2003 CHEVROLET SILVERADO 2500 HD Ignitions & Electrical - In Stock Filter Options - Vendor In Stock Filter Options

ACCEL Super Coils 140043

Ignition Coils, Coil Pack, Black/Yellow, Epoxy, Buick, Chevy, GMC, Hummer, Pontiac, LS2, LS3, LS7, Each

Part Number: ACC-140043

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Summit Racing™ 86 Series 8mm 300 Ohm Ignition Wires SUM-867830RWS

Summit Racing™ 86 Series 8mm 300 Ohm Ignition Wires SUM-867830RWS

Spark Plug Wires, 86 Series, 8mm, 300 Ohm, Red, 12" Leads, OEM Spark Plug Boots With Heat Shields Installed, LS, V8, Set

Part Number: SUM-867830RWS

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Dorman Seat Heater Switches 901-200

Seat Heater and Memory Switch, Front Left

Part Number: RNB-901-200

Not Yet Reviewed

Estimated Ship Date: Mar 12, 2026 if ordered today

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Estimated Ship Date: Mar 12, 2026 if ordered today

ICT Billet MAP Sensor Harness Adapters WAMAP30-6

Map Sensor Adapter, Convert LS Gen III Map Sensor Harness to 3-Bar Brick Style Sensor, Chevrolet, Each

Part Number: ICB-WAMAP30-6

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Summit Racing™ High-Output Ignition Coils SUM-850501-1R

Ignition Coils, Coil Pack, D585 Style, Epoxy, Round, Red, LS, V8, Chevy, Cadillac, GMC, Buick, Hummer, Isuzu, Each

Part Number: SUM-850501-1R

2.0 out of 5 stars ( 1 )

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Dorman Power Window Switches 920-020

Power Window Switch, Replacement, Driver Master Switch, With Power Folding Mirrors, 8 Button, Cadillac, Chevy, GMC, Each

Part Number: RNB-920-020

5.0 out of 5 stars ( 1 )

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Astemo Mass Air Flow Sensors MAF0081

Air Flow Sensor

Part Number: HTA-MAF0081

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Granatelli Motor Sports GM High Performance Coil Near Plug Wire Sets 28-1629-CBR

Spark Plug Wire Sets, Assembled, Solid Core, Black Ceramic Boots, Red, 8.00mm Diameter, 12 in. Length, GM, V8, Set

Part Number: GRN-28-1629-CBR

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ACDelco Spark Plug Wire Sets 19417606

Spark Plug Wire Sets, Assembled, RFI Suppression, Black, Cadillac, Chevrolet, GMC, Hummer, Set

Part Number: ADO-19417606

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MSD Street Fire Coils 5510

Ignition Coil, Street Fire, Coil Pack, Black, Buick, Chevy, GMC, Each

Part Number: MSD-5510

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Mar 5, 2026 if ordered today

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Estimated Ship Date: Mar 5, 2026 if ordered today

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MSD Street Fire Coils 55108

4.25 out of 5 stars ( 30 )

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Standard Motor Power Window Switches DWS-220

Power Window Switch, OEM, Stock Activation, Plastic, Cadillac, Chevy, GMC, Each

Part Number: SMP-DWS-220

4.67 out of 5 stars ( 12 )

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Standard Motor Glow Plug Controllers RY-1731

Glow Plug Controller, Duramax Diesel V8, 6.6L/403, Each

Part Number: SMP-RY-1731

Not Yet Reviewed

Estimated Ship Date: Mar 10, 2026 if ordered today

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Estimated Ship Date: Mar 10, 2026 if ordered today

Dorman Battery Boxes and Trays 00097

Tray, Battery, Steel, Black, Cadillac, Chevrolet, GMC, Each

Part Number: RNB-00097

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Taylor 409 Pro Race Spiro-Wound 10.4mm Spark Plug Wires 79605

Spark Plug Wires, 409 Pro Race, Spiro-Wound, 10.4mm, Blue, Stock Boots, Chevy, GMC, 4.8/5.3/6.0L, V8, Set

Part Number: TAY-79605

4.85 out of 5 stars ( 27 )

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Powermaster High-Amp Alternators 38237

Alternator, High-Amp, GM AD244 Case, 220 amps, 12 V, Serpentine Pulley, Offset Mount, Chrome, Internal Regulator, Chevrolet, GMC, Each

Part Number: PWM-38237

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Dorman Blower Motor Resistors 973-409

Blower Motor Resistor, Wiring Pigtail, Cadillac, Chevy, GMC, Each

Part Number: RNB-973-409

5.0 out of 5 stars ( 1 )

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ICT Billet Crankshaft Position Sensor Harness Adapters WACKP30-6

Adapter LS Gen IV Crankshaft Position Sensor to Gen III Harness - 6

Part Number: ICB-WACKP30-6

Not Yet Reviewed

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MechMan Elite Series Billet Alternators B8206400RD

Alternators and Generators, Elite Series Billet Alternators, 12 V, 400 amps, Red, Anodized, Buick, Cadillac, Chevrolet, GMC, Hummer, Each

Part Number: MEH-B8206400RD

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

ICT Billet Wiring Harness Extensions WEALT30-36

Wiring Pigtail, Alternator, Male and Female, 4-pin, 36 in. Long, Chevy, Each

Part Number: ICB-WEALT30-36

1.0 out of 5 stars ( 1 )

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Moroso Ultra 40 Unsleeved Custom-Fit Wire Sets 73681

Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Red, 180 Degree Boots, Chevy, Pontiac, 5.7L, Set

Part Number: MOR-73681

5.0 out of 5 stars ( 1 )

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Powermaster Street Alternators 582473

Alternator, Street, 165 Amps, Black Powdercoated Finish, Under Drive Serpentine Pulley, Cadillac, Chevy, GMC, Each

Part Number: PWM-582473

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Standard Motor Wiring Connectors HP3840

Wiring Pigtails, 2-pin, Male, Black, for use on Acura®, Buick, Cadillac, Chevy, Chrysler, Ford, GMC, Lincoln, Mercury, Mitsubishi, Olds, Pontiac, Each

Part Number: SMP-HP3840

5.0 out of 5 stars ( 2 )

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MechMan Indicator Light Harnesses H104

H104 Indicator light harness for 1996-2004 GM Truck

Part Number: MEH-H104

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Beck/Arnley Engine Coolant Temperature Sensors 158-0536

Coolant Temperature Sensor, Each

Part Number: BCK-158-0536

Not Yet Reviewed

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Clayton Machine Ignition Coil Covers LSC-01-M

Ignition Coil Cover, Aluminum, Machined, Milled Finish, Natural, Chevrolet, Pair

Part Number: CYM-LSC-01-M

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today