I 6 CYLINDER ENGINE I I 0 426 ROD Engine Valve Push I 85 86 M1 4 3N 2 14095256 12 N L ROD PUSH PGO 23 38 87 89 M1 4 32 I 10046173 12 4 65 noo Pusn PGO 40 56 Z I 90 91 LM1 4 3B LU2 4 32 LB4 10046173 12 4 65 ROD VLV PUSH PGO 40 56 V 0 4291 BALL NUT ST UD Engine Valve Adjusting 85 89 M1 4 3N 2 I 3744340 12 98 BALL VALVE ROCKER A 90 91 LM1 4 3B LU2 4 32 LB4 3744340 12 98 BALL VLV RKR ARM PGIOIY2 II 9 I 85 89 M 1 4 3N 2 3744341 12 V N L VALVE ROCKER ARM ADJ PGO 23 90 91 LM1 4 sB Luz 4 32 LB4 3744341 12 I N1 NUT vLv 1 ka Ah M beo 2e 4e I I V 85 89 M1 4 3N Z 3814692 12 1 85 STUD VALVE ROCKER ARM 003 O S PGO 40 77 85 89 M1 4 3N 2 3815892 12 1 35 STUD VALVE ROCKER ARM 013 O S PGO 40 77 90 91 LM1 4 3B LU2 4 32 LB4 3814692 12 1 85 STUD VLV RKR ARM BALL OO3 0 S PGO 40 77 90 91 LM1 4 3B LU2 4 32 LB4 3815892 12 1 35 STUD V LV RKR ARM BALL 013 O S V PGO 40 77 0 459 LIFTER RETAINER Engine Valve 85 86 M1 4 3N 4 32 5232720 12 N L LIFTER VALVE PGO 23 37 87 89 M1 4 32 5234890 12 N L LIFTER HYDFLAULIC 90 91 LM1 4 3B LU2 4 32 LB4 5234890 12 N L LIFTER HYD VLV 87 89 M1 4 32 10046165 1 3 10 RETAINER VALVE LIFTER RESTRICTOR PGO 32 77 90 91 LM1 4 3B LU2 4 32 LB4 10046165 1 3 10 RETAINER VLV LFTR RSTR PGO 32 77 A 0 480 GUIDE Engine Valve Lifter 87 89 M1 4 32 14093634 6 1 50 GUIDE VALVE LIFTER PGO 31 9 90 91 LM1 4 3B LU2 4 32 LB4 14093634 6 1 50 GUIDE VLV LFTR PGO 31 9 0 519 CAMSHAFT Engine 8 I 90 91 LM1 4 32 LB4 10088148 1 153 00 CAMSHAFT ENG PGO 36 71 90 91 M1 4 3B LU2 10055487 1 153 00 CAMSHAFT ENG PGO 36 71 85 86 M1 4 3N Z 14077973 1 153 00 CAMSHAFT PGO 20 78 87 89 M1 4 32 10088148 1 153 00 CAMSHAFT PGO 36 71 I 0 529 BOLT RETA INER Engine Camshaft I 87 89 M1 4 32 14093637 2 27 BOLT CM SHF RET SOC TORX DR 1 4 20 5 47 OD PGO 36 81 4 90 91 LM1 4 3B LU2 4 32 LB4 14093637 2 27 BOLT CM SHF RET SOC TORX DR 1 4 20 5 47 OD PGO 36 81 87 89 M1 4 32 10088128 1 3 80 RETAINER CM SHF PGO 36 82 90 91 LM1 4 3B LU2 4 32 LB4 10088128 1 3 80 RETAINER CM SHF PGO 36 82 0 539 BEARING Engine Camshaft I 85 89 M1 4 3N 2 474005 1 19 20 BEARING CM SHF 1 PGO 36 87 85 89 M1 4 3N 2 474006 2 13 50 BEARING CM SHF 2 RR PGO 36 87 85 89 M1 4 3N Z 1 474007 1 19 20 BEARING CM SHF 3 PGO 36 87 90 91 LM1 4 3B LU2 4 32 LB4 474005 1 19 20 BEARING CM SHF 1 PGO 36 87 90 91 LM1 4 3B LU2 4 32 LB4 474006 2 13 50 BEARING CM SHF 2 RR PGO 36 87 90 91 LM1 4 3B LU2 4 32 LB4 474007 1 19 20 BEARlNG CM SHF 3 PGO 36 87 0 603 ROD Engine Piston 85 89 M1 4 3N 2 14077944 6 52 75 ROD CONN PGO 19 3 90 91 LM1 4 3B LU2 4 32 LB4 14077944 6 52 75 ROD CONN PGO 19 3 0 616 BEARING KIT Engine Connecting Rod 85 89 M1 4 3N 2 L 18012481 6 N L BEARING KIT CONN ROD STD PGO 19 4 4 I 85 89 M1 4 3N Z 18012482 6 11 40 BEARING KIT CONN ROD 014MM U S PGO 19 4 90 91 LM1 4 3B LU2 4 32 LB4 18012481 6 N L BEARING KIT CONN ROD STD PGO 19 4 90 LM1 4 3B Z 18012482 6 11 40 BEARING KIT CONN ROD 014MM U S PGO 19 4 0 623 BOLT Engine Connecting Rod Cap 85 89 M1 4 3N Z 14077941 12 1 25 BOLT CONN ROD 3 8 24X49 5MM PGO I V 19 5 90 91 LM1 4 3B LU2 4 32 LB4 14077941 12 1 25 BOLT CONN ROD 3 8 24 X 49 5MM PGO 19 5 l 0 626 NUT Engine Connecting Rod Bolt 85 89 M1 4 3N Z 38616766 12 43 NUT CONN ROD HEX 3 8 24 PGO 19 6 1991 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52M 1 91 0 15 0 426 0 626