2003 GMC SIERRA 1500 HD Parts & Accessories

Melling Timing Chain Dampeners BD417

Timing Chain Dampeners, Nylon, Direct Replacement, Chevrolet, 5.3/5.7/6.0/7.0L, LS, Each

Part Number: MEL-BD417

5.0 out of 5 stars ( 1 )

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Mr. Gasket Timing Chain Cover Gaskets 61015G

Timing Cover Gaskets, Timing Chain Cover Gaskets, Rubber, Water Pump Gaskets, Timing Cover Seal, Chevy, Small Block LS, Set

Part Number: MRG-61015G

Not Yet Reviewed

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Earl's Performance LS Steam Vent Adapters LS9805ERL

Coolant Crossover Components, LS Steam Vent Adapters, Fitting Type, Male Swivel Elbow, Dual -4 AN Outlets, Aluminum, Black Anodized, Chevy, LS, Pair

Part Number: EAR-LS9805ERL

5.0 out of 5 stars ( 3 )

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Cloyes Hex-A-Just Timing Sets 9-3158A

Cloyes Hex-A-Just Timing Sets 9-3158A

Timing Chain and Gear Set, Hex-A-Just Roller, Single Roller, Chevy, 4.8/5.3/6.0L, Set

Part Number: CLO-9-3158A

4.43 out of 5 stars ( 7 )

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Melling Timing Chain and Gear Sets TOPK-1004HV

TIMING SET WITH OIL PUMP

Part Number: MEL-TOPK-1004HV

Not Yet Reviewed

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Belltech Street Performance Shocks 10103H

Shocks and Struts, Street Performance Shocks, Stock/Lowered Ride Height, 0.00-5.00 in. Lowered, Low Gas Charge, Front, Chevy, Ford, GMC, Mazda, Each

Part Number: BEL-10103H

5.0 out of 5 stars ( 1 )

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Melling Valves V2000

Valve, Intake, OEM Replacement, 2.00 in. Diameter, .314 in. Stem, 4.869 in. Length, Chevy, Each

Part Number: MEL-V2000

5.0 out of 5 stars ( 2 )

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Air Lift LoadLifter 5000 Air Spring Kits 57250

Air Springs, Rear, Chevy, GMC, Pickup, Kit

Part Number: AIR-57250

4.0 out of 5 stars ( 2 )

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Performance Tool Torsion Bar Unloading Tools W83026

Torsion Bar Unloading Tools, Heavy-Duty, Steel, Black Finish, 7/8 in. Diameter Threaded Screw, Hex Head, Cadillac, Chevy, GMC, Hummer, Each

Part Number: WMR-W83026

4.45 out of 5 stars ( 20 )

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Fel-Pro Fuel Injector O-Ring Sets ES 70599

Fuel Injection O-Rings, Set of 4

Part Number: FEL-ES70599

3.89 out of 5 stars ( 9 )

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Continental Molded Radiator Hoses 62261

Radiator Hose, Molded, Direct Fit, Rubber, Lower, Cadillac, Chevy, GMC, 4.8, 5.3, 6.0L, Each

Part Number: CEL-62261

5.0 out of 5 stars ( 5 )

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ACDelco Third Brake Light Assemblies 19169016

Third Brake Light Assemblies, Stock Location, Red Lens, Chevrolet, GMC, Each

Part Number: ADO-19169016

4.0 out of 5 stars ( 2 )

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MechMan Elite Series Alternators 8206320B

Alternators and Generators, Elite Series Alternators, 12 V, 320 amp, Serpentine, Gloss Black, Buick, Cadillac, Chevy, GMC, Hummer, Olds, Pontiac, Each

Part Number: MEH-8206320B

Not Yet Reviewed

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Motive Gear Master Ring and Pinion Installation Kits R10RLMKT

Ring and Pinion Installation Kit, Master Kit, GM, 8.5 in., Kit

Part Number: MGR-R10RLMKT

3.57 out of 5 stars ( 7 )

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ACDelco Wiring Connectors 13585316

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

Part Number: ADO-PT2782

Not Yet Reviewed

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

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

Part Number: SUM-887830

4.13 out of 5 stars ( 30 )

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ACL Performance Race Series Rod Bearing Sets 8B663HC-010

Rod Bearings, Race Series, CT-1 Coated, Tri-Metal, .010 in., .25mm Crankshaft Undersize, Chevrolet, Small Block, LS, Set of 8

Part Number: PEB-8B663HC-010

Not Yet Reviewed

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Auburn Gear Select-A-Loc 35 Spline Differential Dana 60 545022

Differential, Auburn, Locker, Select-A-Loc, 35-Spline, Dana 60, 10-Bolt, Each

Part Number: AUB-545022

Not Yet Reviewed

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Moog Super Strength U-Joints 235

Universal Joint, Super Strength, 1344 Style, Greasable, Steel, Each

Part Number: MOG-235

4.34 out of 5 stars ( 44 )

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ACDelco Power Steering Pulleys 19421487

Power Steering Pulley, Serpentine, 6-Groove, Steel, Black, GM, Each

Part Number: ADO-19421487

Not Yet Reviewed

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AP Exhaust OE Replacement Steel 3 Inch Muffler X503

Muffler, Xlerator Performance, Steel, Aluminized, Chevy, GMC, 6.0, 8.1L, Each

Part Number: APH-X503

3.5 out of 5 stars ( 8 )

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TCI 13-Vane Billet Rotor Kits 373401

Pump Gear, 13-Vane, Billet Rotor, Automatic Transmission Pumps, GM, 4L60E, THM700-R4, Each

Part Number: TCI-373401

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

WeatherTech AVM Trim-to-Fit Floor Mats 11AVMOTHSB

Floor Mats, AVM Trim To Fit, Thermoplastic, Black, Front/Second Seat, Set of 3

Part Number: MNA-11AVMOTHSB

4.25 out of 5 stars ( 8 )

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ACDelco Fuel Pressure Regulator Vacuum Lines 17113556

Vacuum Line, Fuel Pressure Regulator Position, Rubber, Black, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Each

Part Number: ADO-17113556

5.0 out of 5 stars ( 4 )

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Mahle Original Premium Piston Ring Sets 41858CP.020

Piston Rings, Plasma-moly, 4.020 in. Bore, 1.5mm, 1.5mm, 3.0mm Thickness, 8-Cylinder, Set

Part Number: MAH-41858CP020

Not Yet Reviewed

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2003 GMC SIERRA 1500 HD Parts and Accessories