GMC T-Series 1999 Owner's Manual page 283

Scheduled Maintenance (Except DURAMAX
99,000 Miles (165 000 km)
j
Engine oil and filter service. (3)(9)
j
Check fluid levels (or every 3 months, whichever
occurs first). (1)(2)(6)
j
Clean air conditioner filter (or every month,
whichever occurs first). See "Air Conditioner Filter"
in the Index.
100,000 Miles (166 000 km)
j
Change power steering fluid (or every 36 months,
whichever occurs first). (13)
j
Front axle service (or every 36 months, whichever
occurs first). (38)
j
--
Rear axle service Eaton, Rockwell, Spicer Axles
(or every 12 months, whichever occurs first). (1)(37)
j
Exhaust brake service (if equipped). Check for
excessive spindle free play and smooth operation.
Lubricate ball joint cap.
j
Accelerator control cable replacement (diesel) (or
every 36 months, whichever occurs first). (19)
j
Air brake service (or every 12 months, or
3,600 hours, whichever occurs first). (44)
t
DIESEL)
150,000 Miles (240 000 km)
j
Cooling system service (or every 60 months since
last service, whichever occurs first). (3)(35)
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). (2)(23)
j
--
Rear axle service Eaton, Rockwell, Spicer Axles
(or every 36 months, whichever occurs first). (2)(37)
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 dessicant on
-
Bendix Westinghouse units.
yellowblue
-- -
Eaton Axle (oil filled) (or
7-21