According to this page of the SCOTUS web site, underlying plaintiffs timely filed their briefs opposing GM’s bid for certiorari on February 16, 2017. The page shows the briefs as follows (but does not include links to the briefs). So far, the briefs also are not on LAW360.

 

No. 16-764
Title:
General Motors LLC, Petitioner
v.
Celestine Elliott, et al.
Docketed: December 15, 2016
Lower Ct: United States Court of Appeals for the Second Circuit
  Case Nos.: (15-2844, 15-2847)
  Decision Date: July 13, 2016
  Rehearing Denied: September 14, 2016
~~~Date~~~ ~~~~~~~Proceedings  and  Orders~~~~~~~~~~~~~~~~~~~~~
Feb 16 2016 Brief of respondents Ignition Switch Pre-Closing Accident Plaintiffs and Groman Plaintiffs in opposition filed.
Dec 13 2016 Petition for a writ of certiorari filed. (Response due January 17, 2017)
Jan 3 2017 Consent to the filing of amicus curiae briefs, in support of either party or of neither party, received from counsel for petitioner.
Jan 3 2017 Waiver of right of respondents Participating Unitholders to respond filed.
Jan 6 2017 Order extending time to file response to petition to and including February 16, 2017, for all respondents.
Jan 6 2017 Waiver of right of respondents Doris Powledge Phillips, Individually and as Represenative of the Estates of Adam Powledge, Rachel Powledge, Isaac Powledge, Christian Powledge and Jacob Powledge, all deceased to respond filed.
Jan 17 2017 Brief amicus curiae of The Product Liability Advisory Council, Inc. filed.
Jan 17 2017 Brief amicus curiae of National Association of Manufacturers filed.
Jan 17 2017 Brief amici curiae of The Chamber of Commerce of The United States of America, et al. filed.
Feb 16 2017 Brief of respondent Wilmington Trust Company in opposition filed.
Feb 16 2017 Brief of respondents Ignition Switch Pre-Closing Accident Plaintiffs and Groman Plaintiffs in opposition filed.