I have a 2005 chevy suburban that is having a/c issues. It has a front and rear a/c. The front doesn't blow at all and the back will blow cold air sometimes, but mostly blows hot air. The back has 3 speeds but will only blow on speed 3. The front will not blow on any speed. The front has 5 speeds and for the last couple of months speed 5 has not worked.

Any help will be greatly appreciated

Thansk