Dashboard warning light meaning on 2006 GMC Yukon Denali

A dashboard warning light that resembles a truck & padlock just came on. We are not certain what this means since our truck did not come with the owner's manual. Anyone have any insight?

by in Algonac, MI on February 22, 2011
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1 answer
ANSWER by , February 23, 2011
The light indicates reflects the anti theft system related to having the proper key.