See also:

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

Turn and Lane-Change Signals
An arrow on the instrument panel cluster flashes in the direction of the turn or lane change. Move the lever all the way up or down to signal a turn. Raise or lower the lever for less than one sec ...

When to Inspect 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 ...