Passenger Compartment Air Filter; Automatic Transmission Fluid; When To Check And Change - GMC 2001 Denali Owner's Manual

Passenger Compartment Air Filter

The filter is located under the instrument panel below
the glove compartment.
To replace the passenger compartment air filter do
the following:
1. Remove the bolts on the access panel and set the
panel aside. Because this operation can be a little
difficult, you may choose to have it done at your
dealer's service department.
3. Remove the air filter by pulling down on the
element. Remove the second portion of the air filter
by sliding it towards the rear of the vehicle and then
pulling downward.
2. Reach under the
instrument panel
towards the front of
the vehicle and pull
down on the filter
retaining bracket.
4. Install the new filter by reversing the steps listed
previously. Be sure to follow any instructions that
may be included in the replacement filter package.
Refer to the Maintenance Schedule to determine when
to replace the passenger compartment air filter. See
"Scheduled Maintenance" in the Index.

Automatic Transmission Fluid

When to Check and Change

A good time to check your automatic transmission fluid
level is when the engine oil is changed.
Change both the fluid and filter every 50,000 miles
(83 000 km) if the vehicle is mainly driven under one
or more of these conditions:
D
In heavy city traffic where the outside temperature
_
regularly reaches 90 F (32
D
In hilly or mountainous terrain.
D
When doing frequent trailer towing.
D
Uses such as found in taxi, police or delivery service.
If you do not use your vehicle under any of
these conditions, change the fluid and filter
every 100,000 miles (166 000 km).
See "Scheduled Maintenance Services" in the Index.
_
C) or higher.
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