2004 GMC SIERRA 2500 HD Gaskets & Seals

Oil Pan Gasket, One-piece, Silicone/Aluminum, Chevy, Small Block LS, Each

Part Number: ADO-12612350

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Head Gasket, MLS, 4.020 in. Bore, .051 in. Compressed Thickness, Chevy, Small Block, LS2/LS6, Each

Part Number: NAL-12589227

4.8 out of 5 stars ( 20 )

Estimated Ship Date: Today

Intake Manifold Gaskets, Original, Stock Port, Molded Rubber Compound, Chevy, 4.8L, 5.3L, 6.0L, Kit

Part Number: MAH-MIS16340

4.71 out of 5 stars ( 14 )

Estimated Ship Date: Today

Timing Cover Gaskets, Victo-Tech Rubber, Chevy, GMC, Small Block LS, Kit

Part Number: MAH-JV5158

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Intake Manifold Gaskets, PermaDryPlus, Stock Port, Chevy, LS, Set

Part Number: FEL-MS98016T

4.92 out of 5 stars ( 53 )

Estimated Ship Date: Today

Intake Manifold Gaskets, Replacement, Cathedral Port Style, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Saab, Workhorse, V8, Pair

Part Number: FEL-MS96587

4.43 out of 5 stars ( 7 )

Estimated Ship Date: Today

Gaskets, Intake Manifold, Chevy, Pair

Part Number: MAH-MS16340

5.0 out of 5 stars ( 13 )

Estimated Ship Date: Today

Head Gasket, Multi-Layer Steel, Replacement, Grade C, GM, 6.6L Duramax, Passenger Side, Each

Part Number: NAL-12637788

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Intake Manifold Gaskets, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Saab, Pair

Part Number: ADO-89060413

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

Transmission Pan Gaskets, GM OE, Chevrolet, GMC, Each

Part Number: ADO-8677743

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Head Gasket, Multi-Layer Steel, Replacement, 1.05mm Thickness, Grade C, GM, 6.6L Duramax, Driver Side, Each

Part Number: NAL-12637785

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Transmission Pan Gaskets, GM OE, Chevrolet, GMC, Each

Part Number: ADO-29549684

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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

Estimated Ship Date: Today

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: Today

EXHAUST GASKET SET

Part Number: CGT-C15547

Not Yet Reviewed

Estimated Ship Date: Today

Rear Main Seals, Rear Crankshaft Oil Seals, One-piece, Chevrolet, GMC, 6.6L Diesel, Each

Part Number: ADO-97209342

Not Yet Reviewed

Estimated Ship Date: Today

.040" MLS- RH SIDE HEAD GASKET

Part Number: CGT-C5761-040

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

.040" MLS- LH SIDE HEAD GASKET

Part Number: CGT-C5764-040

Not Yet Reviewed

Estimated Ship Date: Today

Timing Cover Seal, Front Crankshaft Seal, Gasket, O-Rings, Chevrolet, GMC, 6.6L, Duramax, Kit

Part Number: FEL-TCS45055

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

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Head Gasket, MLS, Marine, 4.350 in. Bore, .040 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5765-040

Not Yet Reviewed

Estimated Ship Date: Apr 8, 2026 if ordered today

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• Special Order

.027" MLS- LH SIDE HEAD GASKET

Part Number: CGT-C5764-027

Not Yet Reviewed

Estimated Ship Date: Apr 8, 2026 if ordered today

• Drop Ship
• Special Order

.027" MLS- RH SIDE HEAD GASKET

Part Number: CGT-C5761-027

Not Yet Reviewed

Estimated Ship Date: Apr 8, 2026 if ordered today

• Drop Ship
• Special Order

Head Gasket, MLS, Marine, 4.350 in. Bore, .040 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5762-040

Not Yet Reviewed

Estimated Ship Date: Apr 8, 2026 if ordered today

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• Special Order

Head Gaskets, Multi-layer Steel, 4.137 in. Bore, 0.050 in. Compressed Thickness, Chevrolet, GMC, Hummer, 6.6L Diesel, Each

Part Number: MAH-54584

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Valve Cover Gaskets, PermaDry, Rubber, Chevy, GMC, Hummer, Pair

Part Number: FEL-VS50684R

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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• Special Order