On the home stretch of my C7 maintenance and detail before she gets put to sleep for a long winter slumber. Here are some pic's of the engine air filter and cabin air filter removal, inspection and cleaning. A very simple task anyone can accomplish quickly. The procedure is in the owners manual as well. There are four 7mm bolts holding on the heat duct which needs to be removed first. I find it easier to remove the complete air intake plenum. The two large clamps are loosened, 8mm bolts. There are 2 plastic PCV vent tubes whiche are removed by pushing down on the gray buttons and pulling up on the tubing gently at the same time. There is one electical connector which needs to be removed by gently pulling up on the red clip to release the lock, then pushing in on the release clip and pulling the connector off. At this point the complete air intake plenum ass'y can be removed, inspected and cleaned. Finally, the air filter hosing is removed by loosening the 2 torx T20 bolts, tilted downwards and then removed by pulling out of the two lower slots. At this point the air filter can be removed for cleaning or replacement. I should mention that a small amount of mechanical aptitude is required for this task, but is overall very easy to accomplish.
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