just to add some more perspective

At work we have 7 late model Colorados

All have been taken bake to dealer within last 12 months with issues

All are under 60,000 kms

Issues include 

1/ Wiring looms rubbing on firewall where enter cabin causing short circuit in computers

2/ Wheels wearing irregularly

3/ Alternaters/ battery failure 

Bad Batch?  The dealer has repaired all under warrantee