2003 GMC SIERRA 1500 HD Parts & Accessories

Hedman Street Headers 69696

Hedman Street Headers 69696

Headers, Street, Shorty, Steel, Silver Ceramic Coated, Cadillac, Chevy, GMC, Hummer, Small Block LS, Pair

Part Number: HED-69696

3.89 out of 5 stars ( 9 )

Estimated Ship Date: Today

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Melling Pushrods MPR-614

Pushrod, Steel, 5/16 in. Diameter, 7.397 in. Length, Ball Ends, Each

Part Number: MEL-MPR-614

4.25 out of 5 stars ( 4 )

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PRW Main Cap Stud Kits 1000098

Main Cap Fasteners, Main Cap Girdle Stud Kits, 6-bolt, Stud Style, 12-Point Head, Nuts, Chevy LS, Kit

Part Number: PQX-1000098

3.75 out of 5 stars ( 4 )

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Melling Oil Galley Barbell Plugs MOGP-100

Oil Galley Plug, Nylon, White, Chevrolet, Small Block Gen III/IV, LS, Each

Part Number: MEL-MOGP-100

5.0 out of 5 stars ( 3 )

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Go Rhino Bed Bars 9009560SSB

Roll Bar, Truck Bed Mount, Steel, Black Powdercoated, Chevy, Dodge, Ford, GMC, Ram, Toyota, Kit

Part Number: GRH-9009560SSB

2.5 out of 5 stars ( 2 )

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Moog Replacement Idler Arms K6535HD

Idler Arm, Replacement, Chevy, GMC, Hummer, Each

Part Number: MOG-K6535HD

4.22 out of 5 stars ( 9 )

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Performance Tool Harmonic Balancer Pullers W89712

Harmonic Balancer Puller, Compact Harmonic Balancer Puller, Steel, Black, 3-Jaw Puller, Forcing Screw/Rods, with Case, Kit

Part Number: WMR-W89712

3.41 out of 5 stars ( 44 )

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OEM Automotive Tools Harmonic Balancer Puller Sets 25090

4.75 out of 5 stars ( 31 )

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Mr. Gasket Rear Main Seal Installation Tools LSRC1

Alignment Tool, Installs Rear Main Seal, Chevy, LS, Each

Part Number: MRG-LSRC1

4.67 out of 5 stars ( 15 )

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E3 Spark Plugs E3.54

Spark Plug, E3, Tapered Seat, 14mm Thread, 0.708 in. Reach, Projected Tip, Resistor, Each

Part Number: ETP-E3-54

4.59 out of 5 stars ( 98 )

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King XP-Series Main Bearings MB5777XP

Main Bearings, XP-Series, Performance, Tri-Metal, Dart LS Next, Set of 5

Part Number: KGB-MB5777XP

Not Yet Reviewed

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Taylor Spiro-Pro Spark Plug Wire Sets 76246

Spark Plug Wires, Spiro-Pro, Assembled, 8mm, Spiral Core, Red, 11.750 in. Long, Chevy, GMC, Small Block, Set

Part Number: TAY-76246

4.62 out of 5 stars ( 21 )

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S&B Filters Dry Filter Cold Air Intake Kits 75-5157D

Cold Air Intake, Black Plastic Tube, White Paper Filter, Cadillac, Chevrolet, GMC, Kit

Part Number: SBF-75-5157D

Not Yet Reviewed

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13.5 Inch 4,600 CFM Flex-A-Lite Direct-Fit Electric Fan 105398

Electric Fan, Dual, 13 1/2 in. Diameter, Puller, 4,600 cfm, Black, Plastic, Chevy, GMC, Each

Part Number: FLX-105398

4.33 out of 5 stars ( 3 )

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ACL Performance Race Series Main Bearing Sets 5M7298H-01

Main Bearings, Race Series, Tri-Metal, 3/4 Groove, .001 in. Crankshaft Undersize, Chevrolet, LS, Set of 5

Part Number: PEB-5M7298H-01

Not Yet Reviewed

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Melling Timing Chain Sets 3-3SRH60SC

Timing Chain and Gear Sets, Single Roller, 3-bolt, Steel Cam Gear, Steel Crank Gear, Chain Damper, Buick, Cadillac, Chevy, GMC, Pontiac, V8, Set

Part Number: MEL-3-3SRH60SC

4.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Mahle Original Timing Cover Gaskets JV5022

Gasket, Timing Cover, Rubber, GM, LS, Each

Part Number: MAH-JV5022

5.0 out of 5 stars ( 4 )

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Agility Auto Parts Radiators 8012423

Radiator, 1-row, Aluminum/Plastic, Natural, Transmission Cooler, Cadillac, Chevrolet, GMC, Each

Part Number: RDR-8012423

4.75 out of 5 stars ( 4 )

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ACCEL Super Coils 140043-8

Ignition Coils, Coil Pack, Black/Yellow, Epoxy, Buick, Chevy, GMC, Hummer, Pontiac, LS2, LS3, LS7, Set of 8

Part Number: ACC-140043-8

4.35 out of 5 stars ( 20 )

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Belltech Rear Shackle Kits 6404

Rear Shackle Kit, 1/2 in. Raised Ride Height, 2.5 in. Spring Width, Chevy, GMC/Ford/Dodge, Pair

Part Number: BEL-6404

4.38 out of 5 stars ( 13 )

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aFe Momentum GT Pro 5R Air Intake Systems 54-74101

Air Intake Kit, Momentum GT Pro 5R, Polyethylene Tube, Black, Cotton Gauze Filter, Blue, Cadillac, Chevy, GMC, 4.8L, 5.3L, 6.0L, Kit

Part Number: AFE-54-74101

5.0 out of 5 stars ( 2 )

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Clevite AL-Series Rod Bearings CB1776A(8)

Rod Bearings, Direct Replacement, AL-5, Set of 8

Part Number: CLE-CB1776A8

5.0 out of 5 stars ( 2 )

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ATI Super Damper Supercharged Series Harmonic Balancers ATI917285

Harmonic Balancer, Supercharger Super Damper, Internal Balance, Steel, Black, Chevy, GMC, Small Block LS, Each

Part Number: ATI-917285

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

RoadActive Suspension Systems 4611

Helper Spring, Chevy, GMC, Rear, Black Powdercoated, Kit

Part Number: RAS-4611

4.94 out of 5 stars ( 16 )

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Lokar Hi-Tech Flexible Braided Stainless Transmission Dipsticks TD-34L80FM36

Transmission Dipstick, Braided Stainless Steel, Natural, Firewall Mount, 36 in. Length, 4L80E, Each

Part Number: LOK-TD34L80FM36

3.8 out of 5 stars ( 5 )

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Earl's Performance Power Steering Adapter Fittings 961961ERL

Fittings, Power Steering Adapter, Straight, Steel, Zinc Plated, -6 AN Male, 3/4 in.-16 UNF-2A, for use on Holley Power Steering Pumps, Each

Part Number: EAR-961961ERL

3.89 out of 5 stars ( 19 )

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2003 GMC SIERRA 1500 HD Parts and Accessories