June 24 Reuters U.S. auto dealers grappled with an ongoing cyber attackled software outage on Monday, with some reverting to manual paperwork as car industry technology provider CDK worked to restore systems used by more than 15,000 retail locations.

The outage impacting CDK39;s dealer management system, used to complete deals, track store profitability and monitor employee compensation, has plunged the auto retail industry into disarray, JPMorgan analysts said last week.

AutoNation, a leading auto retailer in the U.S., said the outage was disruptive and had adversely impacted its business, though its outlets remain open, continuing to sell, service, and buy vehicles.

Peer Lithia Motors said on Monday it had experienced disruptions in its CDKhosted system in North America, and that the incident was likely to have a negative impact on its business operations till the systems are fully restored.

Jim Seavitt, owner of Village Ford dealership in Dearborn, Michigan, said the outage has so far not dampened sales, but it has made the process of getting cars to customers more laborious.

The dealership sold nearly 100 cars during a large sale it put on last week, Seavitt said, but because CDK generates the paperwork needed to formally pass the car off to the customer, those vehicles are in limbo.

Seavitt expects the vehicles to be transferred this week after his team developed other ways to complete the necessary paperwork. CDK has told him that services will likely be down…