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# 08-07-30-033.
Affected Component: POWER TRAIN:AUTOMATIC TRANSMISSION
GMC: TRANSMISSION SLIP, SHUDDER OR GRIND NOISE IN FIRST, SECOND OR REVERSE, DTC P079A SET (REPLACE TRANSMISSION REAR CASE ASSEMBLY). FOR TWO-MODE HYBRIDS WITH 2ML70 AUTOMATIC TRANSMISSION. *PE