Seeking the removal of Chacko, the DMK motion against the JPC chairman is over leaking of the draft JPC report on 2G scam.
The JPC has given a clean chit to Prime Minister Manmohan Singh on 2G spectrum allocation, saying he was "misled" by the then Telecom Minister A Raja whose assurances stood "belied".
Raja has asserted that he took all the decisions in consultation with the prime minister.
Meanwhile, the DMK members of the JPC have readied their dissent note to the panel's draft report.
The party's parliamentary leader TR Baalu said the party would also demand the removal of Chacko as the JPC's chairman.
According to him, everything would be clear at the April 25 meeting of the JPC. The JPC has two DMK members - Baalu and Trichi Siva.
"Our demand is that A Raja should be allowed to depose before the JPC. We are confining our demand to our own issue," he said.
The truth has to come out and for that Raja should be heard at the JPC, Baalu reiterated, while declining to comment on the points on which DMK members of the JPC would be dissenting.
Baalu did not agree with Chacko's reasoning that the telecom ministers during the period under review - 1998 to 2009 - would have to be called for deposition if Raja was called.