You are correct:
15x6 with a 6x5.5" bolt pattern. Offset is typically 0", although 0.5" will
work with some wheel-wells.
RJ
> I think I posted last November we had a wheel split on a trip
> to the coast.
> I am getting the GT ready to go on a trip in a few weeks,
> need to replace the wheels. I believe the correct size
> appears to be 15 x 6 and bolt pattern 6 x 5.5", can anyone
> verify? Looks like that may be a Chevy Truck pattern,
> probably can get some replica hubcaps. Looks like too much
> trouble to transfer the original clips.
>
> Thanks,
> Mark
> Stanley NC