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Replacement and OEM Parts for 2021 GMC Sierra 3500 HD Crankshafts, Pistons, Rings & Connecting Rods

2021 GMC Sierra 3500 HD Crankshafts, Pistons, Rings & Connecting Rods

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2021 GMC Sierra 3500 HD
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Engine & Drivetrain

19 products about 2021 GMC Sierra 3500 HD Crankshafts, Pistons, Rings & Connecting Rods found

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  • OEM (Genuine) 2021 GMC Sierra 3500 HD Front Cover Seal

    PartNumber: 12634614
    OEM 2021 GMC Sierra 3500 HD Front Cover Seal - 12634614
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd; 6.6 Liter Gas
    • Item Dimensions: 3.6 x 3.5 x 0.5 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12693255
    • Part Description: 2021 GMC Sierra 3500 HD Front Cover Seal
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $11.60 MSRP: $18.40
    You Save: $6.80 (37%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Bearings

    PartNumber: 12683811
    OEM 2021 GMC Sierra 3500 HD Bearings - 12683811
    Product Specifications
    • Other Names: Bearing, Connecting Rod Bearing
    • Item Dimensions: 4.3 x 4.1 x 2.1 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12673962
    • Part Description: 2021 GMC Sierra 3500 HD Bearings
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $9.71 MSRP: $12.12
    You Save: $2.41 (20%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Rear Cover Gasket

    PartNumber: 12627520
    OEM 2021 GMC Sierra 3500 HD Rear Cover Gasket - 12627520
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd
    • Other Names: Rear Cover Gasket, Rear Main Seal Gasket
    • Item Dimensions: 5.8 x 2.9 x 0.5 inches
    • Item Weight: 0.30 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Rear Cover Gasket
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $6.79 MSRP: $10.78
    You Save: $3.99 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Rear Main Seal

    PartNumber: 97209342
    OEM 2021 GMC Sierra 3500 HD Rear Main Seal - 97209342
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd
    • Other Names: Rear Main Seal
    • Item Dimensions: 6.3 x 6.3 x 1.0 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Rear Main Seal
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
    $45.91 MSRP: $75.99
    You Save: $30.08 (40%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Piston

    PartNumber: 12693468
    OEM 2021 GMC Sierra 3500 HD Piston - 12693468
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd
    • Other Names: Piston
    • Item Dimensions: 5.8 x 5.4 x 2.8 inches
    • Item Weight: 3.30 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Piston
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
    $132.53 MSRP: $210.45
    You Save: $77.92 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Rear Main Seal Retainer

    PartNumber: 12680282
    OEM 2021 GMC Sierra 3500 HD Rear Main Seal Retainer - 12680282
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd
    • Other Names: Rear Main Seal Retainer
    • Item Dimensions: 22.6 x 21.9 x 5.6 inches
    • Item Weight: 12.10 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Rear Main Seal Retainer
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
    $216.21 MSRP: $357.85
    You Save: $141.64 (40%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Piston Rings

    PartNumber: 12661872
    OEM 2021 GMC Sierra 3500 HD Piston Rings - 12661872
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd; Oversized 0.5mm
    • Other Names: Piston Rings
    • Item Dimensions: 5.3 x 5.2 x 1.1 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Piston Rings
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $89.45 MSRP: $142.03
    You Save: $52.58 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Piston

    PartNumber: 12699528
    OEM 2021 GMC Sierra 3500 HD Piston - 12699528
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd; Oversized 0.5mm; Right
    • Other Names: Piston
    • Item Dimensions: 4.8 x 4.3 x 4.4 inches
    • Item Weight: 1.40 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Piston
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $76.10 MSRP: $120.85
    You Save: $44.75 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Piston

    PartNumber: 12699530
    OEM 2021 GMC Sierra 3500 HD Piston - 12699530
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd; Oversized 0.5mm; Left
    • Other Names: Piston
    • Item Dimensions: 4.8 x 4.3 x 4.4 inches
    • Item Weight: 1.40 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Piston
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $76.10 MSRP: $120.85
    You Save: $44.75 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Rear Main Seal

    PartNumber: 12665076
    OEM 2021 GMC Sierra 3500 HD Rear Main Seal - 12665076
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd
    • Other Names: Rear Main Seal
    • Item Dimensions: 5.2 x 5.4 x 4.9 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12634615, 12693212
    • Part Description: 2021 GMC Sierra 3500 HD Rear Main Seal
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $25.78 MSRP: $40.94
    You Save: $15.16 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Rear Main Seal Retainer

    PartNumber: 12705664
    OEM 2021 GMC Sierra 3500 HD Rear Main Seal Retainer - 12705664
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd
    • Other Names: Rear Cover, Rear Main Seal Retainer
    • Item Dimensions: 13.6 x 12.5 x 3.4 inches
    • Item Weight: 2.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12691913, 12693214
    • Part Description: 2021 GMC Sierra 3500 HD Rear Main Seal Retainer
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $64.75 MSRP: $102.80
    You Save: $38.05 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Bearings

    PartNumber: 12677680
    OEM 2021 GMC Sierra 3500 HD Bearings - 12677680
    Product Specifications
    • Other Names: Bearing
    • Item Dimensions: 4.2 x 4.2 x 4.2 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Replaced by: 12704537
    • Part Description: 2021 GMC Sierra 3500 HD Bearings
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
    $51.30 MSRP: $81.46
    You Save: $30.16 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Piston

    PartNumber: 12699527
    OEM 2021 GMC Sierra 3500 HD Piston - 12699527
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd; Standard; Right
    • Other Names: Piston
    • Item Dimensions: 5.0 x 4.4 x 4.5 inches
    • Item Weight: 1.40 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Piston
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $59.64 MSRP: $94.69
    You Save: $35.05 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Piston

    PartNumber: 12699529
    OEM 2021 GMC Sierra 3500 HD Piston - 12699529
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd; Standard; Left
    • Other Names: Piston
    • Item Dimensions: 4.9 x 4.3 x 4.3 inches
    • Item Weight: 1.40 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Piston
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $26.83 MSRP: $42.61
    You Save: $15.78 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Pulley

    PartNumber: 12692644
    OEM 2021 GMC Sierra 3500 HD Pulley - 12692644
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd; 6.6 Liter Diesel, Upper Components
    • Other Names: Crankshaft Pulley, Pulley
    • Item Dimensions: 9.1 x 8.7 x 3.4 inches
    • Item Weight: 4.70 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Pulley
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
    $31.05 MSRP: $51.40
    You Save: $20.35 (40%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Bearings

    PartNumber: 12685817
    OEM 2021 GMC Sierra 3500 HD Bearings - 12685817
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd
    • Other Names: Bearing
    • Item Dimensions: 4.2 x 4.2 x 2.2 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Bearings
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
    $9.34 MSRP: $14.81
    You Save: $5.47 (37%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Bearing Kit-Crankshaft

    PartNumber: 12682028
    OEM 2021 GMC Sierra 3500 HD Bearing Kit-Crankshaft - 12682028
    Product Specifications
    • Other Names: Bearing, Bearing Set, Main Bearings
    • Item Dimensions: 6.9 x 4.5 x 4.5 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Replaced by: 12729655
    • Part Description: 2021 GMC Sierra 3500 HD Bearing Kit-Crankshaft
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $43.48 MSRP: $75.68
    You Save: $32.20 (43%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Vibration Damper

    PartNumber: 12680364
    OEM 2021 GMC Sierra 3500 HD Vibration Damper - 12680364
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd; 6.6 Liter Gas
    • Other Names: Crankshaft Pulley, Vibration Damper
    • Item Dimensions: 9.1 x 8.1 x 6.2 inches
    • Item Weight: 12.10 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Vibration Damper
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Ring Kit-Piston (Std Size)

    PartNumber: 12661871
    OEM 2021 GMC Sierra 3500 HD Ring Kit-Piston (Std Size) - 12661871
    Product Specifications
    • Notes: Silverado, Sierra 3500 Hd; Standard
    • Other Names: Piston Rings
    • Item Dimensions: 5.2 x 5.3 x 1.0 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Ring Kit-Piston (Std Size)
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS