CHEVROLET\BUICK\GMC\SATURN SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. VEHICLES MAY HAVE A CONDITION IN WHICH THE POWER BRAKE ASSIST MAY BE TEMPORARILY REDUCED WHEN THE VEHICLE IS OPERATED IN TEMPERATURES OF -5% TO -49% F (-21% TO -45% C). IN EXTREME COLD TEMPERATURES, THE OPENING OF ONE OR BOTH THE POWER BRAKE BOOSTER VACUUM CHECK VALVES MAY BE DELAYED. RESULTING IN REDUCED POWER BRAKE ASSIST. CSC LETTER WAS RECEIVED (ONLY). *PE PROGRAM IS IN EFFECT UNTIL 6/3011. *PE UPDATED ON 08.31.2011. *KB
