Holden is confident that car parts manufacturer Autodom will reopen its doors within 24 hours.
The company went into administration at the weekend, after closing its two Victorian plants indefinitely last week.
Holden says it has guaranteed part of Autodom's debt to ensure 400 workers keep their jobs and parts supplies are maintained.
The car giant does not expect all of Autodom's managers to keep their current roles.
A receiver will be announced later this morning.