Sorry, the NHTSA has not posted this TSB document yet.
You can still get the detailed info from Chevrolet for this TSB. Call your local Chevrolet dealer's service department & ask for a copy of TSB# G-190846 .
14134 - SERVICE UPDATE (SERVICE BULLETIN INCLUDED). THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPROGRAM THE ENGINE CONTROL MODULE (ECM) WITH A NEW CALIBRATION. THESE VEHICLES WERE BUILT WITH A NEW PULLED-AHEAD 2015 MODEL YEAR DUAL-MASS FLYWHEEL AS PART OF A NOISE REDUCTION STRATEGY. HOWEVER, IT WAS DISCOVERED THAT THE FLYWHEEL IS NOT COMPATIBLE WITH THE 2014 MODEL YEAR ECM CALIBRATION. THIS CAN RESULT IN AN OBDII NONCOMPLIANCE CONCERN RELATED TO UNSATISFACTORY ENGINE MISFIRE DETECTION
