GMC Express 2011 Owner's Manual page 377

Scheduled
Maintenance
When the Change Engine Oil
Soon Message Displays
Change engine oil and filter.
See Engine Oil on page 10 7.
An Emission Control Service.
When the CHANGE ENGINE OIL
SOON message displays, service is
required for the vehicle as soon as
possible, within the next 1 000 km/
600 mi. If driving under the best
conditions, the engine oil life system
might not indicate the need for
vehicle service for more than a year.
The engine oil and filter must be
changed at least once a year and
the oil life system must be reset.
Your dealer has trained service
technicians who will perform this
work and reset the system. If the
engine oil life system is reset
accidentally, service the vehicle
within 5 000 km/3,000 mi since the
last service. Reset the oil life
system whenever the oil is changed.
See Engine Oil Life System on
page 10 10.
Every Engine Oil Change
Change engine oil and filter.
Reset oil life system. See
Engine Oil on page 10 7 and
Engine Oil Life System on
page 10 10. An Emission
Control Service.
Engine coolant level check.
See Engine Coolant on
page 10 20.
Engine cooling system
inspection. Visual inspection of
hoses, pipes, fittings, and
clamps and replacement,
if needed.
Service and Maintenance
Windshield washer fluid level
check. See Washer Fluid on
page 10 27.
Windshield wiper blade
inspection for wear, cracking,
or contamination and windshield
and wiper blade cleaning,
if contaminated. See Exterior
Care on page 10 96. Worn or
damaged wiper blade
replacement. See Wiper Blade
Replacement on page 10 36.
Tire inflation pressures check.
See Tire Pressure on
page 10 60.
Tire wear inspection. See Tire
Inspection on page 10 66.
Rotate tires if necessary.
See Tire Rotation on
page 10 66.
Fluids visual leak check
(or every 12 months, whichever
occurs first). A leak in any
system must be repaired and
the fluid level checked.
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