GMC 2007 Envoy Denali Owner's Manual page 509

Scheduled Maintenance
Service Maintenance I Maintenance II
Change engine oil and filter. See Engine Oil on page 394. Reset oil life system.
See Engine Oil Life System on page 398. An Emission Control Service.
Visually check for any leaks or damage. See footnote (j).
Inspect engine air cleaner filter. If necessary, replace filter. See Engine Air
Cleaner/Filter on page 400. See footnote (k).
Rotate tires and check inflation pressures and wear. See Tire Inspection and
Rotation on page 453 and "Tire Wear Inspection" in At Least Once a Month
on page 514.
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. See footnote (g).
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