GMC TopKick 2007 Owner's Manual page 374

Isuzu 6H 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 /Isuzu Diesel)" in the Index. (2) (7)
Gasoline Engine Only (Vehicles with GVW
greater than 16,000 lbs): Spark plug
service. (2) (25)
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).
374
Chassis lubrication service (or every 6 months,
whichever occurs first). (11)
Replace fuel filter(s) (or every 12 months,
whichever occurs first). (2)
Inspect door hinge pins and bushings and
replace as necessary.
Steering system service. (12)
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)
Wheel bearing (grease type) service (and
whenever hubs are removed). (22) (36)
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)