GMC 2004 Yokon Denali Owner's Manual page 435

Change engine oil and filter. Reset oil life system. See Engine Oil on
page 5-14. An Emission Control Service.
Lubricate chassis components. See footnote #.
Visually check for any leaks or damage. See footnote (j).
Inspect engine air cleaner filter or change indicator (if equipped). If necessary,
replace filter. See Engine Air Cleaner/Filter on page 5-19. An Emission Control
Service. See footnote †.
Rotate tires and check inflation pressures and wear. See Tires on page 5-56.
Inspect brake system. See footnote (a).
Check engine coolant and windshield washer fluid levels and add fluid as
needed.
Perform any needed additional services. See "Additional Required Services" in
this section.
Inspect suspension and steering components. See footnote (b).
Inspect engine cooling system. See footnote (c).
Inspect wiper blades. See footnote (d).
Inspect restraint system components. See footnote (e).
Lubricate body components. See footnote (f).
Check transmission fluid level and add fluid as needed.
Scheduled Maintenance
Service Maintenance I Maintenance II
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6-5