2003 GMC SIERRA 1500 HD Parts & Accessories

ACDelco V-Ribbed Serpentine Belts 88932529

Serpentine Belt, V-ribbed, 37.90 in. Length, 0.56 in.. Width, 4 Rib, Each

Part Number: ADO-4K378

Not Yet Reviewed

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PRW High Performance Mechanical Water Pumps 1434606

Water Pump, Mechanical, High-Volume, Counterclockwise, Aluminum, Natural, Buick, Cadillac, Chevrolet, GMC, Each

Part Number: PQX-1434606

3.0 out of 5 stars ( 2 )

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Pacer Performance Flexy Flares Fender Flares 52-149

Fender Flare, Synthetic Rubber, Black, 2.5 in. Flare Width, 1/4 in. Thick, 25 ft. Length Roll, Each

Part Number: PPP-52-149

Not Yet Reviewed

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ACDelco Radio Speakers 19116641

Radio Speaker, Front Side Door, Cadillac, Chevrolet, GMC, Each

Part Number: ADO-19116641

5.0 out of 5 stars ( 1 )

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ACDelco GM Genuine Parts PCV Valve Hoses 12556932

PCV Valve Hose, GM OE, Rubber, Black, Buick, Cadillac, Chevy, GMC, Each

Part Number: ADO-12556932

5.0 out of 5 stars ( 2 )

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Dorman Axle C-Clips 81050

Axle C-Clips, One kit Per Axle, Steel, GM, Assortment 1 Thick,1 thin, Kit

Part Number: RNB-81050

4.57 out of 5 stars ( 7 )

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KYB Excel-G Gas Shocks and Struts 344385

Shock Absorber / Strut, Excel-G, Twin-Tube, Gas Charged, Each

Part Number: KYB-344385

4.75 out of 5 stars ( 8 )

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Raybestos Element3 Brake Calipers FRC11021N

Brake Calipers, Element3, Stock Series, Natural Finish, Cadillac, Chevy, GMC, Hummer, Each

Part Number: AGB-FRC11021N

5.0 out of 5 stars ( 3 )

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Chevrolet Performance Expansion Plugs 9427693

Engine Expansion Plug, Brass, Buick, Cadillac, Chevy, GMC, Hummer, Oldsmobile, Pontiac, Saab, Saturn, Each

Part Number: NAL-9427693

5.0 out of 5 stars ( 4 )

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WeatherTech FloorLiner HP Floor Mats 440031IM-440612IM

WeatherTech FloorLiner HP Floor Mats 440031IM-440612IM

Floor Mats, FloorLiner HP Floor Mats, Front/Second Seat, Thermoplastic, Black, Cadillac, Chevrolet, GMC, Set

Part Number: MNA-S1094

Not Yet Reviewed

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Denso Ignition Coils 673-7108

Direct Ignition Coil, Direct Ignition Coil OE Quality

Part Number: DNP-673-7108

Not Yet Reviewed

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ACDelco A/C and Heater Actuators 89018365

HVAC Air Valve Actuator, Buick, Cadillac, Chevy, GMC, Hummer, Oldsmobile, Pontiac, Each

Part Number: ADO-15-72971

5.0 out of 5 stars ( 3 )

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Continental Replacement Tensioner Pulleys 49001

Idler Pulley, Smooth, Black Powdercoated, Each

Part Number: CEL-49001

5.0 out of 5 stars ( 1 )

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Yukon Gear & Axle Lifetime Series U-Joints YUJ799

U-Joint, Lifetime Series, Spicer 1350 Style, Steel, AMC, Buick, Cadillac, Chevy, Chrysler, Dodge, Ford, GMC, Jeep, Mercury, Olds, Pontiac, Each

Part Number: YGA-42021

Not Yet Reviewed

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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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Rough Country 2 inch Wheel Spacers with Studs 1095

Wheel Spacers, Aluminum, Natural, 2.00 in. Thick, 8 x 6.5 in., 165.10mm Bolt Circle, Will Not Fit Dually Models, Chevrolet, GMC, Ram, Pair

Part Number: ROU-1095

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 19, 2026 if ordered today

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Estimated Ship Date: Feb 19, 2026 if ordered today

Key Parts Rocker Plates 0856-302R

Rocker Panel, Passenger Side Inner, Steel, EDP Coated, Standard Cab, Chevrolet, GMC, Each

Part Number: KPT-0856-302R

Not Yet Reviewed

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Moog Replacement Pitman Arms K6654

Pitman Arm, Steel, Greasable, Chevy, GMC/Hummer, Pickup/SUV/Van, Each

Part Number: MOG-K6654

5.0 out of 5 stars ( 2 )

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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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PRW Power Harmonic Balancers 2332340

HARMONIC DAMPER, HI-PERF CHEV-GM 5.3L-6.2L, 2002-2008 Gen III/IV, Cadillac, Chev, GMC, L92 Truck and SUV, 0-Bal, 7.70" OD, Black

Part Number: PQX-2332340

Not Yet Reviewed

Estimated Ship Date: Apr 9, 2026 if ordered today

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Estimated Ship Date: Apr 9, 2026 if ordered today

Dorman Oil Cooler Lines 625-168

Oil Cooler Lines, Supply and Return, Cadillac, Chevy, GMC, Kit

Part Number: RNB-625-168

4.33 out of 5 stars ( 3 )

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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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ACDelco Air Conditioning Hoses 19418536

Tube, Condenser To Evaporator, Chevy, GMC, Cadillac, Each

Part Number: ADO-19418536

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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ACDelco Gold Universal Joint Straps 19470452

Universal Joint Strap Kit, Steel, Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, Pair

Part Number: ADO-45U0505

3.0 out of 5 stars ( 2 )

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2003 GMC SIERRA 1500 HD Parts and Accessories