2021 Chevrolet Silverado 4500 HD Drivetrain Parts

This table covers the Axle / Differential assemblies. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19409051.

This table covers the Axle housings. Read more

5 Axle Housing parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Listed part numbers: GM GENUINE 19406482, GM GENUINE 19406649 and GM GENUINE 19406820, plus the other parts above.

This table covers the Axle shafts. Read more

GM GENUINE supplies the 7 Axle Shaft parts for the 2021 Chevrolet Silverado 4500 HD. GM GENUINE 19405879 carries the "Popular" badge.

Part numbers include GM GENUINE 19405879, GM GENUINE 19406180 and GM GENUINE 19405878, among others listed above.

This table covers the Axle Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19406064.

This table covers the gaskets that seal the Axle Shaft Flange. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19404634.

This table covers the seals where an axle shaft exits the housing. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

2 Axle Shaft Seal parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

This group includes GM GENUINE 19405975 and GM GENUINE 19405928.

This table covers the Axle Vent valves. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

This group shows a single part: GM GENUINE 19408688.

This table covers the boots that keep grease in a CV joint. Typical signs include a split boot, grease flung around the joint, or a click once grit is inside. A boot caught early is a kit. Once the joint has clicked, the joint itself is usually worn. Read more

This group shows a single part: GM GENUINE 19405521.

This table covers the CV Joint Lock rings. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19406001.

This table covers the adjusters that set differential bearing preload. Read more

This group shows a single part: GM GENUINE 19406083.

This table covers the Differential Bearing retainers. Read more

This group shows a single part: GM GENUINE 19407734.

This table covers the carriers that hold the differential gears in the axle. Read more

5 Differential Carrier parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Part numbers include GM GENUINE 19405956, GM GENUINE 19406007 and GM GENUINE 19406084, among others listed above.

This table covers the bearings and races that support the differential carrier. Read more

5 Differential Carrier Bearing / Race parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Part numbers include GM GENUINE 19406081, GM GENUINE 19406082 and GM GENUINE 19407716, among others listed above.

This table covers the Differential Carrier shims. Read more

GM GENUINE supplies the 5 Differential Carrier Shim parts for the 2021 Chevrolet Silverado 4500 HD.

This group includes GM GENUINE 19405944, GM GENUINE 19405945 and GM GENUINE 19405946 and the remaining parts above.

This table covers the Differential covers. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19405982.

This table covers the Differential Cover bolts. Read more

This group shows a single part: GM GENUINE 19405997.

This table covers the Differential Cross pins. Read more

GM GENUINE supplies the 5 Differential Cross Pin parts for the 2021 Chevrolet Silverado 4500 HD.

Listed part numbers: GM GENUINE 19405984, GM GENUINE 19406094 and GM GENUINE 19406095, plus the other parts above.

This table covers the Differential Fill drain plugs. Read more

2 Differential Fill / Drain Plug parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Part numbers include GM GENUINE 19407374 and GM GENUINE 19404657.

This table covers the Differential Housing bolts. Read more

2 Differential Housing Bolt parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Part numbers include GM GENUINE 19407375 and GM GENUINE 19407377.

This table covers the bearings and races on the differential pinion. Read more

GM GENUINE supplies the 5 Differential Pinion Bearing / Race parts for the 2021 Chevrolet Silverado 4500 HD.

This group includes GM GENUINE 19406068, GM GENUINE 19406070 and GM GENUINE 19406105 and the remaining parts above.

This table covers the baffles that control oil at the pinion bearings. Read more

GM GENUINE supplies the 5 Differential Pinion Bearing Baffle parts for the 2021 Chevrolet Silverado 4500 HD.

Part numbers include GM GENUINE 19405970, GM GENUINE 19406025 and GM GENUINE 19406106, among others listed above.

This table covers the flanges that connect the driveshaft to the differential pinion. Read more

This group shows a single part: GM GENUINE 19404515.

This table covers the Differential Pinion nuts. Read more

2 Differential Pinion Nut parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

This group includes GM GENUINE 19405948 and GM GENUINE 19407790.

This table covers the seals at the differential pinion yoke. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

2 Differential Pinion Seal parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Listed part numbers: GM GENUINE 19409547 and GM GENUINE 19406000.

This table covers the Differential Pinion shims. Read more

This group shows a single part: GM GENUINE 19407407.

This table covers kits that group the bearings, races and seals for a differential rebuild. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19408329.

This table covers the ring-and-pinion gear sets that set the axle ratio. Read more

6 Differential Ring and Pinion parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE. The "Popular" part is GM GENUINE 19405971.

Listed part numbers: GM GENUINE 19405971, GM GENUINE 19407378 and GM GENUINE 19407403, plus the other parts above.

This table covers the Differential Ring Gear bolts. Read more

4 Differential Ring Gear Bolt parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Listed part numbers: GM GENUINE 19405077, GM GENUINE 19406117 and GM GENUINE 19407634, plus the other parts above.

This table covers the Differential Spider gears. Read more

5 Differential Spider Gear parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

This group includes GM GENUINE 19405994, GM GENUINE 19406103 and GM GENUINE 19407406 and the remaining parts above.

This table covers the Differential washers. Read more

4 Differential Washer parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

This group includes GM GENUINE 19405938, GM GENUINE 19405940 and GM GENUINE 19406032 and the remaining parts above.

This table covers the driveshafts that carry torque from the transmission or transfer case. Read more

GM GENUINE supplies the 7 Drive Shaft parts for the 2021 Chevrolet Silverado 4500 HD.

Part numbers include GM GENUINE 19405650, GM GENUINE 19406401 and GM GENUINE 19404649, among others listed above.

This table covers the Drive Shaft bolts. Read more

3 Drive Shaft Bolt parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Part numbers include GM GENUINE 19404659, GM GENUINE 19404661 and GM GENUINE 19404866.

This table covers the Drive Shaft Center Support bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

GM GENUINE supplies both parts for the 2021 Chevrolet Silverado 4500 HD.

This group includes GM GENUINE 19405524 and GM GENUINE 19406821.

This table covers the brackets that mount the Drive Shaft Center Support Bearing. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

GM GENUINE supplies the 5 Drive Shaft Center Support Bearing Bracket parts for the 2021 Chevrolet Silverado 4500 HD.

Part numbers include GM GENUINE 19401696, GM GENUINE 19401697 and GM GENUINE 19401698, among others listed above.

This table covers the Drive Shaft End yokes. Read more

6 Drive Shaft End Yoke parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE. The "Popular" part is GM GENUINE 19405516.

This group includes GM GENUINE 19405516, GM GENUINE 19405518 and GM GENUINE 19405793 and the remaining parts above.

This table covers the Drive Shaft retainers. Read more

GM GENUINE supplies both parts for the 2021 Chevrolet Silverado 4500 HD.

This group includes GM GENUINE 19404513 and GM GENUINE 19405160.

This table covers the Drive Shaft Slip yokes. Read more

GM GENUINE supplies both parts for the 2021 Chevrolet Silverado 4500 HD.

This group includes GM GENUINE 19405523 and GM GENUINE 19406298.

This table covers the gear oils specified for the axle or transfer case. Typical signs include a low-oil lamp, knocking, or oil that has gone thin before the next interval. Match the viscosity and spec in the notes, not just the weight on the bottle. Read more

This group shows a single part: ACDELCO 104016.

This table covers the Transfer Case adapters. Read more

GM GENUINE supplies both parts for the 2021 Chevrolet Silverado 4500 HD.

Part numbers include GM GENUINE 19403244 and GM GENUINE 19408067.

This table covers the seals at the Transfer Case Adapter. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

This group shows a single part: GM GENUINE 19405745.

This table covers the Transfer Case bolts. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19405722.

This table covers the Transfer Case control modules. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 85701588.

This table covers the Transfer Case housings. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19405750.

This table covers the seals at the Transfer Case Housing Extension. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19405791.

This table covers the Transfer Case Housing plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19407827.

This table covers the Transfer Case Idler Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

This group shows a single part: GM GENUINE 19407811.

This table covers the Transfer Case Input gears. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19405796.

This table covers the Transfer Case Input shafts. Read more

This group shows a single part: GM GENUINE 19409908.

This table covers the Transfer Case Input Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

3 Transfer Case Input Shaft Bearing parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Part numbers include GM GENUINE 19405768, GM GENUINE 19407801 and GM GENUINE 19407803.

This table covers the Transfer Case Intermediate gears. Read more

This group shows a single part: GM GENUINE 19405755.

This table covers the Transfer Case Locating pins. Read more

This group shows a single part: GM GENUINE 19405758.

This table covers the Transfer Case motors. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19407296.

This table covers the Transfer Case Oil pumps. Typical signs include noise from the pump, no pressure, or fluid that never arrives at the outlet. Prime or fill the pump as the notes require. A dry start is a common way to kill a new unit. Read more

This group shows a single part: GM GENUINE 19405790.

This table covers the Transfer Case Output Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19410095.

This table covers the Transfer Case Output Shaft bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19405730.

This table covers the Transfer Case Output Shaft nuts. Read more

This group shows a single part: GM GENUINE 19405789.

This table covers the Transfer Case Output Shaft washers. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19407795.

This table covers the planetary carriers in the transfer case. Read more

2 Transfer Case Planetary Carrier parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

Part numbers include GM GENUINE 19405766 and GM GENUINE 19407816.

This table covers the forks that move a transfer-case shift collar. Read more

This group shows a single part: GM GENUINE 19405725.

This table covers the vents on the transfer case. Read more

One part is listed for the 2021 Chevrolet Silverado 4500 HD — GM GENUINE 19407862.

This table covers the U-joints in the driveshaft. Read more

2 Universal Joint parts for the 2021 Chevrolet Silverado 4500 HD come from GM GENUINE.

This group includes GM GENUINE 19405527 and GM GENUINE 19406299.