I just bought a new 5.0 Wat do I have to do to fix mickey Thomson atz 33x13.50 I kno a 2.5 level kit will fit the height, but I plan on using my factory wheels, so would I need wheel spacers

 

You would be much, much better off to go with a 33x12.50-20 (305/55-20).

 

would it be because they would be too wide, and is the factory wheel not wide enough to work with it,

 

I don't know if this is an issue with the 09-11's but it is with the 04-08's. The OEM 20x8.5 inch wheels have 6.5 inches of backspacing. This pulls the wheels really far inward. On the previous generation, a lot of aggressive 12.50 inch wide tires with aggressive sidewalls will touch the upper control arm/ball joint. That's why a lot of people with the OEM 20's are running narrower tire widths.

 

That's why I asked if wheel spacers will work

 

There is a good chance that wheel spacers will cause you vibration issues.