BRAKES 50 60 65 4 878 KIT TRAILER BREAKAWAY VALVE 4 4601 1 2479673 Assy 2475721 RN 31 T IncI O Rings Seal Sprgs Exh Valve 1 1 660613 Assy 649579 280857 IncI O Rings Spring Valve 1 1 2020213 Assy 2015819 RN 31 AF 4 878 KNOB TRAILER BREAKAWAY VALVE 4 4633 1 1 651520 Assy 649579 245186 Push Pull Control Button BIack 4 878 NUT TRAILER BREAKAWAY VALVE TWO WAY VALVE 4 4634 1 1 2426078 Assy 649579 239357 B0dy 4 878 PIN TRAILER BREAKAWAY VALVE KNOB 4 4637M 1 1 9027537 Assy 649579 238379 Push Pull Control Button 4 878 PISTON TRAILER BREAKAWAY VALVE 4 4638 1 2497513 Asm 2475121 312355 4 562 Dia RepI 2478585 1 2497514 Asm 2475121 330664 4 864 DIa RepI 2478585 1 1 2496089 Assy 649579 243634 4 878 PLUNGER TRAILER BREAKAWAY VALVE 4 4650 1 1 2445923 Assy 649579 240273 1 1 679074 Assy 2490142 248064 4 878 RETAINER TRAILER BREAKAWAY VALVE 4 4652 1 1 679075 Assy 792064 2490142 248065 4 878 RING O TRAILER BRAKE SYNCHRO VALVE 4 4588 1 1 2499814 Assy 2029228 9 N 11728 AA 1 e ID 1 OD 1 1 2487483 Assy 2029228 9 M N 11728 DX 1 I ID 1 OD 4 878 RING O TRAILER BREAKAWAY VALVE 4 4654 1 2381835 Assy 2475721 N 11728 V ID OD x le Dia PIunger or Piston 1 2381287 Assy 2475721 N 11728 CW Piston St0p ID 1 z OD x D a I 1 1 2426074 Assy 649579 2I40480 Upper Body 1 1 2496091 Assy 649579 243636 L0wer Body 1 1 682841 Assy 649579 248316 Pist0n Rep 2496087 1 2323217 Assy 2475721 N 11728 E Exhaust Valve M ID 103 Dia RU 1 2478593 Assy 2475721 N 11728 CP Sp00I u ID 1 OD x I Dia 1 2478594 Assy 2475721 N 11728 BH Sp00 ID 1 OD x I Dia 1 2478595 Assy 2475721 N 11728 HK End Cap to Body 1 1 3867855 Assy 2490142 235063 P unger I ID OD 2 RU 1 1 9034402 Assy 2490142 231551 4 878 RING TRAILER BRAKE SYNCHRO VALVE 4 4589M 1 1 2052174 Assy 2029228 9 102419 B Backup 638 OD x 395 ID 4 878 RING TRAILER BREAKAWAY VALVE 4 4654H I 2478597 Assy 2475721 51 X 41 Piston Stop I 2478596 Assy 2475721 51 X 94 Port Disc Retaining 1 1 274736 Assy 792064 2490142 239476 Retaining Valve to Body 1 1 679076 Assy 792064 2490142 678224 4 878 SCREW TRAILER BREAKAWAY VALVE COVER 4 4654P 2 2 2496093 Assy 649579 243638 4 878 SEAL TRAILER BRAKE SYNCHRO VALVE 4 4589N 4 4 2359519 Assy 2029228 9 N 12575 4 878 SEAL TRAILER BREAKAWAY VALVE 4 4655 1 2478587 Assy 2475721 600103AK Piston Vee B ock is ID 4 878 SEAT TRAILER BREAKAWAY VALVE 4 4656 1 1 679078 Assy 2490142 283826 Inc Diaphragm Washer 1 1 679979 Assy 2490142 248066 Seat Only 4 878 SPOOL TRAILER BREAKAWAY VALVE 4 4657 I 2024091 Assy 2475721 200948 Rep 2478591 4 878 SPRING TRAILER BRAKE SYNCHRO VALVE 4 4591 1 1 2052175 Assy 2029228 9 600399 VC 1 12 ID x 1 31 Lg 4 Coil 1 1 2052176 Assy 2029228 9 600399 YZ Conical 1 80 ID x 1 19 Lg 3 2 Coil t WAREHOUS NG AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION 78TM I N S reference only Added this issue 4 175 4 878 4 878 AR PART