I am looking to buy a new Silverado at some point this year, I have a GM card and have had it for almost 10 years. I have yet to get the "earnings top-off" and I have seen many posts about folks getting these. Is this random or do they target specific cardholders or what? If I got an extra $2k or so it would definitely motivate me to buy so I am curious to see what other folks past experience has been.