I have a 2003 Suburban.

I would like to know how to identify which model I have 1500 or 2500.
How can I find out what engine I have the 6L or 5.4 or ..., and horsepower?
I would like to install a roof clearance/running light and add flood lights to my reverse, how simple would this installation be.

Thanks a ton, I know I may appear as stupid to you suburban gurus, but I envy you as I'm only 16.
Brennan

 

How many lug nuts do you have on each wheel? 1500 has 6 lugs, 2500 and above has 8 lugs. The emissions label under the hood has the engine size on it