2003 CTS. new owner, few problems.
 

I have CTS with 78000 miles (V6). It was a great deal, but the car is far from perfect. The things that mainly concern me are:

1. Fuel gauge not working at all. I have read that it is most likely the fuel sending unit. And that there are 2 of them in each side of the tank. Is this true?
* also, I don't really know how to use the functions on the dash at all. But I managed to scroll past the mpg, ect. section and it all was blank. If that helps diagnose it.

2. How do I use the center console! That thing is confusing.
* I would like to know my oil and water temp, pressure, level, ect. The only thing I seen messing with it is the battery voltage. None of this comes up on the gauge cluster right?

3. There are a few things showing on the gauge cluster. How do I clear them or find the codes to fix those problems?

4. Exhaust manifold leak. I havnt had a chance to really take a good look, but is it involved to replace the gasket? Anything major have to be removed to reach the bolts?

Wow same exact problems as my 03. Only mine has many more.