Radio Question

[crackerJack1]

I have a 06 colorado and installed a newer radio. the face works properly but speaker have no sound what should i check?

 

[zora]

I have a 06 colorado and installed a newer radio. the face works properly but speaker have no sound what should i check?

With so little information really difficult to answer. Obviously whatever you did there is no output to the speaker wires. Did the new radio come with instructions?