Automatic Transmission Fluid - GMC 1999 Savana Van Owner's Manual

5. Install a new filter element with the folds in the
down position.
Reverse Steps 1 through 4 to replace the air cleaner.
See "Normal Replacement Parts" for the proper filter
to use.
Refer to the Maintenance Schedule to determine when to
replace the air filter and crankcase ventilation filter.
See "Scheduled Maintenance Services" in the Index.
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 stops flame if
the engine backfires. If it isn't there, and the
engine backfires, you could be burned. Don't
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're driving.

Automatic Transmission Fluid

If your vehicle has a diesel engine, see "Automatic
Transmission Fluid" in the Diesel Supplement.
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's GVWR is over 8,600 or
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.
yellowblue
_
C) or higher.
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