Sergio Marchionne, FCA’s CEO, disclosed that there is still hope that he could approach GM, once again, with plans of collaboration, according to a report by Automotive News.

Marchionne hasn’t exactly been discreet about his stand on mergers within the industry. He stands firm in his belief that these will help in reducing cost in producing cleaner and more technologically forward models as it could be split among the companies. But, not everyone shares his belief; one example is GM who has turned down this offer numerous times now.

At the recent Geneva Auto Show, the CEO revealed that, “I never close any doors… I may shamelessly try knocking on the GM door again, or any door, if I thought it was a good thing to do for the business, without even blinking, I could.”

He clarified that the PSA-Opel agreement will reduce potential synergies FCA could garner from collaborating with GM by about 15 percent, but it is still very much worth it.

FCA-GM collaboration may bring more advantages than disadvantages though. The Camaro and Challenger have long been rivals but this merger could result in them working together to, finally, topple the Ford Mustang.