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-0234.
CHEVROLET/GMC: DISABLE AUTO DOOR LOCKING FOR EMERGENCY RESPONSE VEHICLES. IN ORDER TO DISABLE THE AUTO DOOR LOCKING FUNCTION, IT IS NECESSARY TO REPROGRAM THE BCM. *PE UPDATED ON 06/27/2011. *KB