Seeking a answer

[XfireZ51]

Originally Posted by 70T/A400

The CPC Group is no longer. We are now comprised of much more corporate oriented groups.

The test tracks are located at the Milford Proving Grounds.

Of course, Pontiac doesn't exist any longer, and u now have GM Powertrain, but was there not a testing facility at Warren? I realize Milford is a different facility, but it looked as if there was some very high fencing at Warren that looked to hide some track testing facilities. This is in the mid 2000's altho looking at Google Maps, there appears not to be.
I worked for a company out of Warren and would stay at the Marriot across Van Dyke.