2003 CHEVROLET SILVERADO 1500 HD Ignitions & Electrical

Alternator, GM AD230 Case Style, 12 V, 105 amps, Internal Regulator, Serpentine Pulley, Cadillac, Chevy, GMC, Each

Part Number: ADO-334-2491A

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• Core Charge $30.00

Adapter Harnesses, Holley EFI, MAP Sensor Adapter, 3-pin Delphi GT to 3-pin Delphi M/P 150 Connector, Plug-and-Play, LS Engine Harness, Each

Part Number: HLY-558-467

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Spark Plug Wires, Street / Strip Series, 8mm, 300 Ohm, Blue, 9" Leads, OEM Spark Plug Boots That Accept Heat Shields, LS, V8, Set

Part Number: SUM-867828

4.14 out of 5 stars ( 14 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Coolant Temperature Sensor, OEM, Brass, Natural, Buick, Cadillac, Chevy, GMC, Pontiac, Saab, Saturn, Each

Part Number: DFP-TS10076

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• $15 Summit Bucks on $150 spent*

Knock Sensor, Replacement, Wiring Harness, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Kit

Part Number: SMP-KS116K

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• Free Shipping

Spark Plug Wire Set, High Performance, 10mm Diameter, Coil Pack, Silicone Boot, Black, Spiral Core, 30 ohms/ft., Gray Wire, Chevy, Small Block, Set

Part Number: SCW-CH-LS-T-3

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• Free Shipping

Computer Programmer, Trinity 2 EX Performance, Buick, Cadillac, Chevy, GMC, Hummer, Pontiac, Each

Part Number: DBL-9200

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• Free Shipping

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

Part Number: SUM-850501-1B

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Wiring Connector, GM 19368859, Cadillac, CTS, Gray Plastic, Each

Part Number: ADO-PT3846

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

NTK Engine Crankshaft Position Sensor

Part Number: NGK-EH0157

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Alternators and Generators, Elite Series Cast Alternators, 12 V, 320 amps, Serpentine, 4-pin Oval Plug, Buick, Chevy, GMC, Hummer, Olds, Pontiac, Each

Part Number: MEH-8206320

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• Free Shipping

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

Part Number: SUM-867830RWS

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Sensor, MAP, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Hummer, Isuzu, Saab, Saturn, Each

Part Number: DFP-PS10000

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• $15 Summit Bucks on $150 spent*

Spark Plug Wire Set, High Performance, 10mm Diameter, Coil Pack, Silicone Boot, Black, Spiral Core, 30 ohms/ft., Orange Wire, Chevy, Small Block, Set

Part Number: SCW-CH-LS-T-5

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• Free Shipping

Spark Plug Wires, Street / Strip Series, 8mm, 300 Ohm, Blue, 9" Leads, OEM Spark Plug Boots With Heat Shields Installed, LS, V8, Set

Part Number: SUM-867828WS

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Spark Plug, Resistor, Iridium Tip, Copper Core, 14mm Thread Size, 0.708 in. Reach, Tapered Seat, Each

Part Number: ATL-XP5245

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Ignition Coil, Blaster OEM Replacement, Buick, Cadillac, Chevy, GMC, Isuzu, Hummer, Pontiac, Saab, Each

Part Number: MSD-82653

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• Free Shipping

Alternator, XS Volt, GM AD244 Style, 12/14/16V, 220 amps, Natural, Under Drive Serpentine Pulley, Each

Part Number: PWM-4823783

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

• Free Shipping

Spark Plug Wires, ThunderVolt, Spiro-Wound, 8.2mm, Red, 180 Degree Boots, Cadillac/Chevy, Pontiac, LS, Set

Part Number: TAY-84244

4.72 out of 5 stars ( 18 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Ignition Coil Wiring Harness, Each

Part Number: ADO-356G

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Starter Bolts, Steel, Zinc, Long and Short Bolts, Chevy, LS, Set of 3

Part Number: MRG-60942MRG

2.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Harness Adapter, Each

Part Number: CEI-108103

4.53 out of 5 stars ( 17 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Coolant Temperature Sensor, Each

Part Number: SMP-TX89

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Modules, LED, Each

Part Number: PPP-20-702

4.91 out of 5 stars ( 11 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Spark Plug, Laser Platimun, Projected Tip, 14mm Thread, 0.708 in. Reach, Tapered Seat, Each

Part Number: NGK-3784

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air