2004 GMC Engine Gaskets & Seals Gaskets & Seals - Free Shipping on Orders Over $109 at Summit Racing

Mahle Original Head Gasket Sets HS54580A

Engine Gasket Sets, Original Head Gasket Sets, Chevy, GMC, 6.6L Diesel, Kit

Part Number: MAH-HS54580A

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Chevrolet Performance Valve Stem Seals 12482063

Valve Stem Seals, Black, Intake, Chevy, Small Block, LS, Set of 8

Part Number: NAL-12482063

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Mahle Original Engine Conversion Gasket Sets CS5975

Engine Gasket Sets, Original Engine Conversion Gasket Sets, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Pontiac, Saab, Small Block LS, Set

Part Number: MAH-CS5975

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Mr. Gasket Valley Cover Gaskets 61020G

Engine Valley Cover Gasket, Rubber/Aluminum, Chevy, Small Block, Gen III/IV, Each

Part Number: MRG-61020G

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Timken Engine Crankshaft Seals 3945

SEAL, Crankshaft, Front, AM General, Chevy, GMC, Hummer, Each

Part Number: TMK-3945

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Mahle Original Cylinder Head Gaskets 54582

Head Gasket, Multi-Layer Steel, GM, Duramax 6.6L Engine, Each

Part Number: MAH-54582

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Cometic MLS Head Gaskets C5751-036

Cometic MLS Head Gaskets C5751-036

Head Gasket, MLS, 4.060 in. Bore, .036 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5751-036

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Cometic MLS Head Gaskets C5489-098

Head Gasket, MLS, 4.100 in. Bore, .098 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5489-098

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Cometic MLS Head Gaskets C5317-040

Head Gasket, MLS, 4.130 in. Bore, .040 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5317-040

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Mahle Original Cylinder Head Gaskets 54585

Head Gasket, Multi-Layer Steel, .041 in. Compressed Thickness, GM, Duramax, Each

Part Number: MAH-54585

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Cometic MLS Head Gaskets C5477-036

Head Gasket, MLS, Multi-layer Stainless Steel, 4.000 in. Bore, 0.036 in. Compressed Thickness, Chevrolet, LS, Each

Part Number: CGT-C5477-036

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Cometic MLS Head Gaskets C5477-066

Head Gasket, MLS, Multi-layer Stainless Steel, 4.000 in. Bore, 0.066 in. Compressed Thickness, Chevrolet, LS, Each

Part Number: CGT-C5477-066

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

ACDelco GM Genuine Parts Engine Valve Stem Oil Seals 10212810

Engine Valve Stem Oil Seal, Intake, GM Genuine Part, Umbrella Style, Rubber, Black, Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, Each

Part Number: ADO-10212810

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Dorman Coolant Bypass Seals 56390

Coolant Bypass Seals, Rubber/Steel, LS GEN III/IV, Buick, Cadillac, Chevy, GMC, Hummer, Pontiac, Set of 4

Part Number: RNB-56390

4.75 out of 5 stars ( 8 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Fel-Pro Oil Pump Gaskets 72401

Oil Pump Gasket, O-Ring, Rubber, Each

Part Number: FEL-72401

4.69 out of 5 stars ( 13 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Fel-Pro Water Pump Gaskets 35635

Gasket, Water Pump, LS1, Each

Part Number: FEL-35635

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Cometic Valve Cover Gaskets C5170

Valve Cover Gasket, Molded Rubber Compound, Cadillac, Chevrolet, GMC, Pontiac, LS Engine, Each

Part Number: CGT-C5170

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Cometic MLS Head Gaskets C5475-045

Head Gasket, 3.910 in. Bore, .045 in. Compressed Thickness, Chevy, LS, 5.7, Each

Part Number: CGT-C5475-045

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Chevrolet Performance Oil Cooler Block-Off Gaskets 12611384

Oil Cooler Block Off Plate Gasket, GM, LS, Each

Part Number: NAL-12611384

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Mr. Gasket Transmission Pan Gaskets 51G05MRG

Transmission Pan Gasket, Rubber with Steel Core, Chevy, THM700-R4/4L60/4L60E, Each

Part Number: MRG-51G05MRG

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Fel-Pro PermaDryPlus Valve Cover Gaskets VS 50464 R

Valve Cover Gaskets, PermaDryPlus, Chevy, GMC, Isuzu, Oldsmobile, V6, Pair

Part Number: FEL-VS50464R

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

ACDelco Rear Main Seal Cover Gaskets 12555771

Gasket, Rear Main Seal Cover, One-piece, Paper, Chevy, Each

Part Number: ADO-12555771

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Fel-Pro Head Gasket Sets HSU 26269-1

Engine Gaskets, Head Set, Chevy, GMC, Hummer, 6.6L, Set

Part Number: FEL-HSU262691

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Fel-Pro Oil Pan Drain Plug Gaskets 70820

Drain Plug Gasket, AM General, Buick, Chevy, GMC, Isuzu, Oldsmobile, Pontiac. Saab, Saturn, Workhorse, Each

Part Number: FEL-70820

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Cometic MLS Head Gaskets C5475-080

.080" MLS-5 HEAD GASKET

Part Number: CGT-C5475-080

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air