GMC 2010 Yukon XL Denali Owner's Manual page 510

When the Change Engine Oil Soon message displays,
certain services, checks, and inspections are required.
The services described for Maintenance should be
performed at every engine oil change. The services
described for Maintenance
performed when:
Maintenance was performed the last time the
engine oil was changed.
It has been 10 months or more since the Change
Engine Oil Soon message has displayed or since
the last service.
Maintenance
Change engine oil and filter. See Engine Oil on
page 6 15. An Emission Control Service.
Engine coolant level check. See Engine Coolant
on page 6 27.
Windshield washer fluid level check. See
Windshield Washer Fluid on page 6 37.
Tire inflation check. See Inflation - Tire Pressure
on page 6 64.
Tire wear inspection. See Tire Inspection and
Rotation on page 6 71.
7-4
should be
Rotate tires. See Tire Inspection and Rotation on
page 6 71.
Fluids visual leak check (or every 12 months,
whichever occurs first). A leak in any system
must be repaired and the fluid level checked.
Engine air cleaner filter inspection (vehicles
driven in dusty conditions only). See Engine
Air Cleaner/Filter on page 6 20.
Brake system inspection (or every 12 months,
whichever occurs first).
Maintenance
Perform all services described in Maintenance .
Steering and suspension inspection. Visual
inspection for damaged, loose, or missing parts or
signs of wear.
Lubricate the front suspension, steering linkage,
and parking brake cable guides. Control arm ball
joints are maintenance free.
Engine cooling system inspection. Visual
inspection of hoses, pipes, fittings, and clamps
and replacement, if needed.