BUICK EXHAUST EMISSION TUNE UP LABELS EMISSION YEAR MODEL AND USAGE CODE STANDARDS PART NO 1977 A B H 231C JU Fed 1257342 1977 A B H X 231C w A T exc A C JF Hi Alt 1257345 1977 A H 231C JX Calif 1257346 1977 A X 305U AU Fed 460122 1977 A 350J BK Fed 1257640 1977 A B C 350J JZ Fed 1257348 1977 A 350L AY Fed 460125 1977 A X 350L CB Hi Alt 460128 1977 A X 350L AZ Calif 460126 1977 A B C 350H JV Fed 1257349 1977 A B 350R w A T M 38 OH Hi Alt 556515 1977 A B C 350R w A T M 38 OR Calif 556516 1977 A BR 403 OL Hi Alt 556518 1977 B 231A w std htr BL Fed 1259105 1977 B 231A w A C BM Fed 1259108 1977 B X 231C w A C JJ Hi Alt 1257344 1977 B X 231C w A C JW Fed 1257343 1977 B 231C exc A C JX Calif 1257346 1977 B 231C w A T A C JY Calif 1257347 1977 B X 231 w A T A C BK Fed 1257329 1977 B X 301 w A T exc A C FH 528106 1977 B C X 301 w A T A C FF 528105 1977 B 350R w A T M 29 OF Fed 557305 1977 B 350R w A T M 38 OD Fed 556514 1977 B 350R w A T M 29 OM Hi Alt 557307 1977 B 350R w A T M 29 OS Calif 557309 1977 BN BP BZ C 403 ON Hi Alt 557308 1977 BN BP BZ C 403 SH Fed 558429 1977 BR 403 SM Fed 558643 1977 B C 403 OT Calif 556519 1977 H 231A exc A I R BL Fed 1259105 1977 X 231C exc A C JX Calif 1257346 1977 X 231C w A T A C JY Calif 1257347 1977 X 301 w M T exc A C FK 528108 1977 X 301 w M T A C FJ 528107 1977 X 350R OZ Calif 557433 1978 A 196 NL 1259991 1978 A 305H DS Fed 472887 1978 A B 231A Hi Alt 1258690 1978 A B 196 231A NA Fed 1259981 1978 A H X 231A NC Hi Alt 1259983 1978 A B H X 231A ND Calif 1259984 1978 A B X 350L LM Hi Alt 476338 1978 A B 231 3 NH Calif 1264432 1978 A B 231G NG 1259988 1978 A B 231 3 NJ Hi Alt 1259989 1978 A B 231 3 NM Fed 1261107 1978 A B 305U DN Calif 472885 1978 A 305U CY Hi Alt 472884 1978 A X 305U CW Fed 472882 1978 A X 231 A NP Fed 1261106 1978 B 231A w A C NR Hi Alt 1261108 1978 B C 350R HN Hi Alt 560498 1978 B C 403 HY Calif 562199 1978 B C 403 HP Hi Alt 560501 1978 B C 350R HM Calif 562198 1978 B 231A exc A C NA Fed 1259981 1978 B 231A exc A C NC Hi Alt 1259983 1978 B 231A w A C NB Fed 1259982 1978 B 231A w A C NE Calif 1259985 1978 B35 403 HF Fed 560493 1978 B C 403 exc B35 HR Fed 560502 1978 B C 350X NF 1259987 1978 B 301Y exc A C RL 10002735 1978 B 301Y w A C RM 10002736 W WAREHOUSING AND DISTRIBUTION DIVISION DF GENERAL MOTORS CORPORATION B9 526