GMC Chevrolet Tahoe 2011 Owner's Manual page 479

Once a Year
See Starter Switch Check on
page 10 31.
See Automatic Transmission
Shift Lock Control Function
Check on page 10 32.
See Ignition Transmission Lock
Check on page 10 32.
See Park Brake and P (Park)
Mechanism Check on
page 10 32.
Accelerator pedal check for
damage, high effort, or binding.
Replace if needed.
Underbody flushing service.
Hood/Decklid/Liftgate/Liftglass
Support Gas Strut Service:
Visually inspect gas strut,
if equipped, for signs of wear,
cracks, or other damage. Check
the hold open ability of the gas
strut. Contact your dealer if
service is required.
First Engine Oil Change After
Every 80 000 km/50,000 Miles
Engine air cleaner filter
replacement. See Engine Air
Cleaner/Filter on page 10 15.
Automatic transmission fluid
change (severe service) for
vehicles mainly driven in heavy
city traffic in hot weather, in hilly
or mountainous terrain, when
frequently towing a trailer,
or used for taxi, police,
or delivery service. See
Automatic Transmission Fluid on
page 10 12.
Four 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. Check vent
hose at transfer case for kinks
and proper installation. Check
to be sure vent hose is
unobstructed, clear, and free of
debris. During any maintenance,
Service and 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.
11-5