Chevrolet 2005 Equinox Owner's Manual page 250

See Scheduled Maintenance on page 6-4 for information
on when to replace the engine air cleaner/filter.
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.
5-18
To replace the engine air cleaner/filter, do the following:
1. Turn off the engine.
2. Disconnect the air flow sensor electrical connector.