GMC 2003 C4C042, Owner'S Manual

Page: 361 / 386

7-15
j Exhaust brake service (if equipped). Check for
excessive spindle free play and smooth operation.
Lubricate ball joint cap.
j Air compressor dry element pleated paper air strainer
service (or every 2 months or every 800 hours,
whichever occurs first).
j Inspect air compressor discharge port (or every
6 months or every 1,800 hours, whichever
occurs first).
j Manual transmission (ZF 6
-
speed only) fluid
replacement (or every 48 months, whichever
occurs first).
120,000 Miles (192 000 km)
j C600, C700 and C800 Gasoline Engines Only:
Replace engine drive belts.
150,000 Miles (240 000 km)
j Cooling system service (or every 60 months since
last service, whichever occurs first). (3)(35)
j Diesel Engine Only: Inspect engine drive belt;
replace as necessary.
200,000 Miles (320 000 km)
j Remove, disassemble, clean and inspect the air
brake trailer supply valve (or every 2 years, or
every 7,200 hours, whichever occurs first).
j Diesel Engine Only: Inspect engine drive belt;
replace as necessary.
j C400 and C500 Gasoline Engines Only: Inspect
drive belts; replace as necessary. (18)
250,000 Miles (400 000 km)
j Wheel bearings service
--
Eaton Axle (oil
-
filled) (or
every 36 months, whichever occurs first). (23)(46)
j Rear axle service
--
Eaton, Rockwell, Spicer Axles
(or every 36 months, whichever occurs first). (37)
j Manual transmission (except ZF 6
-
speed) fluid
replacement (or every 60 months, whichever
occurs first).
300,000 Miles (480 000 km)
j Remove, disassemble, clean and inspect the air brake
air dryer (or every 3 years, or 10,800 hours,
whichever occurs first). Replace dessicant on
Bendix
-
Westinghouse units.