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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.

91 - 120 of 129 results

Best Seller Free Shipping
Picture of Cometic C5489-062 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-062 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

73 reviews
Part: C5489-062
Vehicle Specific
$126.82
Ships from manufacturer
Picture for manufacturer Cometic
Best Seller Free Shipping
Picture of Cometic C15361-051 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.810

Cometic C15361-051 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.810

6 reviews
Part: C15361-051
Vehicle Specific
$97.41
Ships from manufacturer
Picture for manufacturer Cometic
Best Seller Free Shipping
Picture of Cometic C15427-058 GM MLX Cylinder Head Gasket Bore - LT1/L86/L87 4.125

Cometic C15427-058 GM MLX Cylinder Head Gasket Bore - LT1/L86/L87 4.125

10 reviews
Part: C15427-058
Vehicle Specific
$121.71
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5476-027 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970

Cometic C5476-027 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970

69 reviews
Part: C5476-027
Vehicle Specific
$98.30
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5475-092 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910 092

Cometic C5475-092 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910 092

30 reviews
Part: C5475-092
Vehicle Specific
$140.43
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5318-089 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.160

Cometic C5318-089 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.160

34 reviews
Part: C5318-089
Vehicle Specific
$140.10
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5319-080 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190

Cometic C5319-080 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190

65 reviews
Part: C5319-080
Vehicle Specific
$126.82
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5477-092 MLS Cylinder Head Gasket GM Gen III/IV Bore - for LS1/LS2/LS3/LS6 4.000

Cometic C5477-092 MLS Cylinder Head Gasket GM Gen III/IV Bore - for LS1/LS2/LS3/LS6 4.000

75 reviews
Part: C5477-092
Vehicle Specific
$140.43
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5317-092 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

Cometic C5317-092 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

36 reviews
Part: C5317-092
Vehicle Specific
$140.10
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5317-032 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

Cometic C5317-032 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.130

47 reviews
Part: C5317-032
Vehicle Specific
$98.30
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5477-049 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.000

Cometic C5477-049 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.000

70 reviews
Part: C5477-049
Vehicle Specific
$98.14
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5505-044 LS Gen-3/4 Small Block V8 MLX Cylinder Head Gasket 4.040" Bore .044" Thick

Cometic C5505-044 LS Gen-3/4 Small Block V8 MLX Cylinder Head Gasket 4.040" Bore .044" Thick

56 reviews
Part: C5505-044
Vehicle Specific
$119.73
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5489-030 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-030 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

34 reviews
Part: C5489-030
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5489-089 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-089 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

78 reviews
Part: C5489-089
Vehicle Specific
$140.10
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5751-124 MLS Cylinder Head Gasket for GM LS1/LS2/LS3/LS6 4.060" Bore

Cometic C5751-124 MLS Cylinder Head Gasket for GM LS1/LS2/LS3/LS6 4.060" Bore

52 reviews
Part: C5751-124
Vehicle Specific
$231.78
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5476-056 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970

Cometic C5476-056 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970

29 reviews
Part: C5476-056
Vehicle Specific
$129.83
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5505-066 MLX Cylinder Head Gasket Bore Thick GM - 4.040 066 LS1/LS2/LS3/LS6

Cometic C5505-066 MLX Cylinder Head Gasket Bore Thick GM - 4.040 066 LS1/LS2/LS3/LS6

53 reviews
Part: C5505-066
Vehicle Specific
$127.79
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5477-098 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.000

Cometic C5477-098 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.000

75 reviews
Part: C5477-098
Vehicle Specific
$140.43
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5319-056 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190

Cometic C5319-056 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190

60 reviews
Part: C5319-056
Vehicle Specific
$101.32
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5489-075 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-075 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

5 reviews
Part: C5489-075
Vehicle Specific
$126.82
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5489-027 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-027 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.100

75 reviews
Part: C5489-027
Vehicle Specific
$98.30
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5477-060 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.000

Cometic C5477-060 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.000

65 reviews
Part: C5477-060
Vehicle Specific
$129.83
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5475-084 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

Cometic C5475-084 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

58 reviews
Part: C5475-084
Vehicle Specific
$140.10
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5477-066 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.000

Cometic C5477-066 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.000

51 reviews
Part: C5477-066
Vehicle Specific
$129.83
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5475-056 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

Cometic C5475-056 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

28 reviews
Part: C5475-056
Vehicle Specific
$129.83
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C15361-027 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 3.810

Cometic C15361-027 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 3.810

18 reviews
Part: C15361-027
Vehicle Specific
$98.30
Ships from manufacturer
Picture for manufacturer Cometic
Picture of Cometic C15437 GM Small Block Valley Pan Gasket - Gen-5 V8

Cometic C15437 GM Small Block Valley Pan Gasket - Gen-5 V8

24 reviews
Part: C15437
Vehicle Specific
$15.03
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5489-053 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-053 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

71 reviews
Part: C5489-053
Vehicle Specific
$123.70
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5319-066 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.190

Cometic C5319-066 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.190

63 reviews
Part: C5319-066
Vehicle Specific
$101.32
Ships from manufacturer
Picture for manufacturer Cometic
Free Shipping
Picture of Cometic C5319-027 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.190

Cometic C5319-027 MLS Cylinder Head Gasket GM Bore - LS1/LS2/LS3/LS6 4.190

38 reviews
Part: C5319-027
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.