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GMC Sierra Engine Gaskets and Seals

Engine gaskets and seals are among the foundational components that keep a GMC Sierra's engine assembly properly contained, covering model years 2002 through 2025. The range here includes cylinder head gaskets, oil drain plug gaskets, manifold gaskets, and more — in OE replacement and performance-oriented options. Select your year above and we'll show only the engine gaskets and seals that fit your GMC Sierra. Fitment is checked against our vehicle data for every part listed.

31 - 60 of 129 results

Best Seller Free Shipping
Picture of Cometic C5317-036 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

Cometic C5317-036 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

77 reviews
Part: C5317-036
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Best Seller Free Shipping
Picture of Cometic C5318-036 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.160

Cometic C5318-036 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.160

59 reviews
Part: C5318-036
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Best Seller Free Shipping
Picture of Cometic C5476-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970

Cometic C5476-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970

57 reviews
Part: C5476-045
Vehicle Specific
$97.41
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5476-040 MLS Head Gasket GM LS1 LS2 LS3 LS6 Gen 3/4 3.970 Bore

Cometic C5476-040 MLS Head Gasket GM LS1 LS2 LS3 LS6 Gen 3/4 3.970 Bore

76 reviews
Part: C5476-040
Vehicle Specific
$97.41
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5317-027 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

Cometic C5317-027 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

42 reviews
Part: C5317-027
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5319-040 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190 040

Cometic C5319-040 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190 040

71 reviews
Part: C5319-040
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5318-030 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.160

Cometic C5318-030 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.160

71 reviews
Part: C5318-030
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5319-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190 045

Cometic C5319-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190 045

40 reviews
Part: C5319-045
Vehicle Specific
$97.41
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5476-051 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970

Cometic C5476-051 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970

24 reviews
Part: C5476-051
Vehicle Specific
$97.41
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5475-027 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

Cometic C5475-027 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

71 reviews
Part: C5475-027
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5477-036 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.000

Cometic C5477-036 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.000

65 reviews
Part: C5477-036
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5477-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.000

Cometic C5477-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.000

66 reviews
Part: C5477-045
Vehicle Specific
$97.41
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5475-036 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 3.910

Cometic C5475-036 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 3.910

53 reviews
Part: C5475-036
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5319-030 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190

Cometic C5319-030 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190

40 reviews
Part: C5319-030
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5319-060 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190

Cometic C5319-060 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190

55 reviews
Part: C5319-060
Vehicle Specific
$101.32
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5318-027 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.160

Cometic C5318-027 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.160

67 reviews
Part: C5318-027
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5751-140 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.060

Cometic C5751-140 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.060

40 reviews
Part: C5751-140
Vehicle Specific
$228.77
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Mr. Gasket Valley Pan Cover Bolt Sets for GM LS Engines

Mr. Gasket Valley Pan Cover Bolt Sets for GM LS Engines

57 reviews
Vehicle Specific
from $44
In Stock (10+)
Picture for manufacturer Mr. Gasket
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Picture of Mr. Gasket Lifter Valley Gaskets

Mr. Gasket Lifter Valley Gaskets

55 reviews
Vehicle Specific
from $50
In Stock (10+)
Picture for manufacturer Mr. Gasket
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Picture of MAHLE Engine Conversion Gasket Set

MAHLE Engine Conversion Gasket Set

12 reviews
Vehicle Specific
from $31
In Stock (10+)
Picture for manufacturer MAHLE
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Picture of Cometic C5751-098 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.060

Cometic C5751-098 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.060

57 reviews
Part: C5751-098
Vehicle Specific
$140.43
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5475-075 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

Cometic C5475-075 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

57 reviews
Part: C5475-075
Vehicle Specific
$126.82
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5317-089 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

Cometic C5317-089 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

8 reviews
Part: C5317-089
Vehicle Specific
$140.10
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5317-080 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130 080

Cometic C5317-080 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130 080

43 reviews
Part: C5317-080
Vehicle Specific
$140.10
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5489-120 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-120 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.100

52 reviews
Part: C5489-120
Vehicle Specific
$232.11
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5489-098 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-098 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

50 reviews
Part: C5489-098
Vehicle Specific
$140.43
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5489-086 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-086 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

67 reviews
Part: C5489-086
Vehicle Specific
$140.10
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5475-030 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

Cometic C5475-030 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

19 reviews
Part: C5475-030
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5751-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.060

Cometic C5751-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.060

11 reviews
Part: C5751-045
Vehicle Specific
$97.41
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5751-036 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.060

Cometic C5751-036 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.060

32 reviews
Part: C5751-036
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic

What's here for your GMC Sierra

  • Engine cylinder head gaskets, available as individual gaskets and full kits
  • Engine oil drain plug gaskets in rubber and OE-style materials
  • Manifold gaskets for front and rear positions
  • Performance and OE replacement gasket sets

The widest selection here comes from Cometic, ACDelco, Victor, and Dorman, spanning a broad range of gasket types, materials, and fitment styles for the GMC Sierra. Other categories GMC Sierra owners shop for: GMC Sierra Exterior Lights, GMC Sierra Valve Train Parts and GMC Sierra Springs and Suspension Parts, or browse all GMC Sierra parts and accessories.