Using the “Re-dial” Command
1. Press and hold 
for two seconds.
2. After the tone, say “Re-dial.” Once connected, the person called will be heard through the audio speakers.
See also:
Fuels in Foreign Countries
Never use leaded gasoline or any other fuel not recommended in the previous text
on fuel. Costly repairs caused by use of improper fuel would not be covered by the
vehicle warranty.
To check the ...
2008 GMC Yukon Review
The 2007 GMC Yukon — along with the Cadillac Escalade and Chevrolet Tahoe —
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Warranty
OnStar equipment may be warranted as part of the new-vehicle limited warranty.
The manufacturer of the vehicle furnishes detailed warranty information. ...