Chevrolet Kodiak 2008 Owner's Manual page 335

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 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)
Rear axle air shift motor service. (10)
Air intake system service (or every 24 months,
whichever occurs first). (3) (4) (23)
Evaporative Control System service, if equipped,
(or every 24 months, whichever occurs
first). (2) (24) †
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).
48,000 Miles (75 000 km)
Lubricate U-joints (or every 6 months, whichever
occurs first).
50,000 Miles (80 000 km)
Inspect air compressor discharge port (or every
6 months or every 1,800 hours, whichever
occurs first.)
52,500 Miles (84 000 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)
Wheels and tires service. (14)
®
DURAMAX Diesel Engine Only: Adjust valve lash
(or every 2,625 hours of engine operation, whichever
occurs first). (18)
Hydraulic brake service (or every 6 months,
whichever occurs first). (6) (36)
Parking brake service (or every 6 months, whichever
occurs first). (21)
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