Just behind the front bar, at the front of the wheel well, is a body mount. Look there. You should see a bracket coming off the chassis rail, then there should be a rubber 'foot' about 20mm then a bracket for the body. There should be a 12mm bolt through the lot. That's what a stock setup looks like. A body lift will have an extra block either side of that rubber 'foot'
The other option is to use the forum search function for "body lift" and have a surf through the multitude of photos and compare that to your truck.
Or do some research into what a body lift is and compare that to your truck, using a stock dealership vehicle as a comparator.
Or use google for all of the above.