Cadillac 2005 DeVille - Manual (Page 288)

3. Remove the engine air cleaner/filter element and
any loose debris that may be found in the air
cleaner base.
4. Inspect or replace the air filter element.
Follow these steps to reinstall the cover to the engine
air cleaner/filter housing:
1. Align the three tabs located on the back of the
cover with the three slots on the back of the
housing.
2. Push the cover slightly down and towards the
engine to engage the tabs in the slots and align the
two wing screws.
3. Engage and tighten the two wing screws on the top
of the engine air cleaner/filter housing cover.
{ CAUTION:
Operating the engine with the air cleaner/filter
off can cause you or others to be burned. The
air cleaner not only cleans the air; it helps to
stop flame if the engine backfires. If it is not
there and the engine backfires, you could
be burned. Do not drive with it off, and be
careful working on the engine with the air
cleaner/filter off.
Notice: If the air cleaner/filter is off, a backfire can
cause a damaging engine fire. And, dirt can
easily get into your engine, which will damage it.
Always have the air cleaner/filter in place when you
are driving.
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