Genuine 2020 GMC Sierra Head Gasket

Engine Cylinder Head Gasket

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Model

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

13 Head Gaskets found

View related parts
2020 GMC Sierra Gasket, Cyl Hd
Part Number: 12688943
$70.24 MSRP: $104.77
You Save: $34.53 (33%)
ADD TO CART
Product Specifications
- Other Name: Head Gasket
- Replaces: 12659260, 12622331
- Item Weight: 1.10 Pounds
- Item Dimensions: 8.2 x 20.8 x 1.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12688943
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, CREW CAB 1/2 TON, CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 6.2L
View related parts
2020 GMC Sierra Gasket, Cyl Head
Part Number: 12622325
$55.08 MSRP: $82.17
You Save: $27.09 (33%)
ADD TO CART
Product Specifications
- Other Name: GASKET, Engine Cylinder Head; Head Gasket
- Item Weight: 1.20 Pounds
- Item Dimensions: 21.9 x 8.8 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12622325
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW CAB 1/2 TON, CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L, 8 Cyl5.3L
View related parts
2020 GMC Sierra Gasket, Cyl Head
Part Number: 12632968
$75.76 MSRP: $125.39
You Save: $49.63 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: GASKET, Engine Cylinder Head; Head Gasket
- Item Weight: 1.00 Pounds
- Item Dimensions: 16.0 x 9.0 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12632968
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW CAB 1/2 TON, CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 6 Cyl 4.3L
View related parts
2020 GMC Sierra Gasket, Cyl Hd
Part Number: 55512641
$29.81 MSRP: $49.33
You Save: $19.52 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Head Gasket
- Replaced by: 40009080
- Item Weight: 1.70 Pounds
- Item Dimensions: 26.9 x 12.3 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 55512641
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON | 6 Cyl 3.0L Diesel
View related parts
2020 GMC Sierra Gasket, Cyl Hd
Part Number: 12688186
$61.58 MSRP: $107.18
You Save: $45.60 (43%)
Ships in 1-2 Business Days

Out of Stock
Product Specifications
- Other Name: Head Gasket
- Item Weight: 1.10 Pounds
- Item Dimensions: 21.7 x 9.1 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12688186
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- CREW CAB 1 TON CHASSIS 137.0, CREW CAB 6'6" BOX 1 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 1 TON, CREW CAB 8' BOX 3/4 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 1 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CREW CAB 1 TON CHASSIS 161.5, REGULAR CAB 1 TON CHASSIS 137.0, REGULAR CAB 1 TON CHASSIS 161.5, REGULAR CAB 8' BOX 1 TON, REGULAR CAB 8' BOX 3/4 TON | 8 Cyl 6.6L
View related parts
2020 GMC Sierra Gasket, Cyl Hd (Grade "C").
Part Number: 12676859
$67.65 MSRP: $106.45
You Save: $38.80 (37%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Head Gasket
- Replaced by: 12727486
- Replaces: 12679698, 12636480
- Item Weight: 1.20 Pounds
- Item Dimensions: 9.5 x 21.8 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12676859
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- 2500 CREW CAB STANDARD BOX, 2500 REGULAR CAB, 2500 REGULAR CAB STANDARD BOX, 3500 CREW CAB LONG BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR CAB, CREW CAB 1 TON CHASSIS 137.0, CREW CAB 2500 LONG BOX, CREW CAB 6'6" BOX 1 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 1 TON, CREW CAB 8' BOX 3/4 TON, DOUBLE CAB 2500 LONG BOX, DOUBLE CAB 2500 STANDARD BOX, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 1 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CREW CAB 1 TON CHASSIS 161.5, REGULAR CAB 1 TON CHASSIS 137.0, REGULAR CAB 1 TON CHASSIS 161.5, REGULAR CAB 8' BOX 1 TON, REGULAR CAB 8' BOX 3/4 TON | 8 Cyl 6.6L Diesel
View related parts
2020 GMC Sierra Gasket, Cyl Head (Grade "B".Used Both Lh Anodized*For Grade Se
Part Number: 12636479
$60.05 MSRP: $94.49
You Save: $34.44 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Gasket, Cyl Hd (Grade "B".Lh And Rh Sides); Head Gasket
- Replaced by: 12727485
- Item Weight: 1.20 Pounds
- Item Dimensions: 9.1 x 21.8 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12636479
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- 2500 CREW CAB STANDARD BOX, 2500 REGULAR CAB, 2500 REGULAR CAB STANDARD BOX, 3500 CREW CAB LONG BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR CAB, CREW CAB 1 TON CHASSIS 137.0, CREW CAB 2500 LONG BOX, CREW CAB 6'6" BOX 1 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 1 TON, CREW CAB 8' BOX 3/4 TON, DOUBLE CAB 2500 LONG BOX, DOUBLE CAB 2500 STANDARD BOX, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 1 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CREW CAB 1 TON CHASSIS 161.5, REGULAR CAB 1 TON CHASSIS 137.0, REGULAR CAB 1 TON CHASSIS 161.5, REGULAR CAB 8' BOX 1 TON, REGULAR CAB 8' BOX 3/4 TON | 8 Cyl 6.6L Diesel
View related parts
2020 GMC Sierra Gasket, Cyl Hd (Grade "A")
Part Number: 12676857
$52.08 MSRP: $81.95
You Save: $29.87 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Head Gasket
- Replaced by: 12727484
- Replaces: 12636478, 12679696
- Item Weight: 1.20 Pounds
- Item Dimensions: 9.1 x 22.5 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12676857
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- 2500 CREW CAB STANDARD BOX, 2500 REGULAR CAB, 2500 REGULAR CAB STANDARD BOX, 3500 CREW CAB LONG BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR CAB, CREW CAB 1 TON CHASSIS 137.0, CREW CAB 2500 LONG BOX, CREW CAB 6'6" BOX 1 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 1 TON, CREW CAB 8' BOX 3/4 TON, DOUBLE CAB 2500 LONG BOX, DOUBLE CAB 2500 STANDARD BOX, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 1 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CREW CAB 1 TON CHASSIS 161.5, REGULAR CAB 1 TON CHASSIS 137.0, REGULAR CAB 1 TON CHASSIS 161.5, REGULAR CAB 8' BOX 1 TON, REGULAR CAB 8' BOX 3/4 TON | 8 Cyl 6.6L Diesel
View related parts
2020 GMC Sierra Gasket, Cyl Hd
Part Number: 12691233
$20.59 MSRP: $32.40
You Save: $11.81 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Head Gasket
- Item Weight: 0.90 Pounds
- Item Dimensions: 22.5 x 10.2 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12691233
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 4 Cyl 2.7L
View related parts
2020 GMC Sierra Gasket Kit, Cyl Hd
Part Number: 12693569
$34.53 MSRP: $54.33
You Save: $19.80 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Head Gasket, Intake Manifold Gasket Set
- Replaces: 12696188
- Item Weight: 4.60 Pounds
- Item Dimensions: 21.6 x 10.1 x 2.3 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12693569
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 4 Cyl 2.7L
View related parts
2020 GMC Sierra Gasket, Cyl Hd
Part Number: 55512642
$66.48 MSRP: $110.03
You Save: $43.55 (40%)
ADD TO CART
Product Specifications
- Other Name: Head Gasket
- Replaced by: 40009081
- Item Weight: 1.80 Pounds
- Item Dimensions: 27.4 x 12.2 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 55512642
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON | 6 Cyl 3.0L Diesel
View related parts
2020 GMC Sierra Gasket, Cyl Hd
Part Number: 55512640
$69.43 MSRP: $114.92
You Save: $45.49 (40%)
ADD TO CART
Product Specifications
- Other Name: Head Gasket
- Replaced by: 40009079
- Item Weight: 1.60 Pounds
- Item Dimensions: 27.4 x 12.5 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 55512640
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON | 6 Cyl 3.0L Diesel
View related parts
2020 GMC Sierra Gasket Kit, Cyl Head
Part Number: 12657967
$114.74 MSRP: $181.35
You Save: $66.61 (37%)
Product Specifications
- Other Name: GASKET KIT, Engine Cylinder Head; Valve Grind Gasket Kit
- Item Weight: 1.30 Pounds
- Item Dimensions: 22.6 x 16.0 x 3.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12657967
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2020 GMC Sierra Submodels:
- 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW CAB 1/2 TON, CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 6 Cyl 4.3L

Related 2020 GMC Sierra Parts

Alternate Year Models

2019 GMC Sierra Head Gasket 2021 GMC Sierra Head Gasket