Engine Air Cleaner/Filter - GMC Yukon XL Denali Owner's Manual

10-14 Vehicle Care
See Engine Compartment
Overview on page 10 6 for more
information.
2. Flip the handle up and then pull
out the dipstick and wipe it with
a clean rag or paper towel.
3. Install the dipstick by pushing it
back in all the way, wait
three seconds, and then pull it
back out again.
4. Check both sides of the dipstick
and read the lower level. Repeat
the check procedure to verify the
reading.
5. Safe operating level is within the
HOT cross hatch band on the
dipstick. If the fluid level is not
within the HOT band, and the
transmission temperature is
between 71°C and 93°C
(160°F and 200°F), add or drain
fluid as necessary to bring the
level into the HOT band. If the
fluid level is low, add only
enough fluid to bring the level
into the HOT band. It does not
take much fluid, generally less
than 0.5 L (1 pint). Do not
overfill.
6. If the fluid level is in the
acceptable range, push the
dipstick back in all the way, then
flip the handle down to lock the
dipstick in place.
Consistency of Readings
Always check the fluid level at least
twice using the procedures
described. Consistency (repeatable
readings) is important to maintaining
proper fluid level. If fluid is added, it
may take 15 minutes or longer
to obtain an accurate reading
because of residual fluid
draining down the dipstick tube.
If inconsistent readings persist,
check the transmission breather to
be sure it is clean and not clogged.
If readings are still inconsistent,
contact your dealer.

Engine Air Cleaner/Filter

See Engine Compartment Overview
on page 10 6 for the location of the
engine air cleaner/filter.
Inspect the air cleaner/filter at the
scheduled maintenance intervals
and replace it at the first oil change
after each 80 000 km (50,000 mi)
interval. See Maintenance Schedule
on page 11 3 for more information.
If driving on dusty/dirty conditions,
inspect the filter at each engine oil
change.
How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/filter,
remove the engine air cleaner/filter
from the vehicle by following
Steps 1 through 6. When the engine
air cleaner/filter is removed, lightly
shake it to release loose dust
and dirt.