GMC 2005 T-Series Owner's Manual page 255

Shields and underhood insulation service. (3) (4) (18)
Rear axle air shift motor service. (9)
Air intake system service (or every 24 months,
whichever occurs first). (3) (4) (20)
Air compressor dry element pleated paper air strainer
service (or every 2 months or every 800 hours,
whichever occurs first).
96,000 Miles (152 000 km)
Vehicles Without Engine Oil Life System Only:
Change engine oil and filter (or every 12 months, or
every 600 hours of engine operation, whichever
occurs first). (2)
Vehicles With Engine Oil Life System Only: Check oil
life system (or every 600 hours of engine operation,
whichever occurs first). If engine oil and filter are
changed, reset system. See Engine Oil Life System
on page 5-18. (2) (8)
97,500 Miles (156 000 km)
Check fluid levels (or every 3 months, whichever
occurs first). (1) (5)
Chassis lubrication service (or every 6 months,
whichever occurs first). (10)
Wheels and tires service. (13)
100,000 Miles (160 000 km)
Inspect engine drive belt; replace as necessary.
Change power steering fluid (or every 36 months,
whichever occurs first). (11)
Replace power steering reservoir filter element (or
every 24 months, whichever occurs first).
Front axle service. (25)
Rear axle service – Eaton, Rockwell, Spicer Axles
(or every 12 months, whichever occurs first). (24)
Exhaust brake service (if equipped). Check for
excessive spindle free play and smooth operation.
Lubricate ball joint cap.
Inspect air compressor discharge port (or every
6 months or every 1,800 hours, whichever
occurs first).
Manual transmission (ZF 6–speed only) fluid
replacement (or every 48 months, whichever
occurs first).
Trailer brake hand control valve service (or every
12 months, or every 3,600 hours, whichever
occurs first). (29)
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