Automatic Transmission Fluid; (4-Speed Transmission) - GMC 2009 Yukon XL Owner's Manual

5. Inspect or replace the engine air cleaner/filter.
6. Reinstall the cover and tighten the screws.
CAUTION:
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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.

Automatic Transmission Fluid

(4-Speed Transmission)

When to Check and Change Automatic
Transmission Fluid
A good time to check the automatic transmission fluid
level is when the engine oil is changed.
Change the fluid and filter at the intervals listed in
Additional Required Services on page 6-6 and be sure
to use the transmission fluid listed in Recommended
Fluids and Lubricants on page 6-13.
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