How to change cabin air filter in a 1999 cadillac sts?
HI, I think this article can help you,How to Change Cabin Air Filter .
Place the ignition switch in the Off position, remove the supplemental inflatable restraint fuse from the rear fuse panel. On 1997 models, the rear fuse panel is located in the luggage compartment. On the 1998-2003 models, the rear fuse panel is located under the rear seat. Remove the two retaining screws from the rear edge of the left sound
insulator. Push in on the snap tabs to release the insulator. Disconnect the left sound insulator electrical connectors, then remove the insulator. Twist the shift cable grommet and position away from the cabin air filter access door. It may be necessary to cut the tie strap and peel back the foam insulation to position the grommet away from the door. Remove the cabin air filter access cover from the A/C and heater module.
Remove the tape, then pull out the first cabin air filter element using the filter tab. Remove the tape, then pull out the second cabin air filter element using the filter tab. Remove the tape, then pull out the third cabin air filter element using the filter tab.
To ease installation, lubricate the new filter guides with silicon spray. Install the first clean air filter into the case. Using a long thin blade screw driver and filter tab, raise the filter until it is parallel with the A/C and heater module. Ensure the leading edge of the filter engages the filter case holding rib. Engage the new second cabin air filter in the tab of the first filter. Slide the second filter into the remaining channels of the first filter. Using the filter tab, raise the filter until it is parallel
with the A/C and heater module. Ensure the leading edge of the filter engages the filter case holding rib. Engage the third new cabin air filter in the tab of the second filter. Slide the third filter into the remaining channels of the second filter. Fold the tab of the second filter down. Fold the tab of the third filter up and over the second filter.
Install the A/C and heater module filter cover. Ensure the cover is properly seated. position the shift cable grommet. Position the left sound insulator to the instrument panel, then connect the electrical connectors. Install the left sound insulator fasteners. Torque the fasteners to 18 inch lbs. Be sure to install the fasteners in the proper locations, then install the SIR fuse. From a position off to the side of the air bag module, place the ignition switch in the "On" position. The air bag warning lamp should flash 7 times and then turn Off. Place the ignition switch in the "Off" position.
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