GMC Sierra Denali 2006, Owner'S Manual, Page: 396 / 438

Additional Required Services
The following services should be performed at the first maintenance service ( I or II ) after the indicated miles (kilometers)
shown for each item.
Additional Required Services
Service and Miles (Kilometers)
25,000
(41 500)
50,000
(83 000)
75,000
(125 000)
100,000
(166 000)
125,000
(207 500)
150,000
(240 000)
Inspect fuel system for damage
or leaks.
• • • • • •
Inspect exhaust system for loose or
damaged components.
• • • • • •
Vehicles without a filter restriction
indicator: Replace engine air cleaner
filter. See Engine Air Cleaner/Filter on
page 5-17.
• • •
Change automatic transmission fluid
and filter (severe service).
See footnote (h).
• • •
Change automatic transmission fluid
and filter (normal service).
•
Change transfer case fluid.
See footnote (m).
• • •
Inspect evaporative control system.
An Emission Control Service.
See footnotes † and (g).
• • •
6-6