Hummer is continuing to be shutdown, despite a late expression of interest in buying the firm from an American company.
According to The Car Connection website, Raser Technologies, a Utah based engineering firm, has twice made a bid for the firm, before and after the deal with Chinese truck maker Sichuan Tengzhong failed to go through.
Raser Technologies has previously produced an electric conversion Hummer H3 prototype.
However, although this means the company is familiar with the Hummer, there is speculation GM is reticent about handing Hummer over to Raser because of the potential threat to its own extended-range EV program.
Spokesmen for Raser and Hummer declined to comment.