GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1995 S/T GMC TRUCKS EQUIPPED WITH 4.3L ENGINES AND MANUAL TRANSMISSIONS MAY HAVE BEEN BUILT WITH AN INCORRECT EMISSION ENGINE FAMILY DESCRIPTION NAME ON THE EMISSION LABEL. TO CORRECT THIS CONDITION, NEW LABELS WILL BE SHIPPED TO VEHICLE OWNERS WITH INSTRUCTIONS ON HOW TO INSTALL THE NEW LABEL. *TW