I had to trade a full size Silverado for a Tacoma. Personal reasons. I really missed the roominess and comfort of the Silverado. Gas mileage was not that much better, if it even was at all.
2012 Silverado to 2013 Tacoma.
Years ago I had a 1992 full size Blazer. At around 125K, the torque converter started burning up the trans fluid. It was shooting out from somewhere and ending up all over the rear hatch/window. I want to say it cost around $1400 for a trans rebuild. But that was around 2001/2002.