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Replacement and OEM Parts for 2021 GMC Sierra 3500 HD Ignition, Distributors & ECM

2021 GMC Sierra 3500 HD Ignition, Distributors & ECM

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2021 GMC Sierra 3500 HD
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Engine & Drivetrain

17 products about 2021 GMC Sierra 3500 HD Ignition, Distributors & ECM found

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  • OEM 2021 GMC Sierra 3500 HD Knock Sensor Diagram - 12623730
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    OEM (Genuine) 2021 GMC Sierra 3500 HD Knock Sensor

    PartNumber: 12623730
    OEM 2021 GMC Sierra 3500 HD Knock Sensor - 12623730
    Product Specifications
    • Other Names: Knock Sensor
    • Item Dimensions: 2.7 x 2.4 x 1.2 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12570125
    • Part Description: 2021 GMC Sierra 3500 HD Knock Sensor
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $13.42 MSRP: $25.30
    You Save: $11.88 (47%)
  • OEM 2021 GMC Sierra 3500 HD Ignition Coil Diagram - 12619161
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    OEM (Genuine) 2021 GMC Sierra 3500 HD Ignition Coil

    PartNumber: 12619161
    OEM 2021 GMC Sierra 3500 HD Ignition Coil - 12619161
    Product Specifications
    • Other Names: Ignition Coil
    • Item Dimensions: 6.2 x 3.1 x 3.1 inches
    • Item Weight: 0.80 Pounds
    • Fitment Type: Direct Replacement
    • Replaced by: 12713668
    • Part Description: 2021 GMC Sierra 3500 HD Ignition Coil
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $27.63 MSRP: $52.16
    You Save: $24.53 (48%)
  • Spectra Premium Ignition Coil for 2021 GMC Sierra 3500 HD - C-868

    Spectra Premium® Ignition Coil for 2021 GMC Sierra 3500 HD

    PartNumber: C-868
    Product Specifications
    • Notes: Coil on plug; Square coil
    • UPC: 627785021763
    • Part Description: 2021 GMC Sierra 3500 HD Ignition Coil
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | All Trims | 8 Cyl 6.6L
    $34.41
  • OEM 2021 GMC Sierra 3500 HD Ignition Coil Diagram - 12699383
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    OEM (Genuine) 2021 GMC Sierra 3500 HD Ignition Coil

    PartNumber: 12699383
    OEM 2021 GMC Sierra 3500 HD Ignition Coil - 12699383
    Product Specifications
    • Other Names: Ignition Coil
    • Item Dimensions: 4.9 x 2.9 x 2.0 inches
    • Item Weight: 0.80 Pounds
    • Replaced by: 12726023
    • Part Description: 2021 GMC Sierra 3500 HD Ignition Coil
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $83.90 MSRP: $158.33
    You Save: $74.43 (48%)
  • OEM 2021 GMC Sierra 3500 HD ECM Diagram - 12711867
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    OEM (Genuine) 2021 GMC Sierra 3500 HD ECM

    PartNumber: 12711867
    OEM 2021 GMC Sierra 3500 HD ECM - 12711867
    Product Specifications
    • Other Names: ECM
    • Fitment Type: Direct Replacement
    • Replaced by: 12725133
    • Part Description: 2021 GMC Sierra 3500 HD ECM
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $241.57 MSRP: $399.85
    You Save: $158.28 (40%)
  • OEM 2021 GMC Sierra 3500 HD ECM Diagram - 12711867
    View Related Parts

    OEM (Genuine) 2021 GMC Sierra 3500 HD ECM

    PartNumber: 12711867
    OEM 2021 GMC Sierra 3500 HD ECM - 12711867
    Product Specifications
    • Other Names: ECM
    • Fitment Type: Direct Replacement
    • Replaced by: 12725133
    • Part Description: 2021 GMC Sierra 3500 HD ECM
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $241.57 MSRP: $399.85
    You Save: $158.28 (40%)
  • OEM 2021 GMC Sierra 3500 HD Knock Sensor Diagram - 12623095
    View Related Parts

    OEM (Genuine) 2021 GMC Sierra 3500 HD Knock Sensor

    PartNumber: 12623095
    OEM 2021 GMC Sierra 3500 HD Knock Sensor - 12623095
    Product Specifications
    • Notes: 6.6 Liter Gas
    • Other Names: Knock Sensor
    • Item Dimensions: 2.7 x 2.5 x 1.2 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Knock Sensor
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L GAS
    $22.25 MSRP: $42.02
    You Save: $19.77 (48%)
  • OEM 2021 GMC Sierra 3500 HD Ignition Coil Diagram - 12708496
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    OEM (Genuine) 2021 GMC Sierra 3500 HD Ignition Coil

    PartNumber: 12708496
    OEM 2021 GMC Sierra 3500 HD Ignition Coil - 12708496
    Product Specifications
    • Notes: 6.6 Liter Gas, Delphi; Silverado, Sierra 3500 Hd; Delphi
    • Other Names: Ignition Coil
    • Item Weight: 1.20 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12658183, 12621750, 12699383, 12674754
    • Replaced by: 12726023
    • Part Description: 2021 GMC Sierra 3500 HD Ignition Coil
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $75.35 MSRP: $158.33
    You Save: $82.98 (53%)
  • OEM 2021 GMC Sierra 3500 HD Ignition Lock Diagram - 84990323
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    OEM (Genuine) 2021 GMC Sierra 3500 HD Ignition Lock

    PartNumber: 84990323
    OEM 2021 GMC Sierra 3500 HD Ignition Lock - 84990323
    Product Specifications
    • Notes: W/O Keyless Start
    • Other Names: Ignition Lock
    • Fitment Type: Direct Replacement
    • Replaces: 84600644, 84488467, 84647451
    • Part Description: 2021 GMC Sierra 3500 HD Ignition Lock
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | Base, SLE | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $63.45 MSRP: $119.74
    You Save: $56.29 (48%)
  • OEM 2021 GMC Sierra 3500 HD Power Switch Diagram - 84793221
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    OEM (Genuine) 2021 GMC Sierra 3500 HD Power Switch

    PartNumber: 84793221
    OEM 2021 GMC Sierra 3500 HD Power Switch - 84793221
    Product Specifications
    • Other Names: Ignition Switch, Power Switch, Start Button
    • Fitment Type: Direct Replacement
    • Replaced by: 86550151
    • Part Description: 2021 GMC Sierra 3500 HD Power Switch
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $30.59 MSRP: $57.74
    You Save: $27.15 (48%)
  • OEM 2021 GMC Sierra 3500 HD Ignition Switch Diagram - 39179435
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    OEM (Genuine) 2021 GMC Sierra 3500 HD Ignition Switch

    PartNumber: 39179435
    OEM 2021 GMC Sierra 3500 HD Ignition Switch - 39179435
    Product Specifications
    • Notes: W/O Keyless Start; Silverado, Sierra 3500 Hd
    • Other Names: Ignition Switch
    • Item Dimensions: 3.2 x 2.2 x 1.3 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Ignition Switch
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $20.66 MSRP: $42.10
    You Save: $21.44 (51%)
  • OEM 2021 GMC Sierra 3500 HD Ignition Coil Diagram - 12713668
    View Related Parts

    OEM (Genuine) 2021 GMC Sierra 3500 HD Ignition Coil

    PartNumber: 12713668
    OEM 2021 GMC Sierra 3500 HD Ignition Coil - 12713668
    Product Specifications
    • Notes: 6.6 Liter Gas, Melco; Silverado, Sierra 3500 Hd; Melco
    • Other Names: Ignition Coil
    • Replaces: 12619161, 12669351
    • Part Description: 2021 GMC Sierra 3500 HD Ignition Coil
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $28.81 MSRP: $52.16
    You Save: $23.35 (45%)
  • OEM 2021 GMC Sierra 3500 HD Glow Plug Diagram - 12690238
    View Related Parts

    OEM (Genuine) 2021 GMC Sierra 3500 HD Glow Plug

    PartNumber: 12690238
    OEM 2021 GMC Sierra 3500 HD Glow Plug - 12690238
    Product Specifications
    • Other Names: Glow Plug
    • Item Dimensions: 6.4 x 1.4 x 1.1 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaced by: 12725202
    • Part Description: 2021 GMC Sierra 3500 HD Glow Plug
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $22.59 MSRP: $40.90
    You Save: $18.31 (45%)
  • OEM 2021 GMC Sierra 3500 HD MODULE ASM-ENG CONT (W/ 2ND MPU) Diagram - 12711509
    View Related Parts

    OEM (Genuine) 2021 GMC Sierra 3500 HD MODULE ASM-ENG CONT (W/ 2ND MPU)

    PartNumber: 12711509
    OEM 2021 GMC Sierra 3500 HD MODULE ASM-ENG CONT (W/ 2ND MPU) - 12711509
    Product Specifications
    • Other Names: ECM
    • Fitment Type: Direct Replacement
    • Replaced by: 12720006
    • Part Description: 2021 GMC Sierra 3500 HD MODULE ASM-ENG CONT (W/ 2ND MPU)
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
    $423.18 MSRP: $798.48
    You Save: $375.30 (48%)
  • OEM 2021 GMC Sierra 3500 HD MODULE ASM-ENG CONT (W/ 2ND MPU) Diagram - 12711509
    View Related Parts

    OEM (Genuine) 2021 GMC Sierra 3500 HD MODULE ASM-ENG CONT (W/ 2ND MPU)

    PartNumber: 12711509
    OEM 2021 GMC Sierra 3500 HD MODULE ASM-ENG CONT (W/ 2ND MPU) - 12711509
    Product Specifications
    • Other Names: ECM
    • Fitment Type: Direct Replacement
    • Replaced by: 12720006
    • Part Description: 2021 GMC Sierra 3500 HD MODULE ASM-ENG CONT (W/ 2ND MPU)
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
    $423.18 MSRP: $798.48
    You Save: $375.30 (48%)
  • OEM 2021 GMC Sierra 3500 HD Ignition Cylinder Diagram - 13528553
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    OEM (Genuine) 2021 GMC Sierra 3500 HD Ignition Cylinder

    PartNumber: 13528553
    OEM 2021 GMC Sierra 3500 HD Ignition Cylinder - 13528553
    Product Specifications
    • Notes: W/O Keyless Start; Silverado, Sierra 3500 Hd
    • Item Dimensions: 3.1 x 2.0 x 1.1 inches
    • Item Weight: 1.20 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 13526234
    • Part Description: 2021 GMC Sierra 3500 HD Ignition Cylinder
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
  • OEM 2021 GMC Sierra 3500 HD Signal Switch Diagram - 84924354
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    OEM (Genuine) 2021 GMC Sierra 3500 HD Signal Switch

    PartNumber: 84924354
    OEM 2021 GMC Sierra 3500 HD Signal Switch - 84924354
    Product Specifications
    • Notes: W/O Keyless Start, W/Intelligent High Beam, W/Intelligent High Beam; W/Keyless Start, W/Intelligent High Beam, W/Intelligent High Beam; Silverado, Sierra 3500 Hd; W/Intelligent High Beam
    • Fitment Type: Direct Replacement
    • Replaces: 84566352, 84677657
    • Part Description: 2021 GMC Sierra 3500 HD Signal Switch
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS