Well with GMC/Chevy's all I see now on forums and reviews is complaints of shift searching and other transmission problems and the well known lifter failure issue on v8s. Overall ratings on edmunds are worse for Chevy 1500 than Ram 1500.
My last truck and again to be current truck after I sell the Ram back is a 2003 Silverado 1500 with 245,000 miles so i'm not a Chevy hater. I did have to replace the trans at around 180,000 miles and I never towed anything. Not sure what the previous owner used it for, bought it used in 2011 with 67,000 miles.