GMC 2006 DURAMAX Manual page 52

1. Loosen the screws on the cover of the housing and
lift up the cover.
2. Remove the air cleaner/filter from the housing. Care
should be taken to dislodge as little dirt as possible.
3. Clean the filter sealing surface and the housing.
4. Install the new engine air cleaner/filter.
5. Reinstall the cover and tighten the screws.
6. Reset the air cleaner/filter restriction indicator,
if equipped, by pressing the top button on the
indicator.
5-28
See Scheduled Maintenance on page 6-4 to determine
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 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.