CCC INFORMATION SERVICES GROUP INC. EXTENDS EXPIRATION DATE IN THE REPURCHASE OF
          $210 MILLION OF ITS COMMON STOCK THROUGH A SELF-TENDER OFFER


CHICAGO,  August  20,  2004 - CCC INFORMATION SERVICES GROUP INC. (NASDAQ: CCCG)
reported  that  its  self-tender  offer  to repurchase up to $210 million of its
common  stock  at  a price of $18.75 per share, which commenced on July 27, 2004
and  was  previously announced to expire on August 24, 2004, will instead expire
at  5:00 p.m., New York City time on August 27, 2004, unless further extended by
the  company.  The  reason  for the extension is because CCC filed today its new
credit  agreement,  a  portion of the proceeds of which will be used to fund the
purchase of shares in the tender offer and pay associated fees and expenses, and
SEC  rules  require  that  the  offer  be held open for five business days after
filing  of  such  financing  arrangements.

As  of  August  19,  2004,  12,630,198  shares had been tendered into the offer.
The  offer to purchase and related documents have been mailed to stockholders of
record  and are available for distribution to beneficial owners of CCC's shares.
For  questions or information, please call Georgeson Shareholder Communications,
Inc.,  the  information  agent  for  the  self-tender  offer, toll free at (800)
255-4719.

This press release is intended for information purposes only and is not an offer
to  buy or the solicitation of an offer to sell any shares of any class of CCC's
common  stock.  The  solicitation of offers to buy shares of CCC common stock is
only  made  pursuant to the offer to purchase and related materials that CCC has
sent  to  its  stockholders.  Stockholders should read those materials carefully
because  they contain important information, including the various terms of, and
conditions  to, the tender offer.  Stockholders can obtain the offer to purchase
and  related  materials for free at the SEC's website at WWW.SEC.GOV or from our
information  agent, Georgeson Shareholder Communications, Inc., by calling (800)
255-4719.

ONCE  THE  TENDER  OFFER  IS  COMPLETE,  THE  COMPANY  WILL UPDATE ITS FINANCIAL
GUIDANCE  TO  REFLECT  THE  EFFECTS  OF  THE  TRANSACTION.