Romain Grosjean is to make a surprise return to GP2 with DAMS for this weekend's Hockenheim races.
The former Renault grand prix driver replaces Jerome d'Ambrosio, who is being stood down for one event only as his management company Gravity seeks to improve his performances. The Belgian won the Monaco sprint race but has otherwise struggled for speed this year.
"With testing strictly controlled in this category, Gravity Sport Management has made this decision in order to analyse the reasons why the d'Ambrosio/DAMS pairing has been unable to fully unlock its potential so far this season," said a statement from Gravity.
Grosjean won the 2007/08 GP2 Asia title and was fighting for the 2009 GP2 main series crown when he was promoted to the Renault Formula 1 team in place of the sacked Nelson Piquet.
But his F1 move proved disastrous and having failed to score a point, he lost his seat at the end of the year. He has since raced in the GT1 World Championship and Auto GP - the latter with DAMS - and is a title challenger in both series.
Grosjean said his main aim for Hockenheim was to help DAMS find more speed before handing the car back to d'Ambrosio for the Hungaroring round.
"I'm happy to be back on the GP2 Series grid again," he said. "It's a very hotly-contested championship in which I was aiming for the title when I was recruited for Formula 1.
"As always, I can't wait to get out there on the track again and try to score the best possible result, and also to help the team solve the performance problems they've encountered this season. I think that is the biggest motivation for all three of us - Jerome, Ho-Pin [Tung], myself - and I'm sure we can do a good job."