According to napaonline.com, the '99 and '02 have the same PS cap. :huh:
Per Randy's spreadsheet, PS1 caps were sent to all 97-02 trucks, and PS2 caps were sent to all 03-04 trucks. The PS1 cap is wider but shorter than the PS2 cap.the master and ps caps are the same for 97-2004 and possibly other models as well. I found this when I did my prototype R&D. Some other caps are different though.
The thing that really has me scratching my head is the fact that 24 kits received PS1 caps but only 7-8 people complained, and only 5 of those caps have been returned to me. The people who sent them back do not have a consistant year/make/model to make me think that Randy's spreadsheet was only off for a particular year.