'Fraid not. There was indeed a recall on Las Vegas Hilton checks, following the change of name earlier this year to the LVH. This occurred when the license granting it the right to use the Hilton name expired and was not renewed (as also happened with the Atlantic City Hilton, now simply the Atlantic). The recall period expired July 15, however, so now your Las Vegas Hilton checks are no longer redeemeable anywhere. (Interestingly, the rule is different in Atlantic City, where every casino check holds its value indefinitely and is always be redeemable, although if the casino that issued it no longer exists, then it must be cashed in with the New Jersey Casino Control Commission. So, if you have checks from the A.C. Hilton, those are still worth their face value.)
Although the name change to LVH took place on January 3, 2012, with the outdoor signage coming down immediately and a new rebranded website launch, when we inquired back in February we were told that the chips weren't scheduled to be changed out until the end of March. A subsequent call estimated that the change would take place a little earlier, but that was the last time we inquired, so we're not sure on what exact date the recall took place. Whenever it was, according to Nevada State Gaming Control Board Regulation 12.070, the former Hilton was obliged to give fair warning (at least 120 days) to allow holders of its chips to redeem them, and in fact the property seems to have gone beyond the required 120 days, unless the recall took place later than planned.
Either way, it's too late now and the only hope for anyone still holding Las Vegas Hilton chips or tokens is if they have a value to collectors. We recommend first checking out the chipguide.com, a state-by-state online guide for casino chip collectors, which features photos and descriptions of more than 4,000 casino chips and is a good place to identify what you have and whether they're anything special, then try the Casino Chip & Gaming Token Collector's Club message boards and/or search "Casino Collectibles" on eBay to see what the current value of your obsolete chips is.
As far as we know, the most an old chip ever fetched was in 2007, when someone paid $100,000 for a $100 denomination chip from the Sahara, which depicted a Sphinx. Prior to that, the record was held by the 2006 sale of a rare $25 chip, also from the Sahara, which depicted a left-facing camel (the main factor in its rarity), which sold for $67,000. We understand that the original buyer bought it on eBay in a lot of chips sold for $1 each, but unless you have something of similar rarity from the Las Vegas Hilton, with the name-change being so recent and doubtless lots of other folks in the same boat as you, we wouldn't recommend getting your hopes up of a major pay day.