Most of the time the PCM will compensate for the extra cubic inches. The biggest problem is usually the injector(s). How much they flow and or the duration they are on. It will definitely run well enough to find out.
If you are meaning SL they swap no problem. Some of the electronics from the original car will have to be swapped to the donor engine.
The original engine oil drain plug wrench size should be 15mm.
generally you could remove a head and measure the bore with a micrometer. then read specs on the vehicle and what it's original engines bore was. make sure an engine was not swapped into the original engines place.
The 2009 Chevrolet Silverado-3500HD has a V8 engine.
The 2014 Chevrolet Silverado-3500HD has a V8 engine.
The 2013 Chevrolet Silverado-2500HD has a V8 engine.
The 2002 Chevrolet Silverado-2500HD has a V8 engine.
The 2012 Chevrolet Silverado-2500HD has a V8 engine.
The 2007 Chevrolet Silverado-3500HD has a V8 engine.
The 2009 Chevrolet Silverado-2500HD has a V8 engine.
The 2008 Chevrolet Silverado-3500HD has a V8 engine.
The 2012 Chevrolet Silverado-3500HD has a V8 engine.