I 1979 ENGINE SERIES NUMBER AND SUFFIX CHART The engine type designation 3 alpha characters Tqlll appeer in the Inlluvylng areas 6 Cyl Stamped nn crankcase right hand side ol enplne rear nl dmrrhutor T15 ll Cyl Stamped on lop lmnt rlglrt hand henk nl cylinder and case close to upper and nl pad Mark IV Stamped on top right hand hank of cylinder and case close to lower end ol pad v 1979 LIGHT DUTY TRUCK ENGINE CODE IDENTIFICATION Q 9 Q C T 6 c T ci 6 M9 sf we ye Ty 6 s S5 s T QS 4 ooo v ey yy v x v 9 ls 4g CALIFORNIA msu AT TTTuDs T cw TAT TAJ TAX TAD TAW G10 TAS TAT TDW TAD TAT Mm KW TAK TM 111 T TAK TM TAD TAA L1 G20 TAS TAL TAD TDU TAT Q T E TAS TAL Tw TAT L1 P10 THB THA 1 TTTA THA L25 292 PZD THB THH THA THH THA THH THA T 030 THH THA THH THA THH THA K30 THH THA THH THA THH THA THH THA THH THA THH THA T T CTT TTA UTF UTTTRT mi A mms GTTT TT UTC K T T T TNS TVR T UTS TTT UTR cw TJgB MH TBQBQWF TBT Ten TBS TRR TMC T TeT Tm T TT J Tez TTT TD TBC TBX l 1D TBP TTT me TBD my TBV mu mw T TFT TBF TBS TF I TRS T C20 TBC TJT TBBT TBD Ten TBV Tw TEW TRR TFT TFK T M TBM TBR TBL TBJ TFJ TFM 1 BZ I FL TRZ T T saTasoT K20 TBB TBD QQ TBW TBU TFT T P20 Tl 4 TFX TFZ TFR TFX TFZ TFX T can TFT Tvs TFT TT s T TBM TEL TFM TFL T G3 TBK Tsw Tea TT u TT T TT w TFK TFU FW TFU T l 3D TFT TFS TFT TFS TFT TFS V T V Psa TJQQFZ TFV Trx TJQATFZ TFY TFX TJEQFZ TT v TT T TTT W A TMR TTM TTT 1 TTMT TTT 111 T T 4T40oT T zo T TLD TLS TLR TTR TLM J T T I Y TTT I I T a0 TLU TLU TLV cw TRR Taz TRR Tnz Tan T TRR TRR TRR LFSTAMT C20 mu TRS TRI TRU TRS mz TRS TRU TRZ T 030 TRU TRT TRU TRT TRU TRT TRTM TRA TRW TRX 1 T W TRX bT i CTT TTT T AT NOTE This chart includes all engine codes affective with start of production 7973 However oade additions and deletions may be noted periodically throughout the model yeah ENERAL MOTORS SERVICE PARTS DF ERATIONS LT TRUCK 52A 29 T T