Speculation that the 2017-due new Zafira might be a joint venture followed news this week that Opel will build small MPVs for all three brands at its Spanish plant in Zaragoza.
One is expected to be the next Citroen C3 Picasso, currently produced at a Peugeot-Citroen factory in Slovakia.
The Zaragoza plant currently builds the Opel Zafira and Corsa, and will take on the Mokka next year, a GM Opel vehicle currently built in Korea.
An investment in a 7 percent share in PSA Peugeot-Citroen by GM underpins the cooperation between the two companies, which has already involved savings in purchasing and logistics.
Both operations have significant issues with manufacturing overcapacity.
