GMC 2014 Sierra Denali 2500HD, Owner'S Manual

Page: 391 / 440

GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-14632286) - 2021 - CRC - 11/19/20
390 Service and Maintenance
Because of the way people use vehicles,
maintenance needs vary. There may need to
be more frequent checks and services. The
Additional Required Services - Normal are for
vehicles that:
. Carry passengers and cargo within
recommended limits on the Tire and
Loading Information label. See
Vehicle
Load Limits 0 224 .
. Are driven on reasonable road surfaces
within legal driving limits.
. Use the recommended fuel. See
Recommended Fuel 0 270 .
Refer to the information in the Maintenance
Schedule Additional Required Services -
Normal chart.
The Additional Required Services - Severe are
for vehicles that are:
.
Mainly driven in heavy city traffic in hot
weather
. Mainly driven in hilly or mountainous
terrain
. Frequently towing a trailer
.
Used for high speed or competitive
driving
. Used for taxi, police, or delivery service
Refer to the information in the Maintenance
Schedule Additional Required Services -
Severe chart.
{
Warning
Performing maintenance work can be
dangerous and can cause serious injury.
Perform maintenance work only if the
required information, proper tools, and
equipment are available. If they are not,
see your dealer to have a trained
technician do the work. See
Doing Your
Own Service Work 0 309 .
Maintenance Schedule
Owner Checks and Services
Check the engine oil level. See Engine Oil
0 312 .
Once a Month
. Check the tire inflation pressures,
including the spare. See
Tire Pressure
0 347 .
. Inspect the tires for wear. See Tire
Inspection 0 354 .
. Check the windshield washer fluid level.
See
Washer Fluid 0 322 .
Engine Oil Change
When the CHANGE ENGINE OIL SOON
message displays, have the engine oil and
filter changed within the next 1 000 km/
600 mi. If driven under the best conditions,
the engine oil life system may not indicate
the need for vehicle service for up to a year.
The engine oil and filter must be changed at
least once a year and the oil life system
must be reset. Your trained dealer technician
can perform this work. 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 when
the oil is changed. See
Engine Oil Life
System 0 314 .
Engine Air Filter Change
When the REPLACE AT NEXT OIL CHANGE
message displays, the engine air filter
should be replaced at the next engine oil
change. When the REPLACE ENGINE AIR
FILTER SOON message displays, the engine
air filter should be replaced at the earliest
convenience. Reset the engine air filter life
system after the engine air filter is replaced.
See
Engine Air Filter Life System 0 315 .