June 24 (Reuters) - Auto dealer Group 1 Automotive ( GPI )

said on Monday it is taking proactive measures to

protect and isolate its systems from CDK's services, after the

car-dealer software provider's platform faced outages last week.

"Despite the CDK service outage, all Group 1 U.S.

dealerships continue to conduct business using alternative

processes until CDK's dealers' systems are available," Group 1

Automotive ( GPI ) said.

CDK said on Sunday it had begun work to restore its systems

used by over 15,000 dealers across North America.

Bloomberg News reported on Friday that a group of hackers

claiming responsibility for the attack on CDK's software systems

had demanded millions of dollars in ransom to put an end to the

hack.

CDK expects to restore its dealer management system in a few

days while it's unclear how much time will be needed to resume

other affected applications, Group 1 said.