vehicle.To change an empty ether cylinder, follow these steps.
1. Loosen the screw head on the cylinder
-to-bracket
clamp.
2. Spread the clamp apart.
3. Clean any dirt from the neck of the cylinder and the
top of the valve before you take out the cylinder.
4. Check the inside of the valve for any foreign matter.
Clean the valve as necessary.
5. Cover the valve to protect it from dirt and take out
the cylinder.
6. Install a new gasket whenever you take out the
cylinder. Use only one gasket and spread a light film
of clean oil on it before installation.
7. Put in the new cylinder. Turn it clockwise until it just
starts to contact the gasket.
8. Tighten the cylinder another half turn (180 degrees).
Don't over
-tighten.
9. Retighten the cylinder clamp.

6-57 Front Wheel Bearings with Oil-Filled Hubs
If your vehicle has oil-filled
hubs, occasionally check to
see if they have enough oil.
You can tell if there is oil
there by using the circular
gage on the sight glass.
If there isn't, clean the rubber fill plug in the center of
the glass, and then remove it. Be careful not to allow
any dirt or water to get into the oil. Add enough of the
recommended oil to bring it up to the level mark that
you'll see on the glass.Refer to your Maintenance Schedule for the proper
oil to use.
When you fill the hub, check the glass again after
driving a short distance. It takes a while for the oil to
flow through the system, and you may find that you
have to add a little more to fill it to the proper level. Be
sure not to overfill the hub.
Air Conditioning System
Every now and then, have your dealership check your
air conditioning system to be sure it has not lost any
cooling ability. If you think the system is not working
properly, have your GM dealer check it out as soon
as possible.

6-63
Hub-Piloted Type,
8
-HoleHub
-Piloted Type,
10
-Hole
Then, follow the steps below for the wheels you have.
CAUTION:
Never use oil or grease on studs or the threads of
the wheel nuts. If you do, the nuts might come
loose. Your wheel could fall off, causing a crash.
Hub-Piloted Wheels, 8-Hole or 10-Hole
The studs and nuts used with these wheels have
right
-hand threads.
1. With intermittent pilot pads, position a pad at
12 o'clock to center the wheel and reduce run
-out.
2. Put the tire and rim assembly on the axle hub. Install
the outer rear tire and rim assembly so that its valve
stem is exactly opposite the valve stem on the inner
tire and rim assembly.
3. Put on the wheel nuts.
4. Finger
-tighten the nuts.
5. Oil the surfaces between the nuts and washers.
Do not oil the studs or the threads of the nut.
6. Tighten the nuts to 400 lb
-ft (542 N´m) if an 8-hole
stud or 480 lb
-ft (650 N´m) if a 10-hole stud. Use the
following diagrams.

6-69 Special Fabric Cleaning Problems
Stains caused by such things as catsup, coffee (black),
egg, fruit, fruit juice, milk, soft drinks, vomit, urine and
blood can be removed as follows:
1. Carefully scrape off excess stain, then sponge the
soiled area with cool water.
2. If a stain remains, follow the cleaner instructions
described earlier.
3. If an odor lingers after cleaning vomit or urine,
treat the area with a water/baking soda solution:
1 teaspoon (5 ml) of baking soda to 1 cup (250 ml)
of lukewarm water.
4. Let dry.
Stains caused by candy, ice cream, mayonnaise, chili
sauce and unknown stains can be removed as follows:
1. Carefully scrape off excess stain.
2. First, clean with cool water and allow to dry
completely.
3. If a stain remains, follow the cleaner instructions
described earlier.
Cleaning Vinyl
Use warm water and a clean cloth.

Rub with a clean, damp cloth to remove dirt.
You may have to do it more than once.

Things like tar, asphalt and shoe polish will stain if
you don't get them off quickly. Use a clean cloth and
a vinyl/leather cleaner. See your dealer for this
product.
Cleaning the Top of the Instrument Panel
Use only mild soap and water to clean the top surfaces
of the instrument panel. Sprays containing silicones or
waxes may cause annoying reflections in the windshield
and even make it difficult to see through the windshield
under certain conditions.
Cleaning Interior Plastic Components
Use only a mild soap and water solution on a soft
cloth or sponge. Commercial cleaners may affect the
surface finish.

6-72 Cleaning Exterior Lamps/Lenses
Use only lukewarm or cold water, a soft cloth and a
vehicle washing soap to clean exterior lamps and lenses.
Follow instructions under ªWashing Your Vehicle.º
Finish Care
Occasional waxing or mild polishing of your vehicle by
hand may be necessary to remove residue from the paint
finish. You can get GM
-approved cleaning products
from your dealer. See ªAppearance Care and Materialsº
in the Index.
Your vehicle may have ªbasecoat/clearcoatº paint finish.
The clearcoat gives more depth and gloss to the colored
basecoat. Always use waxes and polishes that are
non
-abrasive and made for a basecoat/clearcoat
paint finish.
NOTICE:
Machine compounding or aggressive polishing on
a basecoat/clearcoat paint finish may dull the
finish or leave swirl marks.
Foreign materials such as calcium chloride and other
salts, ice melting agents, road oil and tar, tree sap, bird
droppings, chemicals from industrial chimneys, etc., can
damage your vehicle's finish if they remain on painted
surfaces. Wash the vehicle as soon as possible. If
necessary, use non
-abrasive cleaners that are marked
safe for painted surfaces to remove foreign matter.
Exterior painted surfaces are subject to aging, weather
and chemical fallout that can take their toll over a period
of years. You can help to keep the paint finish looking
new by keeping your vehicle garaged or covered
whenever possible.
Protecting Exterior Bright Metal Parts
Bright metal parts should be cleaned regularly to keep
their luster. Washing with water is all that is usually
needed. However, you may use chrome polish on
chrome or stainless steel trim, if necessary.
Use special care with aluminum trim. To avoid
damaging protective trim, never use auto or chrome
polish, steam or caustic soap to clean aluminum. A
coating of wax, rubbed to high polish, is recommended
for all bright metal parts.

6-88 Engine Oil with Filter Capacity
Engine Quarts (Liters)
7.2L** 30.0 (28.4)*
8.1L** 6.5 (6.1)
7.8L** 23.8 (22.5 )
6.6L** 14.6 (13.8)
*Additional oil is required with auxiliary oil filter
systems. Make sure to add enough extra oil to fill the
auxiliary oil filter system. For vehicles equipped with
the LUBERFINER 750
-C, add 14 quarts (13.25 L).
** Check fill level on the oil indicator after initial fill to
make sure it is actually full. Oil level may vary
depending on vehicle option content.
Fuel Tank Capacity
C4/C5 Models Gallons (Liters). . . . . . . . . . . . . . . . .
Standard* 41 (155.2). . . . . . . . . . . . . . . . . . . . . . . .
Optional 40 (151.4). . . . . . . . . . . . . . . . . . . . . . . . . .
Optional 60 (227.1). . . . . . . . . . . . . . . . . . . . . . . . . .
Optional 80 (302.8). . . . . . . . . . . . . . . . . . . . . . . . . .
C6/C7/C8 Models Gallons (Liters). . . . . . . . . . . . . .
Standard 50 (189.2). . . . . . . . . . . . . . . . . . . . . . . . .
Optional 35 (132.4). . . . . . . . . . . . . . . . . . . . . . . . . .
Optional 50 (189.2). . . . . . . . . . . . . . . . . . . . . . . . . .
Optional
70 (264.8) . . . . . . . . . . . . . . . . . . . . . . . .
Optional75 (283.8) . . . . . . . . . . . . . . . . . . . . . . . .
Optional& 100 (378.5). . . . . . . . . . . . . . . . . . . . . . .
* One 25
-gallon (94.6 L) tank and one 16-gallon
(60.6 L) tank

Two 35
-gallon (132.4 L) tanks
One 25
-gallon (94.6 L) tank and One 50-gallon
(189.2 L) tank
&Two 50
-gallon (189.2 L) tanks

6-89 Transmission Capacity
For manual transmissions, the correct oil level is to the
bottom of the fluid fill plug opening. The oil capacity
will vary, due to the angle of the transmission, with the
vehicle. For automatic transmissions, see the Allison
Automatic Transmission Operator's Manual for oil
check and maintenance information.
Manual Transmission Pints (Liters). . . . . . . . . . . .
ZF S6
-650 12.7 (6.0). . . . . . . . . . . . . . . . . . . . . . . . .
RT6609 12.5 (5.9). . . . . . . . . . . . . . . . . . . . . . . . . . .
RT8709B 25.1 (11.8). . . . . . . . . . . . . . . . . . . . . . . . .
FS4205A, FS4205B, FS4205C 11.1 (5.3). . . . . . . . .
FS5205A, FS5205C 11.6 (5.5). . . . . . . . . . . . . . . . .
FS5406 18.4 (8.7). . . . . . . . . . . . . . . . . . . . . . . . . . .
FS6305A, FS6305B 18.4 (8.7). . . . . . . . . . . . . . . . .
FS6406 18.4 (8.7). . . . . . . . . . . . . . . . . . . . . . . . . . .
FS8406 18.5 (8.8). . . . . . . . . . . . . . . . . . . . . . . . . . .
RT8908LL 29.1 (13.8). . . . . . . . . . . . . . . . . . . . . . . . Automatic Transmission Pints (Liters). . . . . . . . . .
MD 3060 P 52.0 (24.6)*. . . . . . . . . . . . . . . . . . . . .
MD 3560 P 52.0 (24.6)*. . . . . . . . . . . . . . . . . . . . .
1000 Series 16.0 (8.9)*. . . . . . . . . . . . . . . . . . . . . .
2000 Series 35.0 (13.5)*. . . . . . . . . . . . . . . . . . . . .
2200 Series 35.0 (13.5)*. . . . . . . . . . . . . . . . . . . . .
2400 Series 35.0 (13.5)*. . . . . . . . . . . . . . . . . . . . .
*Add two pints (one liter) when changing spin-on or
remote filter.

6-90 Rear Axle Lubricant Capacity
Single Speed Axle Pints (Liters). . . . . . . . . . . . . . . .
80 10.0 (4.7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S135 26.0 (12.3). . . . . . . . . . . . . . . . . . . . . . . . . . . .
19060S 31.0 (14.7). . . . . . . . . . . . . . . . . . . . . . . . . .
21060D 31.0 (14.7). . . . . . . . . . . . . . . . . . . . . . . . . .
21060S 31.0 (14.7). . . . . . . . . . . . . . . . . . . . . . . . . .
S150 28.0 (13.0). . . . . . . . . . . . . . . . . . . . . . . . . . . .
23090S 40.0 (19.0). . . . . . . . . . . . . . . . . . . . . . . . . .
23105S 56.0 (26.5). . . . . . . . . . . . . . . . . . . . . . . . . .
26105S 54.0 (25.5). . . . . . . . . . . . . . . . . . . . . . . . . .
Tw o
-Speed Axle Pints (Liters). . . . . . . . . . . . . . . . .
19060T 38.0 (18.0). . . . . . . . . . . . . . . . . . . . . . . . . .
21060T 38.0 (18.0). . . . . . . . . . . . . . . . . . . . . . . . . .
23082T 40.0 (19.0). . . . . . . . . . . . . . . . . . . . . . . . . .
26080T 44.0 (20.8). . . . . . . . . . . . . . . . . . . . . . . . . .
Tandem Axles Pints (Liters). . . . . . . . . . . . . . . . . . .
DS344 (front) 32.0 (15.1). . . . . . . . . . . . . . . . . . . . .
RS344 (rear) 31.0 (14.7). . . . . . . . . . . . . . . . . . . . . .
DSH44 (front) 32.0 (15.1). . . . . . . . . . . . . . . . . . . . .
RSH44 (rear) 31.0 (14.7). . . . . . . . . . . . . . . . . . . . . .
DS404, DS404P (front) 32.0 (15.1). . . . . . . . . . . . . .
RS404 (rear) 31.0 (14.7). . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Refrigerant
Capacity
If you do your own service work, you'll need the proper
service manual. See ªDoing Your Own Service Workº in
the Index for additional information. It is recommended
that service work on your air conditioning system be
performed by a qualified technician.
Air Conditioning Refrigerant
R134a 2.1 lbs. (1.0 kg). . . . . . . . . . . . . . . . . . . . . . .
Use Refrigerant Oil, R143a Systems
Normal Maintenance
Replacement Parts
Allison Transmission External Filters
See the Allison Transmission Operator's Manual in your
vehicle for external filter part numbers and information.
Air Compressor Filter
Air Compressor Part Number
Bendix Tu
-Flo
550 (13.2 CFM)2467368