EXHIBIT 99.1


                              *** CONFIDENTIAL ***

TO:     Members  of  the  Board  of  Directors  and  Section  16  Officers

FROM:   Robert  Guttman
        Peter  Falconer

RE:     Blackout  Period  for  CCCG  Common  Stock

DATE:   January  6,  2004


This notice is to inform you that the blackout period imposed in connection with
the  transition  to a new service provider for the CCC Information Services Inc.
401(k)  Retirement  Savings  and Investment Plan (the "401(k) Plan"), originally
scheduled  to  end during the week of December 29, 2003, has been extended.  The
blackout  period  is  now  expected  to  end during the week of January 5, 2004.
During  the week of January 5, you can determine whether the blackout period has
ended  by  calling  T.  Rowe  Price  at  1-800-922-9945.

This  extension is necessary as a result of delays in obtaining information from
the  former service provider necessary to complete the conversion of participant
accounts.  Until  the  blackout period ends, you are prohibited from purchasing,
selling  or  otherwise  acquiring or transferring CCC Information Services Group
Inc.  common  stock (and any options or other derivative securities) acquired in
connection  with  your service to or employment with CCC.  Please note that this
blackout  applies  to  all shares of CCC common stock you acquired in connection
with  your  service  or employment and is not limited only to shares held in the
401(k)  Plan.

This  blackout  is  imposed by Section 306 of the Sarbanes-Oxley Act of 2002 and
the  rules  promulgated  thereunder  by  the  Securities and Exchange Commission
commonly  referred  to as Regulation BTR (Blackout Trading Restriction).  By way
of  background, Section 306(a) of the Sarbanes-Oxley Act prohibits directors and
executive  officers  of an issuer from trading in the issuer's equity securities
during  any  period during which employees are unable to purchase or sell issuer
equity  securities  held  in  401(k)  or similar plans.  This period is commonly
referred  to  as  a "blackout period."  A blackout period is usually imposed for
administrative  reasons  such as changes in plan record keepers, introduction of
new  investment  alternatives  or  business  combinations.

Please  note  that, following the end of the blackout period associated with the
401(k)  Plan  conversion,  you  will  remain  subject to the Company's quarterly
securities  trading  blackout  period  and  accordingly  will be prohibited from
trading  in  CCC  common  stock  until  the  expiration of that blackout period.

If  you  have  questions  related  to  the  blackout  period and your ability to
purchase,  sell  or  otherwise  transfer CCC common stock, please contact Robert
Guttman  (312.229.2393)  or  Peter  Falconer  (312.229.2170).