Chevrolet Kodiak 2006 Owner's Manual page 346

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)
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) †
Air compressor dry element pleated paper air strainer
service (or every 2 months or every 800 hours,
whichever occurs first).
6-12
48,000 Miles (75 000 km)
®
7.8L DURAMAX Diesel Without Engine Oil Life
System Only: Change engine oil and filter
(or every 12 months, or every 600 hours of engine
operation, whichever occurs first). (2)
®
7.8L DURAMAX Diesel With Engine Oil Life System
Only: Check oil life system (or every 12 months, or
every 600 hours of engine operation, whichever
occurs first). If engine oil and filter are changed, reset
system. See "Engine Oil (DURAMAX
the Index. (2) (7)
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)
®
Diesel)" in