dash board light is on on 2007 Cadillac DTS

I do not have a manual, and the light is on on the dash board by the gas gauge the symbol in the light is like a u shape with a line going down the middle and it is yellow flashing on and off. I don't know what the light is fore, maybe tire pressure? Where can I get a manual? Thank you. James Johnson

Asked by for the 2007 Cadillac DTS
I believe your correct, look at this pic, this is a tire pressure warning light: