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Description
GM Chevrolet 6.0L LC8 Complete 821 LPG / CNG OEM Cylinder Head Set | 12640011Condition: NEW NEW TAKE OFF The GM 12600821 Cylinder Head is engineered for optimum performance in GM Gen III and IV engines with multiple sources highlighting its compatibility with 6. 2L engines. This genuine GM component is designed to enhance combustion efficiency and engine power making it a reliable choice for vehicles ranging from certain Cadillac models to Chevrolet and GMC applications. The GM 12640011 Cylinder Head is engineered for powerful
Condition: NEW / NEW TAKE OFFThe GM 12600821 Cylinder Head is engineered for optimum performance in GM Gen III and IV engines with multiple sources highlighting its compatibility with 6.2L engines. This genuine GM component is designed to enhance combustion efficiency and engine power making it a reliable choice for vehicles ranging from certain Cadillac models to Chevrolet and GMC applications.
The GM 12640011 Cylinder Head is engineered for powerful 6.0L LC8 engine applications delivering reliable performance for trucks vans and commercial vehicles. This OEM quality component meets GM standards for durability and efficiency across various platforms.
Hollander Number 306-00273
| Application | Year(s) | Engine / Fuel Type / Notes |
|---|---|---|
| EXPRESS 2500 VAN | 11-16 | 8-364 (6.0L) CNG (opt LC8) |
| EXPRESS 2500 VAN | 17-20 | 6.0L CNG (opt LC8) |
| EXPRESS 3500 VAN | 11-16 | 8-364 (6.0L) CNG (opt LC8) |
| EXPRESS 3500 VAN | 11-16 | 8-364 (6.0L) LPG (opt LC8) |
| EXPRESS 3500 VAN | 17-20 | 6.0L CNG (opt LC8) |
| EXPRESS 3500 VAN | 17-20 | 6.0L LPG (opt LC8) |
| SAVANA 2500 VAN | 11-16 | 8-364 (6.0L) CNG (opt LC8) |
| SAVANA 2500 VAN | 17-20 | 6.0L CNG (opt LC8) |
| SAVANA 3500 VAN | 11-16 | 8-364 (6.0L) CNG (opt LC8) |
| SAVANA 3500 VAN | 11-16 | 8-364 (6.0L) LPG (opt LC8) |
| SAVANA 3500 VAN | 17-18 | 6.0L LPG (opt LC8) |
| SAVANA 3500 VAN | 17-20 | 6.0L CNG (opt LC8) |
| SIERRA 2500 PICKUP | 13-19 | 6.0L CNG |
| SIERRA 3500 PICKUP | 15-19 | 6.0L CNG |
| SIERRA DENALI 2500 | 14-18 | 6.0L CNG |
| SIERRA DENALI 3500 | 15-18 | 6.0L CNG |
| SILVERADO 2500 PICKUP | 13-19 | 6.0L CNG |
| SILVERADO 3500 PICKUP | 15-19 | 6.0L CNG |
Part Number: 12640011
Manufacturer: GM
Weight: 60.0000 lbs
Additional Details:
Genuine OEM Parts
Please research/ensure fitment of part to your specific vehicle before purchasing. Returns because of non-fitment are accepted with a re-stocking fee, however customer is responsible for return shipping.
Shipping:
If shipping outside the contiguous 48 states is required, reach out to [email protected] to confirm shipping details.
About Us:
Custard Core Supply provides the highest quality of new, new take off, used, and core parts. We provide a variety of gas and diesel parts to our customers. Based in Dallas, TX Custard Core Supply has been in business since 1998. If you do not see a product you are looking for on our page, please reach out!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Great fit, functional, most comfortable shorts!
Size: 30, Color: Anthracite Camo
These are my go-to shorts, I now have five pair in different camo colors! I suggest one waist size smaller than you normally wear, (I buy a 30 instead of a 32, because they stretch and would be too sloppy if I purchased my regular size). The large open slotted pocket on the left, behind the Velcro flap pocket, is perfect for a normal sized cell phone. Plenty of utility pockets for EDC. Since these stretch slightly to accommodate movement and sitting, they are extremely comfortable. Also, my wife says they are good looking on me, so that gets an extra star!
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Reviewed in the United States on March 24, 2026
★★★★★ 5
great shorts
Size: 38, Color: Gunmetal
excellent shorts. slightly loose around the waist, which i prefer. inseam is perfect just above the knee. light weight
and roomy. wash well.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Love the material!
Size: Large, Color: Black
Very soft and beautiful material. The size was perfect. It works well for layering and can also be dressed up. It is not clingy at all. The quality is great.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Worked well for my needs!
Size: X-Large, Color: Black
Nice thick material. I think these could be workout shirts or regular day attire. Soft, wash well, nice stretch, and arm pit gaps aren’t a so wide they look silly or sloppy. Good value for the money. True to size as well.
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Reviewed in the United States on April 24, 2026
★★★★★ 4
Great Fit & Great Price
Size: 3X-Large, Color: White
The material is very nice and soft but not clingy. It’s light weight but not see through in both white and peach. This tank fits true to size and has no gaps under the arm like some other tanks I’ve tried. It’s a perfect layering piece under shirts and sweaters. Very affordable and well made. I’m a plus size lady who is happy with the fit.
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Reviewed in the United States on February 19, 2026