GMC SIERRA 2500 HD CLASSIC Camshafts & Valvetrain Engines & Components

ACDelco GM Genuine Parts Engine Timing Covers 12633906

Timing Covers, GM Genuine Parts, One-piece, Aluminum, Natural, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Each

Part Number: ADO-12633906

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Summit Racing™ Billet Steel Timing Chain and Gear Set for Chevy LS SUM-G6646-BA

Timing Chain and Gear Set, Double Roller, Billet, 3 Bolt, 1 Cam Sensor, Adjustable, Chevrolet, LS, Set

Part Number: SUM-G6646-BA

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Factory Hydraulic Roller Lifters JB-2079

Lifter, Factory Hydraulic Roller Lifter, 0.842 in. O.D., Avanti, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab, Each

Part Number: MEL-JB-2079

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

ACDelco GM Genuine Parts Engine Valve Lifter Guides 12595365

Valve Lifter Guide, Plastic, Hydraulic Roller, Non-AFM/DOD, Chevrolet, LS, Each

Part Number: ADO-12595365

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Chevrolet Performance Replacement Timing Chains 12646387

Timing Chain, Replacement, Single Roller, Steel, Chevy, Small Block LS, Each

Part Number: NAL-12646387

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Timing Chain Sets 3-3SRH60SA

Timing Chain and Gear Set, Single Roller, Steel Cam Gear, Steel Crank Gear, Avanti, Buick, Cadillac, Chevy, GMC, Hummer, Saab, Small Block LS, Set

Part Number: MEL-3-3SRH60SA

4.04 out of 5 stars ( 23 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Rocker Arms MR-1341

Rocker Arm, Full Roller, Pedestal Mounting Style, Steel, Natural, Avanti, Buick, Cadillac, Chevy, GMC, Isuzu, Pontiac, Saab, Small Block LS, Each

Part Number: MEL-MR1341

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Factory Hydraulic Roller Lifters JB-7003

Lifter, Factory Hydraulic Roller Lifter, 0.842 in. O.D., Chevrolet, GMC, 7.4L, 8.1L, Each

Part Number: MEL-JB-7003

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Valves V1935

Valve, Exhaust, 1.550 in. Diameter, 0.313 in. Stem, 4.920 in. Length, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Pontiac, Saab, Small Block LS, Each

Part Number: MEL-V1935

4.71 out of 5 stars ( 7 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

ACDelco GM Genuine Parts Rocker Arms 12681275

Rocker Arms, GM Genuine Parts, Roller Fulcrum, Pedestal, 1.7 Ratio, Steel, Exhaust Side, Buick, Cadillac, Chevrolet, GMC, Hummer, Pontiac, Saab, Each

Part Number: ADO-12681275

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Camshaft Thrust Plates MF127

Camshaft Thrust Plate, Solid Type, Cast Iron, Avanti, Buick, Cadillac, Chevrolet, GMC, Hummer, Pontiac, Each

Part Number: MEL-MF127

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Cloyes Race Billet True Roller Timing Sets 9-3658TX3

Cloyes Race Billet True Roller Timing Sets 9-3658TX3

Timing Chain and Gears, Single Roller, Steel Sprockets, Chevy, 5.7L LS, 6.0L LS, Kit

Part Number: CLO-9-3658TX3

4.46 out of 5 stars ( 13 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

ACDelco GM Genuine Parts Camshaft Thrust Plates 12589016

Camshaft Thrust Plates, GM Genuine Parts, Solid Type, Steel, Chevrolet, Each

Part Number: ADO-12589016

3.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Timing Chain Dampener Brackets BD417-DBRKT

Timing Chain Dampener Bracket, Steel, Black, Includes Chain Damper, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saab, Small Block LS, Kit

Part Number: MEL-BD417-DBRKT

3.58 out of 5 stars ( 12 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Sealed Power Hydraulic Roller Lifters HT-2148A

Lifters, Hydraulic Roller, 0.843 in. O.D., Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab, Each

Part Number: SLP-HT2148A

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Pushrods MPR-614

Pushrod, Assembled, Steel, 5/16 in. Diameter, Ball Tips, 7.397 in. Overall Length, Avanti, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Pontiac, Each

Part Number: MEL-MPR-614

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Cloyes Heavy-Duty Timing Sets C-3220

Timing Chain Kit, Single Roller Style, Cadillac, Chevy, GMC, Hummer, Isuzu, Pontiac, Saab, V8, Kit

Part Number: CLO-C3220

4.1 out of 5 stars ( 10 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Chevrolet Performance Timing Sprockets 12556582

Timing Gear, Crank Sprocket, Chevy, Small Block LS, Each

Part Number: NAL-12556582

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Cloyes Race Billet True Roller Timing Sets 9-3658TX9

Timing Set, Single Roller, Steel Sprockets, Chevy, Set

Part Number: CLO-9-3658TX9

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

ACDelco GM Genuine Parts Hydraulic Roller Lifters 12722012

Lifters, GM Genuine Parts, Hydraulic Roller, Chevrolet, GMC, Each

Part Number: ADO-12722012

Not Yet Reviewed

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Timing Chain Sets 3-3SRH60SC

Timing Chain Set, Single Roller, 3-bolt, Steel Cam Gear and Crank Gear, Chain Damper, Buick, Cadillac, Chevy, GMC, Pontiac, Saab, Small Block LS, Set

Part Number: MEL-3-3SRH60SC

4.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

ACDelco GM Genuine Parts Hydraulic Roller Lifters 17122490

Lifter, Hydraulic Roller, 0.842 in. O.D., Chevy, Each

Part Number: ADO-HL124

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Estimated Ship Date: Monday 4/20/2026 if shipped by air

Melling Valves V2000

Valve, Intake, 2.000 in. Diameter, 0.314 in. Stem, 4.869 in. Length, Avanti, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Pontiac, Small Block LS, Each

Part Number: MEL-V2000

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air