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Description
GM LS2 LS6 Gen III Gen IV Genuine OEM Cylinder Head 799 Assembly with Valves and SpringsCondition: USED REBUILDABLE CORE This Cylinder Head part number 12629058 is engineered for optimal engine performance in many V8 applications. Designed to enhance combustion cooling and overall power output it is widely used in vehicles such as light trucks and performance models. The part has demonstrated reliability in 5. 3L engines and its quality is supported by multiple technical sources and fitment records. Fitment information provided with best
Condition: USED/REBUILDABLE COREThis Cylinder Head part number 12629058 is engineered for optimal engine performance in many V8 applications. Designed to enhance combustion cooling and overall power output it is widely used in vehicles such as light trucks and performance models. The part has demonstrated reliability in 5.3L engines and its quality is supported by multiple technical sources and fitment records.
Fitment information provided with best effort, customer is ultimately responsible for fitment
Hollander Number 306-01749A
| Application | Year(s) | Engine / Notes |
|---|---|---|
| CAMARO | 99-02 | 8-350 (5.7L) |
| CORVETTE | 99-00 | |
| CORVETTE | 01-04 | LS1 engine (VIN G 8th digit) |
| FIREBIRD | 99-02 | 5.7L |
| GTO | 04 |
Hollander Number 306-01749B
| Application | Year(s) | Engine / Notes |
|---|---|---|
| ALLURE | 08-09 | 5.3L |
| AVALANCHE 1500 | 07-10 | 5.3L |
| AVALANCHE 1500 | 11-13 | |
| CANYON | 09-12 | 5.3L |
| COLORADO | 09-12 | 5.3L |
| CORVETTE | 01-04 | LS6 engine (VIN S 8th digit) |
| CORVETTE | 05 | |
| CORVETTE | 06-07 | 6.0L |
| CTS | 04-05 | 5.7L (VIN S 8th digit 8-350) |
| CTS | 06-07 | 6.0L (VIN U 8th digit 8-364) |
| ENVOY | 05-09 | 5.3L (Denali) |
| ENVOY XL | 05-06 | 5.3L |
| ENVOY XUV | 05 | 5.3L |
| ESCALADE | 09-13 | 6.0L (Hybrid) |
| EXPRESS 1500 VAN | 08-14 | 8-323 (5.3L) |
| EXPRESS 2500 VAN | 08-12 | 8-323 (5.3L) |
| EXPRESS 2500 VAN | 08-16 | 8-292 (4.8L) |
| EXPRESS 2500 VAN | 17 | 4.8L |
| EXPRESS 3500 VAN | 08-16 | 8-292 (4.8L) |
| EXPRESS 3500 VAN | 17 | 4.8L |
| GRAND PRIX | 05-08 | 5.3L |
| GTO | 05-06 | |
| HUMMER H3 | 08-10 | 5.3L |
| IMPALA | 06-09 | 5.3L |
| ISUZU ASCENDER | 05-06 | 5.3L |
| LACROSSE | 08-09 | 5.3L |
| MONTE CARLO | 06-07 | 5.3L |
| RAINIER | 05-07 | 5.3L |
| SAAB 9-7X | 05-09 | 8 cylinder |
| SAVANA 1500 VAN | 08-14 | 8-323 (5.3L) |
| SAVANA 2500 VAN | 08-12 | 8-323 (5.3L) |
| SAVANA 2500 VAN | 08-16 | 8-292 (4.8L) |
| SAVANA 2500 VAN | 17 | 4.8L |
| SAVANA 3500 VAN | 08-16 | 8-292 (4.8L) |
| SAVANA 3500 VAN | 17 | 4.8L |
| SIERRA 1500 PICKUP | 05-06 | 5.3L VIN B (8th digit opt L33) |
| SIERRA 1500 PICKUP | 07 | classic style (creased door skin) 5.3L VIN B (8th digit opt L33) |
| SIERRA 1500 PICKUP | 07 | style (smooth door skin) 4.8L |
| SIERRA 1500 PICKUP | 07 | style (smooth door skin) 5.3L |
| SIERRA 1500 PICKUP | 08-10 | 5.3L |
| SIERRA 1500 PICKUP | 08-13 | 4.8L |
| SIERRA 1500 PICKUP | 09 | 6.0L hybrid option (opt HP2) |
| SIERRA 1500 PICKUP | 10-13 | 6.0L |
| SIERRA 1500 PICKUP | 11-13 | 5.3L gasoline |
| SILVERADO 1500 PICKUP | 05-06 | 5.3L VIN B (8th digit opt L33) |
| SILVERADO 1500 PICKUP | 07 | classic style (creased door skin) 5.3L VIN B (8th digit opt L33) |
| SILVERADO 1500 PICKUP | 07 | style (smooth door skin) 4.8L |
| SILVERADO 1500 PICKUP | 07 | style (smooth door skin) 5.3L |
| SILVERADO 1500 PICKUP | 08-10 | 5.3L |
| SILVERADO 1500 PICKUP | 08-13 | 4.8L |
| SILVERADO 1500 PICKUP | 09 | 6.0L hybrid option (opt HP2) |
| SILVERADO 1500 PICKUP | 10-13 | 6.0L |
| SILVERADO 1500 PICKUP | 11-13 | 5.3L gasoline |
| SSR | 05-06 | |
| SUBURBAN 1500 | 07-09 | 8-323 (5.3L) |
| SUBURBAN 1500 | 10-14 | (5.3L) |
| TAHOE | 07 | |
| TAHOE | 08-09 | 4.8L |
| TAHOE | 08-09 | 5.3L |
| TAHOE | 08-09 | 6.0L |
| TAHOE | 10-14 | |
| TRAILBLAZER | 06-08 | 5.3L |
| TRAILBLAZER | 06-09 | 6.0L |
| TRAILBLAZER EXT | 05-06 | 5.3L |
| YUKON | 07-09 | 4.8L |
| YUKON | 07-14 | 5.3L |
| YUKON | 08-13 | 6.0L |
| YUKON XL 1500 | 07-14 | 5.3L |
Part Number: 12629058
Manufacturer: GM
Weight: 26.0000 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
4.5 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Tasha's favorite toy
Color: Blue
A little smaller than expected, but my puppy loves it! We've only had it for a few days, but it seems like it will hold up well.
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Reviewed in the United States on November 9, 2025
★★★★★ 2
Not for Destructive Dogs
Color: Blue
It might be okay for a little dog, but my heeler had it dismantled in short order and I threw it away. Cute toy, but not for a destructive dog.
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Reviewed in the United States on November 17, 2025
★★★★★ 5
Cute and well made, fun toy for dogs of all sizes.
Color: Frog (Green)
My small dogs luv this toy, especially the handle part for playing tug of war. My peekapoo is only 14 lbs. but he loves to get a grip on the handle with his mouth and tug really hard which also stretches the body and makes the crunchy noises! My chihuahua loves it too and she tries to grab the eyes with her mouth. It is a very well made toy with a squeaker and light stuffing in the head which makes me feel good about letting them play with it. It is strong and very cute and I think they will have it for a long time.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Octopus dog toy
My dogs love this toy! They love to play tug of war with it, using the rope legs. The legs will pull out if they are strong dogs! But if the dogs are having fun with it, it isn't a problem. One of my dogs has shredded some of the legs and put a hole in yhe body, but she is a strong chewer. There is a squeaker in the octopus body. They enjoy the toy, so I would recommend it.
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Reviewed in the United States on February 28, 2024
★★★★★ 4
Decent toy! Dog ripped off legs after a couple days.
As the title says the toy was pretty durable and it’s made of a good rubber which makes it durable. My dog is a medium sized pomsky and she had a hard time gripping the shell part. I stuffed the middle part with treats which by the way DO NOT do that. My dog got really frustrated bc the treats weren’t coming out and idk what happened bc she ended up gagging and coughing. No throw up tho so good enough for me. While my review seems pretty daunting it’s really not a bad toy if you make sure to keep an eye on the rope appendages.
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Reviewed in the United States on July 18, 2023