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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.

61 - 90 of 129 results

Best Seller Free Shipping
Picture of Cometic C5475-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

Cometic C5475-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

39 reviews
Part: C5475-045
Vehicle Specific
$97.41
Ships from manufacturer
Picture for manufacturer Cometic
Best Seller 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
Best Seller Free Shipping
Picture of Cometic C5751-027 MLS Cylinder Head Gasket GM Gen III/IV Bore - for LS1/LS2/LS3/LS6 4.060

Cometic C5751-027 MLS Cylinder Head Gasket GM Gen III/IV Bore - for LS1/LS2/LS3/LS6 4.060

55 reviews
Part: C5751-027
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5319-036 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190 036

Cometic C5319-036 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.190 036

11 reviews
Part: C5319-036
Vehicle Specific
$97.39
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5318-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.160 045

Cometic C5318-045 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.160 045

13 reviews
Part: C5318-045
Vehicle Specific
$98.30
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5751-084 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.060

Cometic C5751-084 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.060

15 reviews
Part: C5751-084
Vehicle Specific
$137.09
Ships from manufacturer
Picture for manufacturer Cometic
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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
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Picture of Cometic C5489-140 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

Cometic C5489-140 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.100

56 reviews
Part: C5489-140
Vehicle Specific
$231.78
Ships from manufacturer
Picture for manufacturer Cometic
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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
Picture of Cometic C15030 GM Gen III/IV LS Engine Valve Cover Grommet Set

Cometic C15030 GM Gen III/IV LS Engine Valve Cover Grommet Set

40 reviews
Part: C15030
Vehicle Specific
$11.52
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 C5489-053 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
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Picture of Cometic C5014-032 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.150 032

Cometic C5014-032 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.150 032

47 reviews
Part: C5014-032
Vehicle Specific
$117.72
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 C5475-054 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

Cometic C5475-054 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.910

76 reviews
Part: C5475-054
Vehicle Specific
$129.83
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 C5477-030 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.000 030

Cometic C5477-030 GM MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.000 030

27 reviews
Part: C5477-030
Vehicle Specific
$98.30
Ships from manufacturer
Picture for manufacturer Cometic
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Picture of Cometic C5476-075 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970 075

Cometic C5476-075 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 3.970 075

50 reviews
Part: C5476-075
Vehicle Specific
$129.83
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 C5751-086 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.060

Cometic C5751-086 MLS Cylinder Head Gasket GM Gen III/IV Bore - LS1/LS2/LS3/LS6 4.060

55 reviews
Part: C5751-086
Vehicle Specific
$139.28
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
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
Free Shipping
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 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
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 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
Free Shipping
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
Free Shipping
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

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.