| 1 | | 40169206 | 11603373 | 40169206 | NUT, PINION FLANGE 11.5/12.0 T1XX | Sold as Individual Part (40169206) or Kit (120T1342GEARKIT) (74067028) | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 2 | | 40208236 | 85111014 | 40208236 | PINION FLANGE DAMPER ASM 11.5/12.0 3.42 T1XX (85111014) | Sold as individual PN | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 3 | | 40224876 | | | DEFLECTOR, PINION FLANGE 11.5/12.0 T1XX | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 4 | | 40189030 | 84757357 | 40189030 | SEAL - PINION FLANGE 11.5 RAM 2019/12.0 T1XX | Sold as Individual Part (40189030) or Kit (120T1342GEARKIT) (74067028) | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 5 | | 40172133 | 84757358 | 74067028 | TAIL BEARING ASM, TAPERED CONE AND CUP | Sold as Kit (74067028) | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 6 | | 40167593 | 84757349 | 40167593 | SPACER, PINION BEARING 11.5/12.0 T1XX | Sold as Individual Part (40167593) or Kit (120T1342GEARKIT) (74067028) | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 7 | | 40220929 | | | CARRIER ASM, CAPS AND (REF) | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 8 | | 40195031 | 84757384 | 40195031 | HEAD BEARING ASM, TAPERED CONE AND CUP | Sold as Individual part and as Kit (74067028) | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 9 | | 40172152 | | | CHART - SHIM, PINION 11.5/12.0 T1XX (CHART 40172152) | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 10 | | 40244339 | | | BEARING CAP (MACHINED) - 12.0 T1XX | Not Offered | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 11 | | 40142173 | 11603377 | | BOLT - BEARING CAP 12.0 T1XX | Not Offered | 4 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 12 | | 40104190 | 84031696 | 40104190 | ADJUSTER, DIFF BEARING 11.5/12.0 | Sold as Individual Part (40104190) or Kit (74067028) | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 13 | | 40164306 | 84757352 | 40164306 | GASKET - COVERPAN 11.5/12.0 T1XX | Sold as Individual Part | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 14 | | 40210056 | 84757353 | 40210056 | COVER ASM, DIFF CARRIER | Sold as Individual Part | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 15 | | 40048135 | 24045309 | | PLUG, FILL/DRAIN | Sold as Individual Part | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 16 | | 40002169 | 12471307 | 40002169 | COVER PAN BOLT | Sold as Individual Part | 12,10 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 17 | | 40041239 | 11603372 | 40041239 | COVER PAN CAP ASM | Sold as Individual Part | 2,4 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 18 | | | | | AXLE TUBE ASM (FINISHED) 11.5/12.0 (RH) T1XX DW | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 19 | | | | | AXLE TUBE ASM (FINISHED) 11.5/12.0 (LH) T1XX DW | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 20 | | 40173671 | 84757382 | 74067028 | DIFF BEARING ASM, TAPERED | Sold as Kit (74067028) | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 21 | | 40168524 | 84757348 | 74067028 | LOCK - DIFF ADJUSTING NUT 11.5/12.0 T1XX | Sold as Kit (74067028) | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 22 | | 40181318 | 11603333 | 40181318 | BOLT - ADJ NUT LOCK W/LOCTITE (M8 X 1.25) 3RD MBR 10.5 610/11.5 & 12.0 T1XX | Sold as Individual Part | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 23 | | 40143851 | 84138915 | 74067028 | RETAINER, SPEED SENSOR 10.5/11.5/12.0 DW VSES | Sold as Kit (74067028) | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 24 | | 40164630 | 84757387 | 40164630 | EXCITER RING (33T) 12.0 T1XX / 12.0 RAM | Sold as Individual Part | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 25 | | 40188285 | 84757383 | 120T1342GEARKIT | GEAR SET 12.0 12x41 (3.42) T1XX | Sold as Kit (120T1342GEARKIT) | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 26 | | 40197612 | 11603376 | 40197612 | BOLT, M14 X 1.25 - RAM / T1XX 12.0 | Sold as Individual Part | 12 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 27 | | 84989576 | 84989576 | | DIFF CASE ASM - LOCKER 12.0 33T DW T1XX | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 27 | | 84989575 | 84989575 | | DIFF CASE ASM - LOCKER 12.0 31T SW T1XX | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 28 | | 26063647 | 26063647 | 26063647 | CONNECTOR, VENT HOSE | Sold as Individual Part | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 29 | | 40008079 | | 40008079 | CAP, VENT CONNECTOR | Sold as Individual Part | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 30 | | 40175943 | 84757389 | 40175943 | AXLE SHAFT MACHINED 12.0 DW-PU / DW-WT T1XX (OSP) | Sold as Individual Part | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 30 | | 40175995 | 84757392 | 40175995 | AXLE SHAFT MACHINED 12.0 DW-NT T1XX (OSP) | Sold as Individual Part | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 30 | | 40165706 | 84757405 | 40165706 | AXLE SHAFT MACHINED 11.5 L5P/12.0 SW T1XX | Sold as Individual Part | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 31 | | 40023476 | 20920619 | 40023476 | BOLT, AXLE SHAFT HEX 1/2-13X1.25, LOCTITE | Sold as Individual Part | 16 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 32 | | 40175625 | - | | PLUG, SENSOR 11.5 T1XX | Not Offered | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 33 | | 11570881 | 11570881 | | BOLT, HEX M16 X 2.0 PARK BRAKE | Not Offered | 8 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 34 | | 86792661 | 86792661 | | HUB & ROTOR ASM 11.5/12.0 DW T1XX | Not Offered | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 35 | | 85003007 | | | HUB ASM 11.5/12.0 SW T1XX | Not Offered | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 36 | | 13529522 | 13529522 | | ROTOR 11.5/12.0 SW T1XX | Not Offered | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 37 | | 40205499 | 11603599 | 74070010 | HUB NUT ASM 2.375 X 16 - 11.5/12.0 DW T1XX | Sold as kit 74070010 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 37 | | 40092024 | 84855809 | 74070009 | HUB NUT ASM 2.375 X 16 - 11.5/12.0 SW T1XX | Sold as kit 74070009 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 38 | | 40176514 | 84757390 | 40176514 | GASKET, HUB 11.5/12.0 DW T1XX | Sold as individual part and as kit 74070010 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 38 | | 40051851 | 20920620 | 40051851 | GASKET, HUB 11.5/12.0 SW T1XX | Sold as kit 74070009 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 39 | | 40179375 | | 74070010 | BEARING RACE - HUB OUTER DW | Sold as kit 74070010 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 40 | | 40179376 | | 74070010 | BEARING ROLLER - HUB OUTER DW | Sold as kit 74070010 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 39 | | 40059214 | | 40059214 | BEARING RACE - HUB OUTER SW | Sold as Individual Part and as kit 74070009 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 40 | | 40059215 | | 40059215 | BEARING ROLLER - HUB OUTER SW | Sold as Individual Part and as kit 74070009 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 41 | | 40179373 | | 74070010 | BEARING RACE - HUB INNER DW | Sold as kit 74070010 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 42 | | 40179374 | | 74070010 | BEARING ROLLER - HUB INNER DW | Sold as kit 74070010 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 41 | | 40059216 | | 40059216 | BEARING RACE - HUB INNER SW | Sold as Individual Part and as kit 74070009 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 42 | | 40059217 | | 40059217 | BEARING ROLLER - HUB INNER SW | Sold as Individual Part and as kit 74070009 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 43 | | 84271030 | 84271030 | 74070010 | SEAL - HUB DW | Sold as kit 74070010 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 43 | | 20889025 | 20889025 | 20889025 | SEAL - HUB SW | Sold as Individual Part and as kit 74070009 | 2 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 44 | | 18026702 | 18026702 | | BOLTS-REAR BRAKE CALIPER M16X2-6G DW NT | Not Offered | 4 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 45 | | 86792655 | 86792655 | | CALIPER ASM 11.5/12.0 DW (RH) T1XX | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 46 | | 86792654 | 86792654 | | CALIPER ASM 11.5/12.0 DW (LH) T1XX | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 47 | | 85114294 | 85114294 | | PARK BRAKE ASM 11.5/12.0 (RH) T1XX | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| 48 | | 85114295 | 85114295 | | PARK BRAKE ASM 11.5/12.0 (LH) T1XX | Not Offered | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| Kit | 120T1342GEARKIT | | | 120T1342GEARKIT | Ring and Pinion Kit 12.0" 3.42 | Includes Gearset, pinion seal, Nut, and Spacer | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| Kit | 74067028 | | | 74067028 | Master Bearing Kit T1 12.0" HD Rear 2019+ | Head, Tail and Differential bearing assemblies; pinion seal, nut, spacer, adjuster and loc | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| Kit | 74070009 | | | 74070009 | End Wheel kit T1 12.0" SRW | Includes Inner and Outer hub bearings, hub seal, nut assembly reteiner, hub gasket and bol | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
| Kit | 74070010 | | | 74070010 | End Wheel kit T1 12.0" DRW | Includes Inner and Outer hub bearings, hub seal, nut assembly reteiner, hub gasket and bol | 1 | Silverado 2500, 3500; Sierra 2500, 3500 | 2019-2024 | | |
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