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# PIC-5338.
CHEVROLET: SES LIGHT ON AND/OR REDUCED ENGINE POWER ECM SETTING MULTIPLE DTC'S. PRIOR TO REPLACING EITHER THE APP (ACCELERATOR PEDAL POSITION) SENSOR OR THE ECM (ENGINE CONTROL MODULE) PLEASE CHECK THESE COMMON CAUSES OF CONCERN-CHECK TERMINAL TENSION FOR THE APP CIRCUITS; CHECK FOR PROPER ROUTING OF ENGINE WIRING HARNESS. *PE