"Bart Collins" > wrote in
message ...
>
> Thanks for the hints,
> I took the car to my local GM dealer and because they could not
> duplicate the problem, pretty much blew me off. It is intermittent and
> will work for a couple of days and then wander 3 or 4 times in a 30
> minute commute.
> I guess I'll go to the GM Zone manager
>
>
Intermittent problems are a bear to track down.