defrost grids on back and right side only?

[chadman]

My 2009 tahoe has the window defrost grid on the back lift glass but it also has one on the right side rear window but not the left rear window.

Is everyone's tahoe like this?

 

[zach2011]

Yup, dunno why this is like that but mine is the same way.

 

[LTZboy]

Its not a defrost grid. It is your radio antenna. All 07+'s have the antenna in the glass.