Seedguy,
There should be a tag attached to them or a sticker somewhere on them. On my '99, I had both. The reason I looked was because a buddy bought an 01. 5 and got the "snowplow" mod put on his... I wanted to compare. I can't help you with the breakdown of what the codes stand for... I'm sure there is someone on this site that can, though. Might want to do a search for the topic.
Loren