I don't believe GM is trying to suppress EV or PHEV from arriving in the market. Instead, is this a move by GM to further test out PHEV vehicles and technology at a lesser price than if they did it all on their own? It is in GM's own interest to offer PHEV and EV products in the competitive automobile market place.

2005 AWD Escape Hybrid
Best Interstate tank trip MPG 39.02 (scangauge II) for 402 miles on I-70, 10.3 gallons used over mostly flat terrain.

Best Interstate tank trip E30 MPG 34.6 for 271 miles along I-80 in Indiana and Ohio.

Best multiple road tank trip E30 MPG 36.2 for 202 miles in Southwestern Pa.