Hi
Are there a parts list out there somewhere for a 04 Trailblazer LS
Thanks

Here's one on ebay for a 2002. Check with the seller to see if they have one for your vehicle:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=6762&item=7952439778&rd=1&ssPageName=WD1V

Thanks, DamonZ28