GMC 2003 C4C042, Owner'S Manual

Page: 360 / 386

7-14
90,000 Miles (144 000 km) (Continued)
j Evaporative Control System service (if equipped) (or
every 24 months, whichever occurs first). (3)(26)
[
j Air brake service (or every 6 months, whichever
occurs first). (39)
j Air brake automatic slack adjuster service (or every
500 hours, whichever occurs first). (40)
j Check air brake relay valve operation and check
for leaks (or every month, or every 300 hours,
whichever occurs first).
j Clean air brake application valve (or every 3 months,
or every 300 hours, whichever occurs first); lubricate
linkage.
j Air brake chamber service (or every 2 months,
whichever occurs first). (41)
j Trailer brake hand control valve service (or every
3 months, or every 900 hours, whichever
occurs first). (42)
j L18/LB7 Engines Only: Clutch pedal free
travel service. (10)
97,500 Miles (156 000 km)
j Gasoline Engine Only: Check Oil Life System.
If engine oil and filter are changed, reset system.
See “Engine Oil” in the Index. (3)(9)
j Check fluid levels (or every 3 months, whichever
occurs first). (1)(6)
j Chassis lubrication service (or every 6 months,
whichever occurs first). (12)
j Wheels and tires service. (15)
j Parking brake service (or every 6 months, whichever
occurs first). (8)
j L18/LB7 Engines Only: Clutch pedal free
travel service. (10)
100,000 Miles (160 000 km)
j DURAMAXt Diesel Only: Change engine
oil and filter (or every 12 months, whichever
occurs first). (2)(3)
j Diesel Only: Inspect engine drive belt; replace
as necessary.
j Gasoline Engine Only (Vehicles with GVW of
16,000 lbs. or less): Spark plug service. (3)(28)
j Change power steering fluid (or every 36 months,
whichever occurs first). (13)
j Replace power steering reservoir filter element
(or every 24 months, whichever occurs first).
j Front axle service. (38)
j Rear axle service
--
Eaton, Rockwell, Spicer Axles
(or every 12 months, whichever occurs first). (37)