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Description
GM 12643886 6.6L INTAKE MANIFOLD RHCondition: REBUILDABLE CORE USED The GM 6. 6L INTAKE MANIFOLD is engineered for heavy duty diesel applications commonly seen on Duramax powered vehicles including various Chevrolet and GMC models. Multiple sources affirm its fitment for 6. 6L engines ensuring precise air distribution and optimal engine performance. Details highlight that this manifold is designed to meet OEM standards for durability and efficiency in high mileage commercial and pickup
Condition: REBUILDABLE CORE/USEDThe GM 6.6L INTAKE MANIFOLD is engineered for heavy-duty diesel applications commonly seen on Duramax-powered vehicles including various Chevrolet and GMC models. Multiple sources affirm its fitment for 6.6L engines ensuring precise air distribution and optimal engine performance. Details highlight that this manifold is designed to meet OEM standards for durability and efficiency in high-mileage commercial and pickup trucks.
Fitment information provided with best effort, customer is ultimately responsible for fitment
Hollander Number 329-10045
| Application | Year(s) | Engine / Notes |
|---|---|---|
| SIERRA 2500 PICKUP | 17-19 | 6.6L lower R. |
| SIERRA 2500 PICKUP | 20-22 | Diesel lower R. |
| SIERRA 3500 PICKUP | 17-19 | 6.6L lower R. |
| SIERRA 3500 PICKUP | 20-22 | Diesel lower R. |
| SIERRA DENALI 2500 | 17-19 | 6.6L lower R. |
| SIERRA DENALI 2500 | 20-22 | Diesel lower R. |
| SIERRA DENALI 3500 | 17-19 | 6.6L lower R. |
| SIERRA DENALI 3500 | 20-22 | Diesel lower R. |
| SILVERADO 2500 PICKUP | 17-19 | 6.6L lower R. |
| SILVERADO 2500 PICKUP | 20 | (6.6L) Diesel lower R. |
| SILVERADO 2500 PICKUP | 21-23 | Diesel lower R. |
| SILVERADO 3500 PICKUP | 17-19 | 6.6L lower R. |
| SILVERADO 3500 PICKUP | 20 | (6.6L) Diesel lower R. |
| SILVERADO 3500 PICKUP | 21-24 | Diesel lower R. |
Part Number: 12643886
Manufacturer: GM
Weight: 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
4.7 ★★★★★
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Product Reviews
★★★★★ 5
Works great keep it charged
Color: 7-in-1 Silver, Size: Rechargeable Set
If you drink wine and you have a cork in your wine bottles, this opener works great Keep it charged.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
★★★★★ 5
Great for wine people
Color: 7-in-1 Silver, Size: Rechargeable Set
I have one of these and like it so much I bought one for a Christmas gift
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Like that it can be charged while it's stored
Color: 7-in-1 Silver, Size: Rechargeable Set
I like that this wine bottle opener can be charged on the stand, making it always ready to perform. No worry about batteries or needing a charge before the dinner/party. It's handy to have the foil cutter and aerator beside the bottle opener and the stoppers which use the end of the bottle opener to remove air from partial bottles for temporary storage were a plus!
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Efficient product
Color: 7-in-1 Silver, Size: Rechargeable Set
Excellent product, looks, and removal of corks.
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Reviewed in the United States on February 6, 2026
★★★★★ 5
Great product
Color: 7-in-1 Silver, Size: Rechargeable Set
Totally effortless for an amateur. Useful accessories
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Reviewed in the United States on June 1, 2026