GMC Terrain 2020 Owner's Manual page 292

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-MidEast-
13556232) - 2020 - CRC - 5/13/19
292 Service and Maintenance
Replace passenger
compartment air filter,
if equipped. Or every two years,
whichever comes first. More
frequent replacement may be
needed if you drive in areas with
heavy traffic, areas with poor air
quality, or areas with high dust
levels. Replacement may also
be needed if you notice reduced
airflow, windows fogging up,
or odors. Your local GM Service
location can help you determine
when it is the right time to
replace your filter.
Replace windshield wiper
blades. Or every 12 months,
whichever comes first. See
Wiper Blade Replacement
0 236.
Every 80 000 km/50,000 mi
Inspect evaporative control
system. Visually check all fuel
and vapor lines and hoses for
proper attachment, connection,
routing, and condition.
Replace spark plugs. Inspect
spark plug wires and/or boots.
Every 120 000 km/75,000 mi
Replace hood and/or body lift
support gas struts. Or every
10 years, whichever comes first.
Every 240 000 km/150,000 mi
Change rear axle fluid,
if equipped with AWD. Do not
directly power wash the transfer
case and/or front/rear axle
output seals. High pressure
water can overcome the seals
and contaminate the transfer
case fluid. Contaminated fluid
will decrease the life of the
transfer case and/or axles and
should be replaced.
Drain and fill engine cooling
system. Or every five years,
whichever comes first. See
Cooling System 0 226.
Visually inspect accessory drive
belts. Or every 10 years,
whichever comes first. Inspect
for fraying, excessive cracking,
or damage; replace, if needed.
Severe Conditions Requiring
More Frequent Maintenance*
Public service, military,
or commercial use vehicles to
include the following:
Ambulances, police cars and
emergency rescue vehicles.
Civilian vehicles such as light
duty pick-up trucks, SUVs and
passenger cars that are used
in military applications.
Recovery vehicles such as
tow trucks and flatbed single
vehicle carriers or any vehicle
that is consistently used in
towing trailers or other loads.
High use commercial vehicles
such as courier delivery
vehicles, private security patrol
vehicles or any vehicles that
operate on a 24 hour basis.
Any vehicle consistently
operated in a high sand or
dust environment such as
those used on oil pipelines
and similar applications.