2003 GMC SIERRA-1500-HD Ignitions & Electrical

Spark Plug, IZTR5B11, Laser Iridium, 14mm Thread, 0.708 in. Reach, Tapered Seat, 5/8 in. Hex, Each

Part Number: NGK-1465

4.84 out of 5 stars ( 25 )

Estimated Ship Date: Today

Spark Plugs, Ruthenium HX, Platinum, Resistor, 14mm Thread Size, 0.708 in. Reach, Tapered Seat, Each

Part Number: NGK-94567

5.0 out of 5 stars ( 9 )

Estimated Ship Date: Today

Starter Bolts, Steel, Zinc, Long Bolts, Chevrolet, LS, Pair

Part Number: MRG-60941MRG

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Coolant Temperature Sensor, Each

Part Number: SMP-TX89

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

Throttle Body Replacement Components, LS Idle Air Control Valve and Throttle Position Sensor Bolt Kits, Mounting Hardware, Chevrolet, GMC, LS, Kit

Part Number: ICB-551722

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

Modules, LED, Each

Part Number: PPP-20-702

4.9 out of 5 stars ( 10 )

Estimated Ship Date: Today

Relay, Multi Purpose, High Power, General, 8386, Each

Part Number: ADO-13500114

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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 )

Estimated Ship Date: Today

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 )

Estimated Ship Date: Today

Ground Strap, Body Electrical, 17.490 in. Length, Cadillac, Chevrolet, GMC, Truck, Each

Part Number: ADO-15179982

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Wiring Harness Connector, Replacement, Multipurpose, Male, 2-pin, Gray, Each

Part Number: ADO-PT209

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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

Sensor, ABS Wheel Speed Sensor, Replacement, Each

Part Number: HLN-2ABS1547

Not Yet Reviewed

Estimated Ship Date: Today

SCT BDX Magnetic Window Mount, Each

Part Number: SCL-30490

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Wiring Pigtails, Replacement, Female Wire Connector Type, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab, Each

Part Number: ADO-PT308

Not Yet Reviewed

Estimated Ship Date: Today

Switch - Misc.

Part Number: SMP-FLS14

Not Yet Reviewed

Estimated Ship Date: Today

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

Part Number: ADO-PT249

Not Yet Reviewed

Estimated Ship Date: Today

Multi Purpose Wire Connector

Part Number: ADO-PT2712

Not Yet Reviewed

Estimated Ship Date: Today

Mount, Pod Adapters, Livewire TS+, Each

Part Number: SCL-30604

Not Yet Reviewed

Estimated Ship Date: Sep 29, 2025 if ordered today

• Drop Ship
• Special Order

Wiring Connectors, Mass Air Flow Sensor Connector, Male, 10 in. Length, For Use on Acura®, Avanti, Buick,Chevy, Each

Part Number: SMP-HP4240

Not Yet Reviewed

Estimated Ship Date: Today

A/C Clutch Cycle Switch

Part Number: UAC-SW10082C

Not Yet Reviewed

Estimated Ship Date: Today

Speed Sensors, OEM Replacement, Each

Part Number: SMP-SC130

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Automatic Headlight Sensor

Part Number: SMP-EFL166

Not Yet Reviewed

Estimated Ship Date: Oct 1, 2025 if ordered today

• Drop Ship
• Special Order

Multi Purpose Relay, Relays

Part Number: HLA-933332591

Not Yet Reviewed

Estimated Ship Date: Nov 7, 2025 if ordered today

• Drop Ship
• Special Order

Multi-Function Relay

Part Number: SMP-RY-1757

Not Yet Reviewed

Estimated Ship Date: Oct 1, 2025 if ordered today

• Drop Ship
• Special Order