Well this is new. Do you have proof of this motor being a problem for GM?. The motor has been used in the Colorado/Canyon overseas version of those trucks for a few years now, so you would think the bugs are worked out.
An you cannot compare GM to to the previous daimler or Fiat...Fiat has had a steep learning curve since taking over Chrysler/Jeep. And Diamler had issues with quality control of Chryslers also. Many problems with quality control. I am not sticking up for GM. In fact I'm still ticked about the buyout, but would like to see some facts about GM putting a POS diesel in one of their trucks. Especially in a model that they have invested so much into.
To be perfectly up front here, my Dad retired from GM...I can get a pretty healthy discount..I drive a Toyota 4Runner and choose not to buy GM for reasons stated above. But I believe the new midsize GM trucks are better than the Tacomas... especially the ZR2...The TRD Pro Tacoma cannot compete IMO...YMMV
https://www.youtube.com/watch?v=qPX2TJ4-o30