2021 GMC Yukon Drivetrain Parts

This table covers the actuators that engage four-wheel drive at the transfer case or axle. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same. Read more

4 4WD Actuator parts for the 2021 GMC Yukon come from 3 brands — AAM, GM GENUINE and WELLS. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

Part numbers include AAM 40244942, AAM 40270497 and GM GENUINE 85073905, among others listed above.

This table covers the 4WD Actuator Clutch shafts. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 85520528.

This table covers the 4WD Actuator Clutch sleeves. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 85120721.

This table covers the 4WD Actuator housings. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 84242534.

This table covers the Axle / Differential assemblies. Read more

4 Axle / Differential Assembly parts for the 2021 GMC Yukon come from GM GENUINE. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

This group includes GM GENUINE 85707712, GM GENUINE 85524484 and GM GENUINE 85524485 and the remaining parts above.

This table covers the Axle housings. Read more

2 Axle Housing parts are listed for the 2021 GMC Yukon, from ACDELCO and GM GENUINE.

This group includes ACDELCO 84766420 and GM GENUINE 85070827.

This table covers the seals at the Axle Intermediate Shaft. 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 Intermediate Shaft Seal parts for the 2021 GMC Yukon come from GM GENUINE. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

This group includes GM GENUINE 23371177 and GM GENUINE 84983738.

This table covers the Axle shafts. Read more

9 Axle Shaft parts for the 2021 GMC Yukon come from 2 brands — AAM and GM GENUINE. The "Popular" part is GM GENUINE 87821660. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

This group includes GM GENUINE 87821660, AAM 40185479 and AAM 40199503 and the remaining parts 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

This group shows a single part: GM GENUINE 84428298.

This table covers the Axle Shaft Lock / Snap rings. Read more

3 Axle Shaft Lock / Snap Ring parts for the 2021 GMC Yukon come from GM GENUINE. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

Part numbers include GM GENUINE 11603361, GM GENUINE 84428312 and GM GENUINE 84428317.

This table covers the Axle Shaft Pilot 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 FD102.

This table covers the Axle Shaft retainers and clips. Read more

One part is listed for the 2021 GMC Yukon — DORMAN 13851.

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

5 Axle Shaft Seal parts are listed for the 2021 GMC Yukon, from GM GENUINE, NATIONAL and TIMKEN. NATIONAL 710648 carries the "Popular" badge. All of them fit every engine offered in the 2021 Yukon.

This group includes NATIONAL 710648, GM GENUINE 84649193 and GM GENUINE 84428310 and the remaining parts above.

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

One part is listed for the 2021 GMC Yukon — GM GENUINE 26063647.

This table covers the complete CV axle shafts from differential (or hub) to wheel. Typical signs include a click in tight turns, grease flung around the wheel well, or a vibration that builds with speed. A torn boot caught early is a boot kit; caught late it is the whole axle. Torque the axle nut to the method in the notes. Read more

10 CV Axle parts are listed for the 2021 GMC Yukon, from TRAKMOTIVE, TOP NOTCH, GSP and 1 other brand. TOP NOTCH TN20181XDP carries the "Popular" badge. All of them fit every engine offered in the 2021 Yukon.

The Specialty - For Lifted Vehicles section lists 3 options from TOP NOTCH, GSP and TRAKMOTIVE — grouped under the catalog's "Specialty - For Lifted Vehicles" designation — the notes column spells out what sets them apart. TOP NOTCH TN20181XDP is listed in this group.

The Standard Replacement section lists 7 options from TRAKMOTIVE, GM GENUINE, TOP NOTCH and 1 other brand — built to original-equipment specification. TOP NOTCH TN20092 is listed in this group.

This table covers the constant-velocity joints at each end of a drive axle. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 87842369.

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

GM GENUINE supplies the 5 CV Joint Boot parts for the 2021 GMC Yukon. All of them fit every engine offered in the 2021 Yukon.

Part numbers include GM GENUINE 27172764, GM GENUINE 84392106 and GM GENUINE 84849629, among others listed above.

This table covers the bands that clamp a CV boot to the joint. Read more

5 CV Joint Boot Band parts for the 2021 GMC Yukon come from GM GENUINE. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

Part numbers include GM GENUINE 11603287, GM GENUINE 11603288 and GM GENUINE 84167063, among others listed above.

This table covers the CV Joint Lock rings. Read more

2 CV Joint Lock Ring parts for the 2021 GMC Yukon come from GM GENUINE. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

This group includes GM GENUINE 23369006 and GM GENUINE 84983780.

This table covers the Differential Bearing retainers. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 84881472.

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

2 Differential Carrier parts are listed for the 2021 GMC Yukon, from AAM and GM GENUINE. All of them fit every engine offered in the 2021 Yukon.

Listed part numbers: AAM 40270764 and GM GENUINE 85644584.

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

4 Differential Carrier Bearing / Race parts are listed for the 2021 GMC Yukon, from AAM and GM GENUINE. All of them fit every engine offered in the 2021 Yukon.

This group includes AAM 74067035, AAM 74067036 and GM GENUINE 85722139 and the remaining parts above.

This table covers the Differential Carrier bolts. Read more

4 Differential Carrier Bolt parts for the 2021 GMC Yukon come from GM GENUINE. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

This group includes GM GENUINE 11561300, GM GENUINE 11602523 and GM GENUINE 11548870 and the remaining parts above.

This table covers the Differential Carrier 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

GM GENUINE supplies the 6 Differential Carrier Bushing parts for the 2021 GMC Yukon. All of them fit every engine offered in the 2021 Yukon.

Listed part numbers: GM GENUINE 84214010, GM GENUINE 23243748 and GM GENUINE 23280848, plus the other parts above.

This table covers the Differential Carrier shims. Read more

6 Differential Carrier Shim parts for the 2021 GMC Yukon come from GM GENUINE. The "Popular" part is GM GENUINE 22835276. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

Part numbers include GM GENUINE 22835276, GM GENUINE 22835268 and GM GENUINE 84428332, among others listed above.

This table covers the Differential control modules. Read more

3 Differential Control Module parts for the 2021 GMC Yukon come from GM GENUINE. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

Part numbers include GM GENUINE 86586531, GM GENUINE 84946602 and GM GENUINE 85103067.

This table covers the Differential covers. Read more

This group shows a single part: AAM 40182934.

This table covers the Differential Cover bolts. Read more

GM GENUINE supplies the 6 Differential Cover Bolt parts for the 2021 GMC Yukon. GM GENUINE 11602538 carries the "Popular" badge. All of them fit every engine offered in the 2021 Yukon.

Part numbers include GM GENUINE 11602538, GM GENUINE 11546347 and GM GENUINE 11603344, among others listed above.

This table covers the gaskets that seal the Differential Cover. 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

3 Differential Cover Gasket parts are listed for the 2021 GMC Yukon, from GM GENUINE and DORMAN. 2 parts fit every engine; the other 1 is engine-specific.

Part numbers include DORMAN 926110, GM GENUINE 84428297 and GM GENUINE 85720902.

This table covers the Differential Fill drain plugs. Read more

GM GENUINE supplies both parts for the 2021 GMC Yukon. All of them fit every engine offered in the 2021 Yukon.

Listed part numbers: GM GENUINE 55573646 and GM GENUINE 84479772.

This table covers the Differential Lock 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 GMC Yukon — GM GENUINE 85014370.

This table covers the thrust blocks in a locking differential. Read more

GM GENUINE supplies both parts for the 2021 GMC Yukon. All of them fit every engine offered in the 2021 Yukon.

Listed part numbers: GM GENUINE 88983789 and GM GENUINE 88983796.

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

6 Differential Pinion Bearing / Race parts for the 2021 GMC Yukon come from GM GENUINE. The "Popular" part is GM GENUINE S1395. 5 parts fit every engine; the other 1 is engine-specific.

Listed part numbers: GM GENUINE S1395, GM GENUINE 85722137 and GM GENUINE 84881466, plus the other parts above.

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

6 Differential Pinion Bearing Baffle parts for the 2021 GMC Yukon come from GM GENUINE. The "Popular" part is GM GENUINE 22943114. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

Listed part numbers: GM GENUINE 22943114, GM GENUINE 12479162 and GM GENUINE 84766409, plus the other parts above.

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

2 Differential Pinion Flange parts are listed for the 2021 GMC Yukon, from AAM and GM GENUINE. All of them fit every engine offered in the 2021 Yukon.

This group includes AAM 40221063 and GM GENUINE 84922909.

This table covers the Differential Pinion nuts. Read more

GM GENUINE supplies the 3 Differential Pinion Nut parts for the 2021 GMC Yukon. 2 parts fit every engine; the other 1 is engine-specific.

Part numbers include GM GENUINE 09783762, GM GENUINE 88891763 and GM GENUINE 84697856.

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

8 Differential Pinion Seal parts are listed for the 2021 GMC Yukon, from GM GENUINE, TIMKEN, NATIONAL and 1 other brand. NATIONAL 711033 carries the "Popular" badge. All of them fit every engine offered in the 2021 Yukon.

This group includes NATIONAL 711033, USA STANDARD GEAR USA30355 and GM GENUINE 23243853 and the remaining parts above.

This table covers the Differential Pinion Shaft Lock bolts. Read more

This group shows a single part: GM GENUINE 11546644.

This table covers the Differential Pinion shims. Read more

GM GENUINE supplies the 7 Differential Pinion Shim parts for the 2021 GMC Yukon. GM GENUINE 26043991 carries the "Popular" badge. All of them fit every engine offered in the 2021 Yukon.

This group includes GM GENUINE 26043991, GM GENUINE 23114042 and GM GENUINE 23114043 and the remaining parts above.

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

6 Differential Ring and Pinion parts are listed for the 2021 GMC Yukon, from AAM and GM GENUINE. AAM 80T1373GK carries the "Popular" badge. 5 parts fit every engine; the other 1 is engine-specific.

Listed part numbers: AAM 80T1373GK, AAM 80T1323GK and AAM 80T1342GK, plus the other parts above.

This table covers the Differential Ring Gear bolts. Read more

GM GENUINE supplies both parts for the 2021 GMC Yukon. All of them fit every engine offered in the 2021 Yukon.

Part numbers include GM GENUINE 11546991 and GM GENUINE 84881474.

This table covers the Differential Side Bearing spacers. Read more

This group shows a single part: GM GENUINE 84428331.

This table covers the Differential Spider gears. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 84881475.

This table covers the Differential washers. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 14039026.

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

5 Drive Shaft parts for the 2021 GMC Yukon come from 4 brands — GM GENUINE, DORMAN, TRAKMOTIVE and 1 other brand. The "Popular" part is DORMAN 938384. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

Listed part numbers: DORMAN 938384, GM GENUINE 85816901 and GM GENUINE 87821415, plus the other parts above.

This table covers the Drive Shaft bolts. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 11602575.

This table covers the Drive Shaft End yokes. Read more

GM GENUINE supplies both parts for the 2021 GMC Yukon. All of them fit every engine offered in the 2021 Yukon.

Part numbers include GM GENUINE 84881462 and GM GENUINE 85524483.

This table covers the Drive Shaft retainers. Read more

This group shows a single part: GM GENUINE 11603594.

This table covers the Drive Shaft Slip yokes. Read more

3 Drive Shaft Slip Yoke parts for the 2021 GMC Yukon come from 2 brands — GM GENUINE and AAM. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

This group includes AAM 40114131, GM GENUINE 84389645 and GM GENUINE 84389646.

This table covers the seals at the Drive Shaft Slip 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

One part is listed for the 2021 GMC Yukon — GM GENUINE 24233898.

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

5 Gear Oil parts are listed for the 2021 GMC Yukon, from VALVOLINE and ACDELCO. VALVOLINE VV975 carries the "Popular" badge. All of them fit every engine offered in the 2021 Yukon.

In the SAE 75W-85 grade, ACDELCO supplies 1 part: grouped under the catalog's "SAE 75W-85" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 104091.

In the SAE 75W-90 grade, VALVOLINE supplies 4 parts: grouped under the catalog's "SAE 75W-90" designation — the notes column spells out what sets them apart. A representative part number is VALVOLINE VV975.

This group includes VALVOLINE VV975, ACDELCO 104091 and VALVOLINE 889785 and the remaining parts above.

This table covers the Transfer Case bolts. Read more

This group shows a single part: GM GENUINE 19169068.

This table covers the Transfer Case Clutch Pressure plates. Typical signs include warpage, cracks, or a plate that no longer locates the assembly. Confirm which plate the notes describe — backing plates, clutch plates and strike plates are different parts. Read more

GM GENUINE supplies both parts for the 2021 GMC Yukon. All of them fit every engine offered in the 2021 Yukon.

Part numbers include GM GENUINE 19133077 and GM GENUINE 84184296.

This table covers the Transfer Case Clutch Pressure Plate Return springs. Typical signs include a sagging corner, a broken coil, or a clunk from the spring pocket. Replace springs in axle pairs and inspect the seats. Read more

This group shows a single part: GM GENUINE 19133074.

This table covers the chains that drive the transfer case. Read more

This group shows a single part: GM GENUINE 19133129.

This table covers the Transfer Case Driven Sprocket Retaining rings. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 19133113.

This table covers the fluids specified for the transfer case. Typical signs include discolored fluid, a burnt smell, or a level that keeps dropping. Use only the specification in the notes — the tables group grades because they are not interchangeable. Read more

12 Transfer Case Fluid parts are listed for the 2021 GMC Yukon, from VALVOLINE, ACDELCO, MOBIL and 1 other brand. ACDELCO 109394 carries the "Popular" badge. All of them fit every engine offered in the 2021 Yukon.

In the Dexron grade, ACDELCO, VALVOLINE and MOBIL supply 5 parts: grouped under the catalog's "Dexron" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 109394.

In the Multi-Vehicle grade, VALVOLINE, LUCAS OIL and MOBIL supply 6 parts: grouped under the catalog's "Multi-Vehicle" designation — the notes column spells out what sets them apart. A representative part number is VALVOLINE VV3246.

1 ungrouped part is not assigned to a grade, with the same engine-level match.