When I bought my 2012 G550, I gave it a very thorough inspection. One of the most underused features of these trucks are the differential lockers. So many poor G’s spend their lives as mall crawlers and through lack of use, the systems can malfunction partially or not work at all. Knowing how to test these can save you THOUSANDS on purchase price. It opens up a huge negotiating window as a potential buyer, should these not function as they should. Enjoy and happy G-shopping!
