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

Pacer Performance LED Modules 20-702

Modules, LED, Each

Part Number: PPP-20-702

4.91 out of 5 stars ( 11 )

Estimated Ship Date: Today

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Champion Copper Plus Spark Plugs 401

Spark Plug, RS12YC, Copper Plus, Tapered Seat, 14mm Thread, .708 in. Reach, Projected Tip, Resistor, Each

Part Number: CPN-401

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Today

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FAST XR Series Ignition Coils 30387-8

Ignition Coils, XR Series, Black, 50,000 Volts Max, V8, Round Truck Style, LS, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Set of 8

Part Number: FST-30387-8

Not Yet Reviewed

Estimated Ship Date: Apr 8, 2026 if ordered today

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Estimated Ship Date: Apr 8, 2026 if ordered today

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

Not Yet Reviewed

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MSD Blaster OEM Replacement Coils 8264

Ignition Coil, Blaster OEM Replacement, Buick, Cadillac, Chevy, GMC, Hummer, 4.8, 5.3, 6.0, 8.1L, Each

Part Number: MSD-8264

4.2 out of 5 stars ( 5 )

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Summit Racing™ Idle Air Control Valve and Throttle Position Sensor Bolt Kits SUM-921100

Replacement Component, IAC/TPS Mounting Hardware, Stainless, GM LS Engines, Each

Part Number: SUM-921100

5.0 out of 5 stars ( 7 )

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Eddie Motorsports Smooth Billet Coil Covers MS109-02MB

Ignition Coil Covers, Smooth, Billet Aluminum, Matte Black Powdercoated, Chevy, Pontiac, Small Block LS, Pair

Part Number: EMS-MS109-02MB

2.5 out of 5 stars ( 2 )

Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today

Taylor Street Thunder Spark Plug Wire Sets 51044

Spark Plug Wires, StreeThunder, Spiro-Wound, 8mm, Black, Straight Boots, Chevy, Small Block, Set

Part Number: TAY-51044

4.47 out of 5 stars ( 15 )

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Taylor Spiro-Pro Spark Plug Wire Sets 76646

Wire, Spiro-Pro, 8mm, Blue, Coil Pack, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Saab, Set of 8

Part Number: TAY-76646

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Autolite Double Platinum Spark Plugs PP5245

Spark Plug, Double Platinum, 14mm Thread, 0.708 in. Reach, Tapered Seat, 5/8 in. Wrench Size, Each

Part Number: ATL-APP5245

Not Yet Reviewed

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MechMan Elite Series Billet Alternators B8206370RD

MechMan Elite Series Billet Alternators B8206370RD

Alternator, E Series, 12 V, 370 amps, Billet Aluminum, Red Anodized, Serpentine, Buick, Cadillac, Chevy, GMC, Hummer, Oldsmobile, Each

Part Number: MEH-B8206370RD

5.0 out of 5 stars ( 1 )

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Standard Motor Blue Streak Performance Race Spark Plug Wire Sets 10039

Spark Plug Wires, Blue Streak Performance Race, Assembled, Spiral Core, 9mm, Black, Set

Part Number: SMP-10039

4.5 out of 5 stars ( 8 )

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Standard Motor Camshaft Position Sensors PC273K

Camshaft Position Sensor, Replacement, Buick, Cadillac, Chevrolet, GMC, Isuzu, Pontiac, Each

Part Number: SMP-PC273K

Not Yet Reviewed

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Dorman Battery Hold-Downs 00587

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

Part Number: RNB-00587

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Today

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MechMan High-Output Racing Alternators 8237320B

Alternator, Internal Regulator, 320 Amp, Black, Chevy, GMC, Each

Part Number: MEH-8237320B

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

MechMan Elite Series Cast Alternators 8206400-BLUE

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

Part Number: MEH-8206400-BLUE

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

MechMan Elite Series Cast Alternators 8206400-YELL

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

Part Number: MEH-8206400-YELL

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 Power Window Switches 901-075

Power Window Switch, Master Switch, 8 Buttons, Black/Brown, Plastic, Illuminated, Cadillac, Chevy, GMC, Each

Part Number: RNB-901-075

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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ACDelco Spark Plug Wire Sets 88862397

Spark Plug Wire Sets, Assembled, Spiral Core, Black, 7.00mm Diameter, Cadillac, Chevrolet, GMC, Hummer, V8, Set

Part Number: ADO-9748GG

3.0 out of 5 stars ( 2 )

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SCT Livewire Vision Performance Monitors 5015PWD

Computer Programmer, SCT Livewire Vision Performance Monitor, Hand-held, Each

Part Number: SCL-5015PWD

Not Yet Reviewed

Estimated Ship Date: Feb 18, 2026 if ordered today

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Estimated Ship Date: Feb 18, 2026 if ordered today

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SCT X4 Power Flash Programmers 7015

4.25 out of 5 stars ( 74 )

Estimated Ship Date: Today

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35 amps ACDelco Replacement Relay 13500126

Relays, Replacement, 35 amps, 12 V, 5 Blade Terminals, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab, Saturn, Suzuki, Each

Part Number: ADO-D1780C

5.0 out of 5 stars ( 2 )

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Dorman Headlight Switches 901-142

Headlight Switch, OEM Replacement, Chevy, GMC, Each

Part Number: RNB-901-142

5.0 out of 5 stars ( 2 )

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Dorman Knock Sensor Grommets 42003

Knock Sensor Grommet / Seal, Gen III LS Valley Cover, 2 Req'd per engine, Sold each

Part Number: RNB-42003

5.0 out of 5 stars ( 1 )

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Standard Motor Knock Sensors KS116

Knock Sensor, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Pontiac, Each

Part Number: SMP-KS116

4.33 out of 5 stars ( 3 )

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Lingenfelter Performance Engineering Mass Airflow Sensors L480000000

Mass Airflow Sensors, 100.00mm I.D., Aluminum, Black, Electronics, Chevy, Cadillac, GMC, Hummer, Pontiac, Kit

Part Number: LPE-L480000000

1.0 out of 5 stars ( 1 )

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Denso Iridium Long Life Spark Plugs 5090

Spark Plugs, Iridium Long Life, Tapered Seat, 14mm Thread, 18mm Reach, Resistor, Each

Part Number: DNP-5090

Not Yet Reviewed

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