CHEVROLET HEAVY DUTY TRUCK EXHAUST EMISSION TUNE UP LABELS T FE YEAR MODEL AND IUSAGE STANDARDS PART NO 1981 D9 w LPX VJ9 8922872 1981 N9 w LNF LNU LNV LPX LOU VJ9 8922872 1981 J8 427 2063440 1981 J9 w LNF LPX LOU VJ9 8922872 WAREI IOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION 89 601