2003 GMC SIERRA 1500 HD Ignitions & Electrical - In Stock Filter Options - Vendor In Stock Filter Options

Moroso Ultra 40 Unsleeved Custom-Fit Wire Sets 73703

Spark Plug Wires, Ultra 40, Spiral Core, 7.0mm, Black, 180 Degree Boots, Chevy, Set

Part Number: MOR-73703

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

Dorman Battery Terminal Guards 60300

Battery Terminal Guards, Rubber, Red, Black, Top, Side Posts, Set of 4

Part Number: RNB-60300

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Dorman ABS Speed Sensors 970-011

ABS Speed Sensor, GM, Each

Part Number: RNB-970-011

4.4 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Hinson Motorsports 500 Ohm Spark Plug Wire Sets 8002

Spark Plug Wire Sets, 500 Ohm, Assembled, Spiral Core, Red Wires, 8.50mm Diameter, Buick, Chevrolet, GMC, Small Block LS, Set of 8

Part Number: HMI-8002

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Dorman Ignition Switches 924-715

Ignition Switch, Replacement, 7 Way Female Connector, Plastic, Black, Buick, Cadillac, Chevy, GMC, Hummer, Oldsmobile, Pontiac, Each

Part Number: RNB-924-715

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Denso Iridium Power Spark Plugs 5325

Spark Plug, Iridium Power, IT16, 14mm Thread, 18.00mm Reach, Tapered Seat, Universal, Each

Part Number: DNP-5325

Not Yet Reviewed

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Granatelli Motor Sports Spark Plug Wires 28-1629HTL

Granatelli Motor Sports Spark Plug Wires 28-1629HTL

Spark Plug Wire Sets, Assembled, Solid Core, Black, 8.00mm Diameter, Cadillac, Chevrolet, GMC, Hummer, Pontiac, V8, Set

Part Number: GRN-28-1629HTL

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

Summit Racing™ 88 Series 50 Ohm 8.5mm Ignition Wires SUM-887830WS

Spark Plug Wires, 88 Series, Street / Strip, 8.5mm, Black, 50 Ohm, 12" Leads, OEM Spark Plug Boots With Heat Shields Installed, LS, V8, Set

Part Number: SUM-887830WS

Not Yet Reviewed

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Moroso Ultra 40 Unsleeved Custom-Fit Wire Sets 73705

Spark Plug Wires, Ultra 40, Spiral Core, 8.65mm, Black, 180 Degree Boots, Chevy, Pontiac, 5.7L, 6.2L, Set

Part Number: MOR-73705

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

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Estimated Ship Date: Feb 27, 2026 if ordered today

Dorman 4WD Engagement Switches 901-072

Switch, 4WD Engagement, Push Button, Lighted, Plastic, Black, Cadillac, Chevy, GMC, 4WD, Each

Part Number: RNB-901-072

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Nitrous Express Nitrous Solenoid Mounting Brackets 15768

Nitrous Oxide Solenoid Mounting Bracket, Aluminum, Black, Designed To Mount On Top of GM LS Series Intake Manifolds, Chevrolet, Pontiac, Each

Part Number: NEX-15768

Not Yet Reviewed

Estimated Ship Date: Feb 17, 2026 if ordered today

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Estimated Ship Date: Feb 17, 2026 if ordered today

Autolite Single Platinum Spark Plugs AP5245

Spark Plug, Single Platinum, Platinum, 14mm Thread, 0.679 in. Reach, Tapered Seat, 5/8 in. Wrench Size, Each

Part Number: ATL-AP5245

Not Yet Reviewed

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Standard Motor Power Door Lock Switches DS-2128

Switch, Power Door Lock, Plastic, Black, Chevy, GMC, Each

Part Number: SMP-DS2128

Not Yet Reviewed

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Dorman Steering Wheel Position Sensors 601-003

Steering Wheel Position Sensor, Buick, Cadillac, Chevy, GMC, Hummer, Saab, Each

Part Number: RNB-601-003

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Granatelli Motor Sports Ignition System Combo Kits 28-1629KIT

Ignition System Combo Kit, Ignition Coils, Blue Spark Plug Wires, 8mm Wire Diameter, Buick, Cadillac, Chevrolet, GMC, Hummer, Pontiac, Kit

Part Number: GRN-28-1629KIT

Not Yet Reviewed

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Dorman Battery Hold-Downs 390-030

Battery Hold Down Clamp, Plastic, Black, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: RNB-390-030

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Beck/Arnley Crankshaft Position Sensors 180-0563

Crankshaft Position Sensors, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saab, Each

Part Number: BCK-180-0563

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Standard Motor Wiring Connectors S-575

Wiring Pigtails, 2-pin, Male, Black, for Hyundai, for Kia, Buick, Cadillac, Chevy, Dodge, Fiat, Genesis, GMC, Isuzu, Jeep, Saab, Saturn, Suzuki, Each

Part Number: SMP-S575

Not Yet Reviewed

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Delphi XS Ignition Wire Sets XS10388

Spark Plug Wire, Spiral Core, 7mm, Black, Stock Boots, Cadillac, Chevy, GMC, Hummer, Set

Part Number: DFP-XS10388

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Holstein Parts Coolant Temperature Sensors 2CTS0318

Coolant Temperature Sensor, Brass, Natural, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saturn, Each

Part Number: HLN-2CTS0318

Not Yet Reviewed

Estimated Ship Date: Today

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ACCEL ProConnect Spark Plug Wire Sets 118063

Spark Plug Wire Sets, ProConnect, Assembled, Spiral Core, Coil Pack, Straight Plug Boots, Black, Cadillac, Chevrolet, GMC, Hummer, Small Block LS, Set

Part Number: ACC-118063

Not Yet Reviewed

Estimated Ship Date: Feb 17, 2026 if ordered today

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Estimated Ship Date: Feb 17, 2026 if ordered today

Taylor ThunderVolt 8.2mm Spark Plug Wire Sets 82205

Spark Plug Wires, ThunderVolt, Spiro-Wound, 8.2mm, Red, Straight Boots, Cadillac/Chevy, GMC, 4.8/5.3/6.0L, Set

Part Number: TAY-82205

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Feb 20, 2026 if ordered today

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Estimated Ship Date: Feb 20, 2026 if ordered today

ACDelco Replacement Wiring Harness Connectors 12101857

Wiring Harness Connector, Replacement, OEM Type, Female, 2-pin, White, Each

Part Number: ADO-PT249

Not Yet Reviewed

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MechMan Elite Series Cast Alternators 8206400-RED

Alternators and Generators, Elite Series Cast Alternators, 12 V, 400 amps, Gloss Red, Serpentine, Buick, Chevrolet, GMC, Hummer, Olds, Pontiac, Each

Part Number: MEH-8206400-RED

Not Yet Reviewed

Estimated Ship Date: Feb 19, 2026 if ordered today

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Estimated Ship Date: Feb 19, 2026 if ordered today

Dorman Wiring Connectors 645-595

Wiring Pigtails, Wiring Connectors, Female, Buick, Cadillac, Chevy, GMC, Hummer, Oldsmobile, Pontiac, Saab, Saturn, Each

Part Number: RNB-645-595

Not Yet Reviewed

Estimated Ship Date: Today

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