CHEVROLET MEDIUM TRUCK EXHAUST EMISSION TUNE UP LABELS EMISSION YEAR MODEL AND USAGE CODE STANDARDS PART NO 1983 C5 6 W LF5 Fed 15506058 1983 C7 w L43 NB4 Calif 15506059 1983 C6 7 w L86 exc KL7 Calif 15506060 1983 C5 6 W LF5 NB2 Calif 15506061 1983 C5 6 7 w L86 KL7 15506062 1983 C7 w L43 exc NB4 NC7 KL7 15506063 1983 C6 7 W L86 exc NB4 NC7 15506064 1983 P6 w L86 Fed 15506064 1983 P6 W LF5 Fed 15506065 1983 P4 Fed 15506066 WAREHOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION 89 t 596