GMC T-Series 2007, Owner'S Manual, Page: 295 / 356

Scheduled Maintenance
Supplements
If your vehicle has an Allison Transmission
®
, your
owner manual is supplemented by an Allison
Transmission
®
Operator’s Manual. Always refer to
these manuals for related maintenance services.
Scheduled Maintenance
The services shown in this schedule up to
100,000 miles (166 000 km) should be repeated
after 100,000 miles (166 000 km) at the same
intervals for the life of this vehicle. The services
shown after 100,000 miles (166 000 km) should
be repeated at the same miles (km) after
those intervals for the life of this vehicle.
The “Footnotes” at the end of this Maintenance
Schedule further explain maintenance services.
See Service Publications Ordering Information on
page 338.
100 Miles (160 km)
❑
Wheel stud nut service. (30)
1,000 Miles (1 600 km)
❑
Wheel stud nut service. (30)
❑
Rear axle air shift motor service. (9)
7,500 Miles (12 000 km)
❑
Check fluid levels (or every 3 months,
whichever occurs first). (1) (5)
❑
Chassis lubrication service (or every 6 months,
whichever occurs first). (10)
❑
Spring-to-axle U-bolts and shackle bolts
service. (15)
❑
Wheels and tires service. (13)
❑
Hydraulic brake service (or every 6 months,
whichever occurs first). (6) (30)
❑
Parking brake service (or every 6 months,
whichever occurs first). (7)
❑
Air brake service (or every 6 months, whichever
occurs first). (26)
❑
Air brake automatic slack adjuster service
(or every 500 hours, whichever occurs first). (27)
❑
Check air brake relay valve operation and check
for leaks (or every month, or every 300 hours,
whichever occurs first).
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