Which compressor G or D?

Hi, can anyone verify my compressor on my 2001 Isuzu rodeo 3.2L?
On the firewall it states that it is a "D" series compressor, however the guy I'm buying a compressor from said they screwed up on the tags, so it makes it harder to figure out which one it is until you remove it.
My isuzu was manufactured in Sep of 2000.
Thanks, Brian.

I think there was a few running changes in 2000. I know they started using different ISC shocks midway through the year. The tag on the firewall should be correct. Have you called an Isuzu dealership?

Yea, but they are baffled!!!