GMC TopKick 2007 Owner's Manual page 377

®
6.6L DURAMAX Diesel With Engine Oil Life
System Only: Check oil life system. If engine
oil and filter are changed, reset system.
See "Engine Oil (DURAMAX
in the Index. (2) (9)
Chassis lubrication service (or every 6 months,
whichever occurs first). (11)
Check fluid levels (or every 3 months,
whichever occurs first). (1) (5)
Gasoline Engine: Inspect engine air cleaner
filter. If necessary, replace the filter. If vehicle
is driven in dusty/dirty conditions, inspect
filter at every engine oil change. See Engine
Air Cleaner/Filter on page 277 for more
information.
Diesel Engine: Inspect engine air cleaner filter
change indicator. If necessary, replace the
filter. If vehicle is driven in dusty/dirty conditions,
inspect filter change indicator at every engine
oil change. See Engine Air Cleaner/Filter
on page 277 for more information.
®
DURAMAX /Isuzu Diesel Only: Replace fuel
filter (or every 750 hours of engine operation,
whichever occurs first).
Steering system service. (12)
®
/Isuzu Diesel)"
Front and rear suspension service. (13)
Spring-to-axle U-bolts and shackle bolts
service. (15)
Exhaust system service (or every 6 months,
whichever occurs first). (2) (3) (16)
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)
377