Cadillac 2008 XLR Owner's Manual page 343

3. Lift the front of the cover at an angle and remove.
This is necessary due to the four tabs located on
the rear of the cover.
4. Remove the engine air cleaner/filter element and
any loose debris that might be found in the air
cleaner base.
5. Inspect or replace the filter.
6. Repeat the procedure for the second air
cleaner/filter.
Reverse the above procedure to reinstall the engine air
cleaner filter housings.
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 flames 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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