2021 Cadillac XT6 Drivetrain Parts

Engine:

Showing parts for every engine. Select an engine to see only what fits.

This page lists 96 drivetrain parts for the 2021 Cadillac XT6, across 37 part types, covering both the 2.0L L4 Turbocharged and the 3.6L V6. Every part shows its brand, manufacturer part number and fitment notes.

On the 2021 Cadillac XT6, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. Most of the listed parts are CV Axle (15 parts), Transfer Case Fluid (7 parts) and CV Joint Boot Band (6 parts). The other 34 part types cover the remaining 68 parts.

Axle Shaft Seal

Brand Part Number Markets Notes Buy
SKF Popular Fits: all 2021 XT6 engines 13544A
🇺🇸 US 🇨🇦 CA
Rear Left
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ACDELCO Fits: 3.6L V6 291363
🇺🇸 US 🇨🇦 CA
GM Original Equipment
Fitment notes — ACDELCO 291363
GM Original Equipment
RearSportSINGLE USEElectronic Twin Clutch Positraction Axle (G99)
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GM GENUINE Fits: all 2021 XT6 engines 23276834
🇺🇸 US 🇨🇦 CA
Rear Left4WD
Fitment notes — GM GENUINE 23276834
Rear Left4WDUnitized SealExc. Electronic Twin Clutch Positraction Axle (G99)
Rear Left4WDPremium LuxuryUnitized SealExc. Electronic Twin Clutch Positraction Axle (G99)
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GM GENUINE Fits: all 2021 XT6 engines 291342
🇺🇸 US 🇨🇦 CA
Rear4WD
Fitment notes — GM GENUINE 291342
Rear4WDNON-CLUTCH SIDEExc. Electronic Twin Clutch Positraction Axle (G99)55mm Diameter
Rear4WDPremium LuxuryNON-CLUTCH SIDEExc. Electronic Twin Clutch Positraction Axle (G99)55mm Diameter
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TIMKEN Fits: all 2021 XT6 engines SL260587
🇺🇸 US 🇨🇦 CA
Rear Right
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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.

CV Axle

Brand Part Number Markets Notes Buy
GM GENUINE Popular Fits: 2.0L L4 Turbocharged 84990738
🇺🇸 US 🇨🇦 CA
Front Left9 Speed Automatic Trans.
Fitment notes — GM GENUINE 84990738
Front Left9 Speed Automatic Trans.with RPO Code ADC8
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TOP NOTCH Popular Fits: all 2021 XT6 engines TN20367
🇺🇸 US 🇨🇦 CA
Front Right4WD
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TRAKMOTIVE Popular Fits: all 2021 XT6 engines GM8491
🇺🇸 US 🇨🇦 CA
AAR Joint Design
Fitment notes — TRAKMOTIVE GM8491
AAR Joint Design
Front Right4WD
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TRAKMOTIVE Popular Fits: all 2021 XT6 engines GM86004
🇺🇸 US
AAR Joint Design
Fitment notes — TRAKMOTIVE GM86004
AAR Joint Design
Front RightFWD
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APWI Fits: 3.6L V6 GM8548
🇺🇸 US
Front RightFWD
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GM GENUINE Fits: all 2021 XT6 engines 86508788
🇺🇸 US 🇨🇦 CA
Universal Joints Included: No
Fitment notes — GM GENUINE 86508788
Universal Joints Included: No
Rear Left4WDExcept Electronic Twin Clutch Positraction Axle (G99)
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GM GENUINE Fits: 3.6L V6 85150636
🇺🇸 US 🇨🇦 CA
Rear LeftSport
Fitment notes — GM GENUINE 85150636
Rear LeftSportElectronic Twin Clutch Positraction Axle (G99)
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GM GENUINE Fits: 3.6L V6 86270999
🇺🇸 US 🇨🇦 CA
Front RightFWD
Fitment notes — GM GENUINE 86270999
Front RightFWD9 speed Automatic trans.
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GSP Fits: all 2021 XT6 engines NCV16016
🇺🇸 US 🇨🇦 CA
Rear Right
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GSP Fits: all 2021 XT6 engines NCV17018
🇺🇸 US 🇨🇦 CA
Front Right4WD
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GSP Fits: all 2021 XT6 engines NCV17013
🇺🇸 US 🇨🇦 CA
Rear Left
Fitment notes — GSP NCV17013
Rear Left
Rear LeftPremium Luxury
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GSP Fits: 3.6L V6 NCV17021
🇺🇸 US 🇨🇦 CA
Front Left
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TOP NOTCH Fits: all 2021 XT6 engines TN20358
🇺🇸 US 🇨🇦 CA
Rear Right
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TOP NOTCH Fits: all 2021 XT6 engines TN20362
🇺🇸 US 🇨🇦 CA
Rear Left
Fitment notes — TOP NOTCH TN20362
Rear Left
Rear LeftPremium Luxury
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TRAKMOTIVE Fits: all 2021 XT6 engines GM86047
🇺🇸 US 🇨🇦 CA
Rear Left
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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.

CV Joint Boot

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 2.0L L4 Turbocharged 85662927
🇺🇸 US 🇨🇦 CA
Front
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GM GENUINE Fits: 2.0L L4 Turbocharged 85662928
🇺🇸 US 🇨🇦 CA
Front9 speed Automatic trans.
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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.

CV Joint Boot Band

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 11611752
🇺🇸 US 🇨🇦 CA
Rear Inboard Inner4WD
Fitment notes — GM GENUINE 11611752
Rear Inboard Inner4WDCrimpStainless Steel (with Serviceable CV Joints)85.1 ID
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GM GENUINE Fits: 2.0L L4 Turbocharged 364038
🇺🇸 US 🇨🇦 CA
Front Outboard OuterSingle Use
Fitment notes — GM GENUINE 364038
Front Outboard OuterSingle UseLarge ClampStamped 95.4MM93MM Inside Diameter
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GM GENUINE Fits: all 2021 XT6 engines 84167063
🇺🇸 US 🇨🇦 CA
Front InnerSINGLE USE
Fitment notes — GM GENUINE 84167063
Front InnerSINGLE USELARGE CLAMP
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GM GENUINE Fits: 2.0L L4 Turbocharged 84167070
🇺🇸 US 🇨🇦 CA
Fits Front InnerEar Clamp, 98MM ID, 8MM Wide
Fitment notes — GM GENUINE 84167070
Fits:
Front InnerEar Clamp, 98MM ID, 8MM Wide
or:
Front OuterEar Clamp, 98MM ID, 8MM Wide
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GM GENUINE Fits: all 2021 XT6 engines 84207707
🇺🇸 US 🇨🇦 CA
Fits Rear Outboard InnerCLAMP
Fitment notes — GM GENUINE 84207707
Fits:
Rear Outboard InnerCLAMPCRIMP, 28 DIAMETER X 10MM WIDE
or:
Rear Inboard OuterCLAMPCRIMP, 28 DIAMETER X 10MM WIDE
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GM GENUINE Fits: 3.6L V6 84167071
🇺🇸 US 🇨🇦 CA
Front Outboard OuterLARGE CLAMP
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This table covers the bands that clamp a CV boot to the joint.

CV Joint Lock Ring

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 90223082
🇺🇸 US 🇨🇦 CA
Front InnerRETAINING
Fitment notes — GM GENUINE 90223082
Front InnerRETAINING30.6 FREE OD,23.2 ID
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GM GENUINE Fits: all 2021 XT6 engines 22727024
🇺🇸 US 🇨🇦 CA
Front Inner28.8X2.5X29.5
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This table covers the CV Joint Lock rings.

Differential Carrier

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 2.0L L4 Turbocharged 24289904
🇺🇸 US 🇨🇦 CA
Front4WD or AWD
Fitment notes — GM GENUINE 24289904
Front4WD or AWD9 speed Automatic trans.3.47 Ratio Transaxle Final Drive (FHB), Stop/Start Engine Control System (KL9)
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GM GENUINE Fits: 2.0L L4 Turbocharged 24289906
🇺🇸 US 🇨🇦 CA
FrontFWD
Fitment notes — GM GENUINE 24289906
FrontFWD9 speed Automatic trans.3.47 Ratio Transaxle Final Drive (FHB), Stop/Start Engine Control System (KL9)
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GM GENUINE Fits: 3.6L V6 24289900
🇺🇸 US 🇨🇦 CA
Front4WD
Fitment notes — GM GENUINE 24289900
Front4WD9 speed Automatic trans.3.49 Ratio (FXC)
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GM GENUINE Fits: 3.6L V6 24289902
🇺🇸 US 🇨🇦 CA
FrontFWD
Fitment notes — GM GENUINE 24289902
FrontFWD9 speed Automatic trans.3.49 Ratio (FXC)
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This table covers the carriers that hold the differential gears in the axle.

Differential Carrier Bearing / Race

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 24237378
🇺🇸 US 🇨🇦 CA
Front4WD
Fitment notes — GM GENUINE 24237378
Front4WD9 speed Automatic trans.Ratio Transaxle Final Drive 3.47,Stop/Start Engine Control System (KL9)68mm O.D.
Front4WD9 speed Automatic trans.68MM O.D.3.49 Ratio (FXC)
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This table covers the bearings and races that support the differential carrier.

Differential Carrier Bolt

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 11609598
🇺🇸 US 🇨🇦 CA
M12X1.75X80.9
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This table covers the Differential Carrier bolts.

Differential Carrier Bushing

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 84905394
🇺🇸 US 🇨🇦 CA
Rear4WD
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GM GENUINE Fits: all 2021 XT6 engines 84417056
🇺🇸 US 🇨🇦 CA
Front4WD
Fitment notes — GM GENUINE 84417056
Front4WDExcept Electronic Twin Clutch Positraction Axle (G99)
Fits:
Front4WDElectronic Twin Clutch Positraction Axle (G99)
or:
Front4WDPremium LuxuryExcept Electronic Twin Clutch Positraction Axle (G99)
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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.

Differential Carrier Fluid Baffle

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 2.0L L4 Turbocharged 24298738
🇺🇸 US 🇨🇦 CA
9 speed Automatic trans.Ratio Transaxle Final Drive 3.47,Stop/Start Engine Control System (KL9)
Fitment notes — GM GENUINE 24298738
9 speed Automatic trans.Ratio Transaxle Final Drive 3.47,Stop/Start Engine Control System (KL9)PlasticPart of Torque Converter Differential Housing Assembly
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GM GENUINE Fits: 2.0L L4 Turbocharged 24298739
🇺🇸 US 🇨🇦 CA
9 speed Automatic trans.Case Side
Fitment notes — GM GENUINE 24298739
9 speed Automatic trans.Case Side3.47 Ratio Transaxle Final Drive (FHB), Stop/Start Engine Control System (KL9)
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GM GENUINE Fits: 3.6L V6 24298740
🇺🇸 US 🇨🇦 CA
9 speed Automatic trans.Bolts To Case Assembly Side
Fitment notes — GM GENUINE 24298740
9 speed Automatic trans.Bolts To Case Assembly Side3.49 Ratio (FXC)
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GM GENUINE Fits: 3.6L V6 24298741
🇺🇸 US 🇨🇦 CA
9 speed Automatic trans.Bolts to Torque Converter Housing Side
Fitment notes — GM GENUINE 24298741
9 speed Automatic trans.Bolts to Torque Converter Housing Side3.49 Ratio (FXC)
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This table covers the baffles that control oil in the differential carrier.

Differential Control Module

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 85001638
🇺🇸 US 🇨🇦 CA
Programming Required: YES
Fitment notes — GM GENUINE 85001638
Programming Required: YES
4WDExcept Electronic Twin Clutch Positraction Axle (G99)
Fits:
SportElectronic Twin Clutch Positraction Axle (G99)
or:
4WDPremium LuxuryExcept Electronic Twin Clutch Positraction Axle (G99)
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This table covers the Differential control modules.

Differential Cover Gasket

Brand Part Number Markets Notes Buy
ELRING Fits: all 2021 XT6 engines B18350
🇺🇸 US 🇨🇦 CA
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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.

Differential Cover Plug

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 23234990
🇺🇸 US 🇨🇦 CA
4WD
Fitment notes — GM GENUINE 23234990
4WD
Fits:
Sportor 4WDPremium Luxury
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This table covers the Differential Cover 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.

Differential Fill / Drain Plug

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 19256069
🇺🇸 US 🇨🇦 CA
Includes Seal
Fitment notes — GM GENUINE 19256069
Includes Seal
Rear Differential4WDM22
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GM GENUINE Fits: all 2021 XT6 engines 19256068
🇺🇸 US 🇨🇦 CA
Rear4WD
Fitment notes — GM GENUINE 19256068
Rear4WDM20X1.5X16
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This table covers the Differential Fill drain plugs.

Differential Oil Slinger

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 23276833
🇺🇸 US 🇨🇦 CA
SLINGER ON TORQUE TUBE
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This table covers the slingers that keep gear oil off the pinion seal.

Differential Pinion Seal

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 87845955
🇺🇸 US 🇨🇦 CA
4WDGROMMET
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TIMKEN Fits: all 2021 XT6 engines SL260561
🇺🇸 US 🇨🇦 CA
Rear
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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.

Differential Ring Gear

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 2.0L L4 Turbocharged 24298251
🇺🇸 US 🇨🇦 CA
Front9 speed Automatic trans.
Fitment notes — GM GENUINE 24298251
Front9 speed Automatic trans.Ratio Transaxle Final Drive 3.47, Stop/Start Engine Control System (KL9)
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GM GENUINE Fits: 3.6L V6 24298250
🇺🇸 US 🇨🇦 CA
Front9 speed Automatic trans.
Fitment notes — GM GENUINE 24298250
Front9 speed Automatic trans.3.49 Ratio (FXC)
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This table covers the Differential Ring gears.

Differential Seal

Brand Part Number Markets Notes Buy
ELRING Fits: all 2021 XT6 engines B18240
🇺🇸 US 🇨🇦 CA
Material: HNBR (hydrogenated nitrile butadiene rubber)
Fitment notes — ELRING B18240
Material: HNBR (hydrogenated nitrile butadiene rubber)
Fits:
Rear Leftwith RPO Code G99
or:
Rearwith RPO Code G99
Fits:
Rear Left4WDBody code: NX26with RPO Code G99
or:
Rear LeftBody code: NW26with RPO Code G99
or:
Rear4WDBody code: NX26with RPO Code G99
or:
RearFWDBody code: NW26with RPO Code G99
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ELRING Fits: all 2021 XT6 engines B18360
🇺🇸 US 🇨🇦 CA
Material: FPM (fluoride rubber)Radial Shaft Seal Design: BS2 BD
Fitment notes — ELRING B18360
Material: FPM (fluoride rubber)Radial Shaft Seal Design: BS2 BD
RearInlet
Fits:
Rear RightBody code: NX26
or:
Rear4WDBody code: NX26Inlet
or:
RearBody code: NW26Inlet
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This table covers the seals at the Differential. 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.

Drive Shaft Retainer

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 23432713
🇺🇸 US 🇨🇦 CA
Fits 4WD
Fitment notes — GM GENUINE 23432713
Fits:
4WD
or:
SINGLE USE
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This table covers the Drive Shaft retainers.

Gear Oil

Brand Part Number Markets Notes Buy
VALVOLINE Popular Fits: all 2021 XT6 engines VV975
🇺🇸 US 🇨🇦 CA
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart
Fitment notes — VALVOLINE VV975
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart
Rear Differential4WD
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ACDELCO Fits: all 2021 XT6 engines 105050
🇺🇸 US
Pentosin CHF-11S33.8 OZ
Fitment notes — ACDELCO 105050
Pentosin CHF-11S33.8 OZ
4WD
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VALVOLINE Fits: all 2021 XT6 engines 889785
🇺🇸 US 🇨🇦 CA
Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
Fitment notes — VALVOLINE 889785
Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
Rear Differential4WD
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VALVOLINE Fits: all 2021 XT6 engines 882505
🇺🇸 US 🇨🇦 CA
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon
Fitment notes — VALVOLINE 882505
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon
Rear Differential4WD
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VALVOLINE Fits: all 2021 XT6 engines 723856
🇺🇸 US 🇨🇦 CA
Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon
Fitment notes — VALVOLINE 723856
Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon
Rear Differential4WD
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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.

Retaining Ring

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 2.0L L4 Turbocharged 24231157
🇺🇸 US 🇨🇦 CA
Front4WD
Fitment notes — GM GENUINE 24231157
Front4WD9 speed Automatic trans.Ratio Transaxle Final Drive 3.47, Stop/Start Engine Control System (KL9)153.59 Installed Nominal160 Free Outside Diameter2.2THKSnap RingDifferential Carrier Internal Gear Retaining Ring
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GM GENUINE Fits: 3.6L V6 24271417
🇺🇸 US 🇨🇦 CA
Front9 speed Automatic trans.
Fitment notes — GM GENUINE 24271417
Front9 speed Automatic trans.3.49 Ratio (FXC)Differential Carrier Internal Gear Retaining Ring
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This table covers the Retaining rings.

Torque Tube

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 85686599
🇺🇸 US 🇨🇦 CA
4WDExcept Electronic Twin Clutch Positraction Axle (G99)
Fitment notes — GM GENUINE 85686599
4WDExcept Electronic Twin Clutch Positraction Axle (G99)
Fits:
SportElectronic Twin Clutch Positraction Axle (G99)
or:
4WDPremium LuxuryExcept Electronic Twin Clutch Positraction Axle (G99)
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This table covers the Torque tubes.

Transfer Case Bolt

Brand Part Number Markets Notes Buy
ELRING Fits: all 2021 XT6 engines 795390
🇺🇸 US 🇨🇦 CA
Housing Bolt
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GM GENUINE Fits: all 2021 XT6 engines 11603660
🇺🇸 US 🇨🇦 CA
4WDM6X1X28
Fitment notes — GM GENUINE 11603660
4WDM6X1X28Hexflange, M6X1X28, 8 Socket, 13 OD, TaptiteHousing Bolt
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GM GENUINE Fits: 3.6L V6 89058602
🇺🇸 US 🇨🇦 CA
4WDM8X1.25X30,24 Thread
Fitment notes — GM GENUINE 89058602
4WDM8X1.25X30,24 ThreadFlange Head17ODHousing Bolt
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This table covers the Transfer Case bolts.

Transfer Case Flange

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 3.6L V6 19132948
🇺🇸 US 🇨🇦 CA
Rear, Output4WD
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This table covers the Transfer Case flanges.

Transfer Case Fluid

Brand Part Number Markets Notes Buy
VALVOLINE Popular Fits: all 2021 XT6 engines VV975
🇺🇸 US 🇨🇦 CA
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart
Fitment notes — VALVOLINE VV975
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart
4WD
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VALVOLINE Popular Fits: all 2021 XT6 engines 889785
🇺🇸 US 🇨🇦 CA
Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
Fitment notes — VALVOLINE 889785
Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
4WD
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VALVOLINE Fits: all 2021 XT6 engines 882505
🇺🇸 US 🇨🇦 CA
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon
Fitment notes — VALVOLINE 882505
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon
4WD
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VALVOLINE Fits: all 2021 XT6 engines 723856
🇺🇸 US 🇨🇦 CA
Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon
Fitment notes — VALVOLINE 723856
Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon
4WD
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VALVOLINE Fits: all 2021 XT6 engines 819195
🇺🇸 US 🇨🇦 CA
VPS Full Synthetic SAE 75W-90 Gear Oil1 Quart
Fitment notes — VALVOLINE 819195
VPS Full Synthetic SAE 75W-90 Gear Oil1 Quart
4WD
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VALVOLINE Fits: all 2021 XT6 engines 902146
🇺🇸 US 🇨🇦 CA
Extended Protection Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
Fitment notes — VALVOLINE 902146
Extended Protection Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
4WD
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VALVOLINE Fits: all 2021 XT6 engines 904644
🇺🇸 US 🇨🇦 CA
VPS Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
Fitment notes — VALVOLINE 904644
VPS Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
4WD
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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.

Transfer Case Gasket

Brand Part Number Markets Notes Buy
ELRING Fits: all 2021 XT6 engines B18330
🇺🇸 US 🇨🇦 CA
4WD
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ELRING Fits: all 2021 XT6 engines B18340
🇺🇸 US 🇨🇦 CA
Rear propshaft at transfer case4WD
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GM GENUINE Fits: 3.6L V6 19132946
🇺🇸 US 🇨🇦 CA
4WD200MM OD/193MM ID
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This table covers the gaskets that seal the Transfer Case. 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.

Transfer Case Housing Extension Seal

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 85136882
🇺🇸 US 🇨🇦 CA
Inner4WD
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GM GENUINE Fits: all 2021 XT6 engines 85136884
🇺🇸 US 🇨🇦 CA
Outer4WD
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GM GENUINE Fits: 3.6L V6 19208892
🇺🇸 US 🇨🇦 CA
Rear4WD
Fitment notes — GM GENUINE 19208892
Rear4WD3.5" I.D
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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.

Transfer Case Input Shaft Seal

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 84823713
🇺🇸 US 🇨🇦 CA
4WDINPUT SHAFT SEAL KIT
Fitment notes — GM GENUINE 84823713
4WDINPUT SHAFT SEAL KITSEAL DRIVER INCLUDED IN KIT
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GM GENUINE Fits: all 2021 XT6 engines 85634029
🇺🇸 US 🇨🇦 CA
4WDIDS SEAL KIT
Fitment notes — GM GENUINE 85634029
4WDIDS SEAL KITSEAL DRIVER INCLUDED IN KIT
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GM GENUINE Fits: 3.6L V6 19132945
🇺🇸 US 🇨🇦 CA
4WD62.25MM OD
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GM GENUINE Fits: 3.6L V6 19210795
🇺🇸 US 🇨🇦 CA
4WD
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This table covers the seals at the Transfer Case Input 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.

Transfer Case Intermediate Shaft

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 2.0L L4 Turbocharged 84392864
🇺🇸 US 🇨🇦 CA
4WD
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GM GENUINE Fits: 3.6L V6 19209536
🇺🇸 US 🇨🇦 CA
4WD
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This table covers the Transfer Case Intermediate shafts.

Transfer Case Intermediate Shaft Seal

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 3.6L V6 19132944
🇺🇸 US 🇨🇦 CA
4WD
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GM GENUINE Fits: 3.6L V6 19206322
🇺🇸 US 🇨🇦 CA
4WD41.16MM OD
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This table covers the seals at the Transfer Case 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.

Transfer Case Locating Pin

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 84392855
🇺🇸 US 🇨🇦 CA
4WDPin-5 Diameter X 10 Long
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This table covers the Transfer Case Locating pins.

Transfer Case Motor

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 86805253
🇺🇸 US 🇨🇦 CA
4WDLong Motor Housing
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GM GENUINE Fits: 3.6L V6 86805252
🇺🇸 US 🇨🇦 CA
4WDSHORT MOTOR HOUSING
Fitment notes — GM GENUINE 86805252
4WDSHORT MOTOR HOUSING134MM
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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.

Transfer Case Oil Drain Plug

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2021 XT6 engines 19256069
🇺🇸 US 🇨🇦 CA
Includes Seal
Fitment notes — GM GENUINE 19256069
Includes Seal
4WDM22
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This table covers the Transfer Case Oil drain plugs.

Transfer Case Output Shaft Nut

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 3.6L V6 89047861
🇺🇸 US 🇨🇦 CA
4WD
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This table covers the Transfer Case Output Shaft nuts.

Transfer Case Output Shaft Seal

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 3.6L V6 19132939
🇺🇸 US 🇨🇦 CA
Rear4WD
Fitment notes — GM GENUINE 19132939
Rear4WDRADIAL LIP DESIGN
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This table covers the seals at the Transfer Case Output 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.

Transfer Case Shift Shaft Repair Sleeve

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 3.6L V6 84785609
🇺🇸 US 🇨🇦 CA
Contains Two Rows of Teeth
Fitment notes — GM GENUINE 84785609
Contains Two Rows of Teeth
4WD
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This table covers the wear sleeves used to restore a Transfer Case Shift Shaft seal surface.

Transfer Case Vent

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 3.6L V6 19132947
🇺🇸 US 🇨🇦 CA
4WD
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This table covers the vents on the transfer case.

Buying Drivetrain Parts for a 2021 Cadillac XT6

On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.

  • Match the engine first. Some drivetrain parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
  • Read the notes on each row for position, trim and spec qualifiers before you order.
  • Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.
  • Cross-reference the manufacturer part number against your old part or a service-manual listing.

Start with the largest groups on this page: CV Axle and Transfer Case Fluid .

Frequently Asked Questions

How many drivetrain parts fit the 2021 Cadillac XT6?

Our catalog currently lists 96 drivetrain parts for the 2021 Cadillac XT6 across 37 subcategories and 10 brands, covering both the 2.0L L4 Turbocharged and the 3.6L V6. Each part is matched to the engine(s) it fits.

Do drivetrain parts differ between 2021 Cadillac XT6 engines?

Some do. 58 parts fit every engine; the other 38 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.

What are the signs of drivetrain problems on a 2021 Cadillac XT6?

Common symptoms include clicking in tight turns, a clunk when shifting between drive and reverse, vibration that builds with speed, or gear oil on the inside of a wheel. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.

What should I replace at the same time?

Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.

What do the market flags (US, CA, MX) on each part mean?

They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Cadillac XT6 was originally sold in the US, the safest choice is a part marked for the US market.

How do I make sure a part fits my 2021 Cadillac XT6?

First match the engine — each row shows which engine(s) the part fits. Then a torn CV boot caught early is a cheap boot kit; caught late it is a whole axle — inspect before deciding which to buy. The notes column carries position and trim qualifiers where they apply.

Other Parts for the 2021 Cadillac XT6

Drivetrain Parts for Other Cadillac XT6 Years

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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.