Need feedback from owners of Silverado PU's, 2011 and up.

I bought a 2013 off the show room floor. It was the biggest pos I have ever owned. The General tried to fix it but only made it worse. The first year it was at the dealership longer than I had it. Absolutely do not buy 1 with a 3 as the first digit in the serial number, 3 means it was assembled in Mexico. I work on them almost everyday and most have the dreaded 3. Kim