GMC 2004 Envoy Owner's Manual page 423

Scheduled Maintenance
Service Maintenance I Maintenance II
Change engine oil and filter. Reset oil life system. See Engine Oil
on page 5-16. 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 5-21. An Emission Control Service. See footnote †.
Rotate tires and check inflation pressures and wear. See Tires on page 5-55.
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.
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