Well, I just tried it myself and didn't have any issue when I searched the Camaro6 1LE subforum for 'fuel pump'. I was going to suggest that the problem may be with your browser (I use firefox, not chrome) ... but then I thought to try searching for 'zl1 fuel pump'. Thats when I got a blank screen with the same URL:
http://www.camaro6.com/forums/search.php?do=process
I tried different combinations of 'ZL1', 'fuel', and 'pump' as well as a few other terms in place of 'zl1', like '1LE' and '1SS'. The search behaved normally whenever I did
NOT include 'ZL1'; it was fine with everything else I've tried.
So it looks like somehow, including the term 'ZL1' breaks the site's search function. And I have now reached the limit of my usefulness, I simply don't know enough (or have access to) the inner workings of the site's code to do any more than diagnose where the problem is. Now its up to Tran and/or MarkLS2.
I guess for the time being, either use google to do a site search or figure out a way to ask about the ZL1 fuel pump without actually using 'ZL1' as a search term.