Call Waiting
Call waiting must be supported on the cell phone and enabled by the wireless service carrier.
- Press 
to answer an
incoming call when another call
is active. The original call is
placed on hold.
- Press again to return to
the original call.
- To ignore the incoming call, no action is required.
- Press 
to disconnect the
current call and switch to the call
on hold.
See also:
Vehicle and Power Issues
OnStar services require a vehicle
electrical system, wireless service,
and GPS satellite technologies to be
available and operating for features
to function properly. These systems
may not o ...
If the Vehicle Is Stuck
Slowly and cautiously spin the wheels to free the vehicle when stuck in sand,
mud, ice, or snow. See “Rocking Your Vehicle to Get It Out” later in this section.
If the vehicle has a traction system ...
Checking Engine Oil
It is a good idea to check the
engine oil level at each fuel fill.
In order to get an accurate reading,
the vehicle must be on level
ground. The engine oil dipstick
handle is a yellow loop. S ...