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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
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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
4.3 ★★★★★
Based on 2050 reviews
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Product Reviews
★★★★★ 5
Very image detailed, thorough history of WW II told through maps
Format: Hardcover
World War II Map by Map (DK History Map by Map) is a visually striking and informative guide to the pivotal events of World War II. Through detailed maps, the book offers a unique perspective on the war’s key battles, strategies, and turning points, providing a clear and accessible way to understand the conflict’s complex geography. Accompanied by concise descriptions and timelines, this book serves as both an educational resource and a compelling visual history. It is ideal for readers seeking a deeper understanding of the war’s global impact without feeling overwhelmed by text-heavy narratives. A must-have for history enthusiasts and visual learners alike.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 4, 2024
★★★★★ 4
Entertaining, informative, without being overwhelming.
Format: Hardcover, Format: Hardcover
Got it for, basically, half-off standard retail. At that price, it's a fine addition to the WWII library. Some interesting information displayed in a mostly entertaining way. I get that battle maps are always a challenge (maps are static - battles are dynamic). This does a fairly adequate job - better than most battle maps - though far from groundbreaking. item arrived well packed - no issues with binding (as some others seem to report). Though the book overall is a bit "warped" and several of the maps are mis-printed or mis-cut as to make them unusable. 3 bad out of 300 - not horrible - again at the price I paid. If the subject interest you - I'd suggest getting - but not a "must have".
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Reviewed in the United States on July 17, 2025
★★★★★ 5
So neat
Format: Hardcover
The pages are high quality and it's a fascinating read. It's a well put together book. It's also a great gift for history buffs. Overall quality is excellent.
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Reviewed in the United States on March 1, 2026
★★★★★ 5
For the history buff or student - this is worth the purchase
Format: Hardcover
Detailed, individual maps and history on the battles of World War II. It isn’t too overwhelming for the student and is an enjoyable read for the history buff. Hardback so it will ensure lots of reading and reviews, durable pages too (not those thin, flimsy, easily tearable pages!) - this book will likely stand the test of our schooling years and beyond.
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Reviewed in the United States on August 27, 2025
★★★★★ 5
Grandson gift
Format: Hardcover
This was purchased for my grandson for Christmas and he was thrilled with it. He collects all things pertaining to WWll.
Even his friends enjoyed it. Pictures clear and easy to read.
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Reviewed in the United States on January 23, 2026
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