2021 GMC SIERRA 1500 Transmission & Drivetrain

B&M 12 Bolt AAM 9.50/9.76 Differential Cover 71506

Differential Cover, 12-bolt, A356 Aircraft Grade Alloy, Black Anodized, AAM 9.50/9.76 12-bolt, Each

Part Number: BMM-71506

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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ACDelco Automatic Transmission Output Shafts 24275273

Automatic Transmission Output Shaft, 8L90, Each

Part Number: ADO-24275273

Not Yet Reviewed

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Pacific Performance Engineering Heavy-Duty Transmission Pans 128051810

Deep Transmission Pan; Brushed; 8L45/8L80/8L90; GM 2019-2025

Part Number: PPE-128051810

Not Yet Reviewed

Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

aFe Street Series 12 Bolt GM 9.5 Inch Differential Cover 46-71140A

Differential Cover, Street Series GM 9.5, 12-Bolt, Differential Cover Raw w/ Machined Fins, Kit

Part Number: AFE-46-71140A

Not Yet Reviewed

Estimated Ship Date: May 29, 2026 if ordered today

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Estimated Ship Date: May 29, 2026 if ordered today

ACDelco GM Genuine Parts Automatic Transmission Rebuild Components 24232417

Automatic Transmission Rebuild Components, GM Genuine Parts, Clutch Piston Dam, 4-5-6 Gear Location, Cadillac, Chevrolet, GMC, Hummer, Pontiac, Each

Part Number: ADO-24232417

Not Yet Reviewed

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ACDelco Gold Universal Joints 19473223

Universal Joint, Gold, Greasable, Steel, Round Plain, for Infiniti, for Nissan, Chevy, Dodge, Ford, GMC, Lincoln, Mercury, Ram, SRT, Toyota, Each

Part Number: ADO-45U0109

Not Yet Reviewed

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B&M Automatic Transmission Deep Pans for 2019-2024 SIERRA 1500, SILVERADO 1500 - 70399

Transmission Pan, Automatic, Cast Aluminum, Natural, 3.82 qt. Additional Fluid, GM, 8L90, 8L90E, Each

Part Number: BMM-70399

Not Yet Reviewed

Estimated Ship Date: May 12, 2026 if ordered today

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Estimated Ship Date: May 12, 2026 if ordered today

ACDelco Automatic Transmission Tailhousings 24287641

Automatic Transmission Tailhousings, Aluminum, Silver, Cadillac, Chevrolet, GMC, Each

Part Number: ADO-24287641

Not Yet Reviewed

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TransGo Automatic Transmission Boost Valves 6L8-BOOST-OES

Specialty Components, 6L80 Stock OE Replacement Boost Valve

Part Number: TRG-6L8BOOSTOES

Not Yet Reviewed

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ACDelco GM Genuine Parts Automatic Transmission Valve Body Separator Plates 24272467

Valve Body Separator Plates, OE Replacement, Cadillac, Chevrolet, GMC, 6L50, 6L80, 6L90, Each

Part Number: ADO-24272467

Not Yet Reviewed

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aFe Street Series 12 Bolt AAM 9.50/9.76 Differential Cover 46-71120A

Differential Covers, Street Series, AAM 9.50/9.76 12-bolt, Aluminum, Natural, Rear, Cadillac, Chevrolet, GMC, Each

Part Number: AFE-46-71120A

5.0 out of 5 stars ( 1 )

Estimated Ship Date: May 29, 2026 if ordered today

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Estimated Ship Date: May 29, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

aFe Pro Series 12 Bolt AAM 9.50/9.76 Differential Cover 46-71120B

5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Powertrax Grip Pro Traction Systems GM 9.5/9.76 Inch GT239733

GRIP PRO GM9.5"/9.76" 33SPL 3.42 & UP

Part Number: PWT-GT239733

Not Yet Reviewed

Estimated Ship Date: Jun 12, 2026 if ordered today

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Estimated Ship Date: Jun 12, 2026 if ordered today

Chevrolet Performance Automatic Transmission Filters 24236517

transmission filter

Part Number: NAL-24236517

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Aug 21, 2026 if ordered today

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Estimated Ship Date: Aug 21, 2026 if ordered today

ACDelco Automatic Transmission Case Extension Seals 24224675

Automatic Transmission Case Extension Seal, Rubber, Each

Part Number: ADO-24224675

Not Yet Reviewed

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ACDelco GM Genuine Parts Automatic Transmission Case Plugs 24226020

Automatic Transmission Case Plug, Fluid Filler Tube Plug, Buick, Cadillac, Chevrolet, GMC, Pontiac, Saturn, Each

Part Number: ADO-24226020

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Pacific Performance Engineering Heavy-Duty Transmission Pans 128051820

Deep Transmission Pan; Black; 8L45/8L80/8L90; GM 2019-2025

Part Number: PPE-128051820

Not Yet Reviewed

Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

ACDelco Carrier Bearings 23243839

Differential Bearing, Tapered Roller, Steel, Stock Replacement, GM, Each

Part Number: ADO-S1420

Not Yet Reviewed

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FTI Performance SRL-3 Series Billet Triple Clutch 3,600 Stall Torque Converter SRL90086-3

GM TORQUE CONVERTER, 8L90E TRIPLE CLUTCH 3600STALL

Part Number: FTI-SRL90086-3

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

FTI Performance SRL-3 Series Billet Triple Clutch 3,200 Stall Torque Converter SRL90082-3

Torque Converters, SRL-3 Series Billet Triple Clutch, 1.702 in. Crank Pilot Diameter, 36-spline, 9.500 in. Diameter, 8L90, Each

Part Number: FTI-SRL90082-3

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

FTI Performance SRL-3 Series Billet Triple Clutch 3,800 Stall Torque Converter SRL96391-3

GM TORQUE CONVERTER, 8L90E TRIPLE CLUTCH 3800 STALL

Part Number: FTI-SRL96391-3

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

FTI Performance SRL-3 Series Billet Triple Clutch 4,000 Stall Torque Converter SRL88082-3

GM TORQUE CONVERTER, 6L80E, 6L85E,6L90E TRIPLE CLUTCH 4000 STALL HARD HIT

Part Number: FTI-SRL88082-3

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Dorman - Automatic Transmission Pans for 2019-2021 SIERRA 1500, SILVERADO 1500, 2006-2009 STS - 265-580

Transmission Pan

Part Number: RNB-265-580

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

ACDelco GM Genuine Parts Transfer Case Replacement Parts 15665313

Transfer Case Extension Housing Bushing, Buick, Cadillac, Chevrolet, GMC, Isuzu, Oldsmobile, Saab, Each

Part Number: ADO-15665313

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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ACDelco GM Genuine Parts Automatic Transmission Rebuild Components 24243898

Automatic Transmission Rebuild Components, ACDelco GM Genuine Parts Automatic Transmission Rebuild Components, Seal Kit, Each

Part Number: ADO-24243898

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Dorman Automatic Transmission Pans 265-931

Transmission Oil Pan

Part Number: RNB-265-931

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today