GMC C-Series 2001 Owner's Manual page 297

200,000 Miles (320 000 km)
j
Remove, disassemble, clean and inspect the air brake
trailer supply valve (or every 2 years, or 7,200 hours,
whichever occurs first).
250,000 Miles (400 000 km)
j
Wheel bearings service
every 36 months, whichever occurs first). (23)(48)
j
--
Rear axle service Eaton, Rockwell, Spicer Axles
(or every 36 months, whichever occurs first). (37)(48)
j
Manual transmission 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 desiccant on
-
Bendix Westinghouse units.
-- -
Eaton Axle (oil filled) (or
Footnotes
[
= The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to the
completion of the vehicle's useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the maintenance
be recorded.
(1) = If your vehicle has an Allison automatic
transmission, your GM owner's manual is supplemented
by an Allison Transmission Operator's Manual. Always
refer to these manuals for related maintenance services.
(2) = Check the fluid level in the manual transmission.
(3) = An Emission Control Service.
(4) = A Noise Emission Control Device.
(5) = Applies only to vehicles sold in the United States.
(6) = Check fluid level in brake master cylinder, clutch
master cylinder (if equipped), power steering pump,
axle, transmission and hydraulic spring parking brake
pump (if equipped). A low fluid level in the brake
master cylinder can indicate worn brake linings and
should be checked accordingly.
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