Unknown Buttons

hello every one
can any one told me what these buttons for ,my car is yukon 2001
thank you

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Universal Home Remote System
The Universal Home Remote System, a combined
universal transmitter and receiver, provides a
way to replace up to three hand-held transmitters
used to activate devices such as gate operators,
garage door openers, entry door locks, security
systems, and home lighting.

Page 169 on the 07 manual will tell you how to program that year...


https://www.mygmlink.com/pdf/go2content/manual/US/en/gmc/2007yukon.pdf

thank you ken L.1234