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# PI-0603.
Affected Component: POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET: INFORMATION REGARDING REDUCTION OF POWER WHEN ACCELERATING AFTER LONG IDLING AND TEMPERATURE OUTSIDE IS 38C (100F) AND AIR CONDITIONING IS IN USE. *PE