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Description
12629058 5.3L Cylinder HeadThis 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. Hollander Number 306 01749A Application CAMARO 99 02 8 350 (5. 7L)
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. Hollander Number 306-01749A Application 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 04Hollander Number 306-01749B Application 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 whybrid 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 whybrid 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 5.3LPart 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 25 reviews
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Product Reviews
★★★★★ 5
Mapping all areas first
Size: C20 renewed
Great vac
Quick delivery
Easy set up
Mop wasn’t responding and customer service was amazing to help troubleshoot and get the problem resolved.
A little frustrated at first because the chat wasn’t as helpful and I could not reach them by phone but the email techs replied immediately and promptly responses and help.
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Reviewed in the United States on September 28, 2025
★★★★★ 4
Rattles like a vibrator when it mops after about 2 weeks.
Size: C20 renewed
Works ok. Vacuum beater and opening is only about 6 inches long and the dirt box in the bot is really tiny. Beater is way to tiny to do any real vacuuming on even short shag rugs.
The mop works but basically just evenly spreads out whatever dirt is on the floor, evenly across your entire floor and sands the floor with it.
After about 2 weeks the bot starts rattling REALLY loud and vibrating like its falling apart. The crazy loud rattling noise is coming from the plastic mop pad axles when they spin.
The vacuum bag inside the base is very good quality, but small and not reusable. I cut the far end of the bag down the middle and glued on some velcro strips to each side to re-close it, which allows me to empty the bag and then close it back up again. Pretty sure this thing transmits everything it sees/does back to China.
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Reviewed in the United States on April 30, 2026
★★★★★ 1
Issues
Size: C20 renewed
Spent all this money for it to consistently have problems. It doesn’t even mop anymore because it keeps saying there is a problem with the sewage tank. I’ve only turned it on less than 5 times and it’s already having issues. Can’t even get it to mop anymore
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Works great
Size: C20 renewed
I saved some money by purchasing this certified like new. Worked well out of the box, but there was an issue with it and the people that do in fact check to ensure these work should do a better job. The issue was with the water and emptying it into the dirty tank. Just kept giving me an error. So, I had to look online for troubleshooting issues. After maybe 20-30 minutes I figured out a tiny little metal piece was loose where the water would have been distributed to. I was able to pop it out and place it back in. After that, and with the right settings selected through the app, everything works great. Well worth it.
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Reviewed in the United States on March 29, 2026
★★★★★ 3
Good mop, bad avoidance
Size: C20 renewed, Size: C20 renewed
I have mixed feelings about this product:
The good – It does in fact clean very well. The mop picks up dirt effectively and the vacuum works very well. It was also surprisingly good at swapping from carpet to wood. I have a high door mat and it ran right over that. It was also good at mapping rooms and positioning, the floor map and restricted areas worked nicely. App also works well.
The bad – Obstacle avoidance, it has none. It will run into everything over and over. If the item is too light (shoes, mic items, etc), it will run up on top of them or push them. It will also get stuck if it runs over something. Cords have no chance. The lidar does not work for anything except a wall, and even there it was unable to deal with short trim (1” trim was too low for the lidar and it kept running into the trim). I was having to run around and ensure there was nothing on the floor for it to work effectively. It also had a lot of trouble with my dining table, it would spend 20 min bumping up against it trying to get everywhere.
Overall – this is a great robot mop if your floors don’t have any items on them (or you can restrict any loose items to one area and make it a no-go zone). If that is true then this is a great mop for the price and I would recommend. In practice for me it turned out to be quite annoying due to its limited obstacle avoidance and was almost more of a pain then just using a Swiffer.
Note – I had to return because it was making a scraping noise (refurbished version), that is not reflecting in my rating. Though I am also not re-buying due to these issues.
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Reviewed in the United States on September 11, 2025
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