General Motors recently introduced the all-new Chevrolet Trailblazer intended for global markets. This definitely isn’t a crossover as it is based on an all-new body on frame chassis that will be used on the next Chevrolet Colorado truck. GM internally refers to this new platform as "31xx".
The Trailblazer isn’t one of the models that will be available in North America (U.S. and Canada) but it’s possible that this will change especially since the 31xx platform has a production outlet in Wentzville, MO. There isn’t a lot going on with the GMC brand.
It has recently launched the Terrain and the updated HD trucks but no new product has been released in the past few years. This has led to speculations that GMC should consider making a 31xx-based Envoy for itself. It is obvious that Chevrolet’s focus is on small cars as part of efforts to raise its “green” reputation.
This suggests that the Chevrolet brand may not be thinking about adding a BOF SUV to its lineup anytime soon. On the other hand, GMC is a truck brand and will benefit from a "Professional Grade" midsize SUV. It’s believed that rather than offering the Trailblazer in the country, it will work on an Envoy and allow GMC to sell it exclusively.
It won’t be hard to swap out the Trailblazer front end for the GMC since there will be a GMC small truck built on the same platform. Another aspect to consider is that a new Envoy would sell higher than the Trailblazer. The lone obstacle would be if GMC's crossover lineup would cannibalize sales. It’s possible that by the time this Envoy could launch, GMC would already have a smaller Terrain and smaller Acadia. This means that Envoy would have to theoretically be positioned between the Terrain and Acadia. [source: GMInsideNews]