Retrieve My Number
Buick LaCrosse / Buick LaCrosse Owners Manual / OnStar / OnStar Services / Connections / Retrieve My Number
1. Push 
. System responds:
“OnStar ready.”.
2. Say “My Number.” System responds: “Your OnStar Hands-Free Calling number is.”
See also:
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To inspect the air cleaner/filter remove the filter
from the vehicle and lightly shake the filter to
release loose dust and dirt. If the filter remains
caked with dirt, a new filter is required.
...
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This vehicle has theft-deterrent features; however, they do not make it impossible to steal. ...