Cadillac 2005 CTS - Manual (Page 159)

Passenger Compartment Air Filter
The passenger compartment air filter traps most of the
pollen from the air entering your vehicle. Like your
vehicle’s engine air cleaner/filter, it needs to be changed
periodically. For how often to change the passenger
compartment air filter, see
Scheduled Maintenance
on page 6-4.
Using your climate control system without the passenger
air filter installed may allow water or other debris to
enter the system. This could cause a water leak
or noises. Make sure to install a new air filter after
removing the old one.
The passenger compartment air filter is located
underneath the hood below the windshield wiper arm
on the passenger’s side of the vehicle. See
Engine
Compartment Overview on page 5-12 for more
information on location.
Use the procedure listed below to replace the passenger
compartment air filter:
1. Turn the ignition to ON with the engine off.
2. Turn on the windshield wipers and turn them off
again when the wipers are straight up and down
on the windshield.
This will allow you access to the leaf screen
under which is located the passenger compartment
air filter.
3. Open the hood to access the engine compartment.
See Hood Release on page 5-11 for more
information.
4. Remove the four screws that hold the leaf screen in
place and lift off the screen by lifting and sliding
toward the center of the vehicle.
5. Pull out on the two tabs located on each end of the
filter cover.
6. Lift the filter cover off by pulling it straight upward.
7. Remove the old filter and insert a new one.
Make sure the arrow on the filter is pointing toward
the passenger compartment.
See Normal Maintenance Replacement Parts on
page 6-15 for the correct part number for the filter.
8. Reverse Steps 1 through 6 to reinstall the cover.
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