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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
4.7 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Best fun indestructible toy
Color: Crinkle Duck (Yellow), Size: Large
Truly indestructible no matter how much our oittie tries. She has owned it for three months works at destroying every day with no success. She carries it everywhere. Best purchase for chewer, more fun than the popular rubber heavy duty toy. Do not hesitate your pup will thank you for this fun distraction.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 4
Happy with quality & price
Color: Crinkle Duck (Yellow), Size: Large
Lasts longer than most toys for the price
Only bought Kong or Outward Hound for
my 17 lb Lhasa Apso in the past a
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
My puppy tore it up in about 5min. She had a ball while it lasted.
Color: Crinkle Duck (Yellow), Size: Large
Cute, not durable
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
Monkee-doodle loves that it has a crinkle sound when playing tug-of -war
Color: Crinkle Chicken (Yellow), Size: Large
Monkee-doodle likes this toy because it has a squeaker and it also has a crinkle noise maker inside. She loves playing with the toy and it’s easy to spot since it is bright yellow in color. It is suitable for dogs and doesn’t have any pieces that can come loose and harm your pet.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
★★★★★ 5
Love it.
Color: Bunny (Beige), Size: Large
Good quality and well worth the price. My dog loves it. The squeaky part is fun, and the crinkly, tear-resistant paper in the ears makes playtime even more exciting.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
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