Citing a lack of engineering and other resources at this time, GM quietly admits that it has dropped plans to bring out a 6-door version of the Suburban. A spokesman says that a prototype was actually built, but the company was not satisfied with the results.

It is seeking other engineering solutions to give greater access to the third row of seats in the giant SUV, the spokesman says. But he declined to give any time frame for when such changes might go into production.