Chevrolet Kodiak 2008 Owner's Manual page 331

Clean air brake application valve (or every 3 months,
or every 300 hours, whichever occurs first). Lubricate
linkage.
Air brake chamber service (or every 2 months,
whichever occurs first). (34)
Air compressor dry element pleated paper air strainer
service (or every 2 months, or every 800 hours,
whichever occurs first).
Thermostatically controlled engine cooling fan
service. (3) (19)
Shields and underhood insulation service. (3) (4) (20)
Gasoline Engine: Air compressor remote mounted air
filter dry element pleated paper air strainer service (or
every 6 months or every 1800 hours, whichever
occurs first).
22,500 Miles (36 000 km)
Gasoline Engine Only: Check engine oil life system.
If engine oil and filter are changed, reset system.
See "Engine Oil (Gasoline Engine)" in the
Index. (2) (8)
Check fluid levels (or every 3 months, whichever
occurs first). (1) (5)
Chassis lubrication service (or every 6 months,
whichever occurs first). (11)
Inspect door hinge pins and bushings and replace as
necessary.
Cooling system service. Clean the cooling system
filter cap with clean water, clean the core, pressure
test the cap and the system for proper pressure
capability, and inspect condition of cooling and heater
hoses and clamps. Replace hoses if cracked,
swollen, or damaged.
Wheels and tires service. (14)
Hydraulic brake service (or every 6 months,
whichever occurs first). (6) (36)
Parking brake service (or every 6 months, whichever
occurs first). (21)
Air brake service (or every 6 months, whichever
occurs first). (32)
Air brake automatic slack adjuster service (or every
500 hours, whichever occurs first). (33)
Check air brake relay valve operation and check for
leaks (or every month, or every 300 hours, whichever
occurs first).
Clean air brake application valve (or every 3 months,
or every 300 hours, whichever occurs first). Lubricate
linkage.
Air brake chamber service (or every 2 months,
whichever occurs first). (34)
Air brake system valve service (or every 3 months,
or every 900 hours, whichever occurs first). (37)
Air intake system service (or every 24 months,
whichever occurs first). (3) (4) (23)
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