GMC Acadia 2011 Owner's Manual page 425

All wheel drive only: Transfer
case fluid change (severe
service) for vehicles mainly
driven when frequently towing a
trailer, or used for taxi, police,
or delivery service. During any
maintenance, if a power washer
is used to clean mud and dirt
from the underbody, care should
be taken to not directly spray
the transfer case 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 should be replaced.
Evaporative control system
inspection. Check all fuel and
vapor lines and hoses for proper
hook up, routing, and condition.
Check that the purge valve,
if the vehicle has one, works
properly. Replace as needed.
An Emission Control Service.
The U.S. Environmental
Protection Agency or the
California Air Resources
Board has determined that
the failure to perform this
maintenance item will not
nullify the emission warranty or
limit recall liability prior to the
completion of the vehicle's
useful life. We, however,
urge that all recommended
maintenance services be
performed at the indicated
intervals and the maintenance
be recorded.
First Engine Oil Change After
Every 160 000 km/100,000 Miles
Automatic transmission fluid
change (normal service).
See Automatic Transmission
Fluid on page 10 12.
Spark plug replacement and
spark plug wires inspection.
An Emission Control Service.
All wheel drive only: Transfer
case fluid change (normal
service). During any
Service and Maintenance
maintenance, if a power
washer is used to clean mud
and dirt from the underbody,
care should be taken to not
directly spray the transfer case
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 should be
replaced.
First Engine Oil Change After
Every 240 000 km/150,000 Miles
Engine cooling system drain,
flush, and refill (or every five
years, whichever occurs first).
See Cooling System on
page 10 14. An Emission
Control Service.
Engine drive belts inspection
for fraying, excessive cracks,
or obvious damage (or every
10 years, whichever occurs
first). Replace, if needed.
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