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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
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Description
Cometic GM 2017+ LP5 Duramax .060in MLX Cylinder Head Gasket - 4.161in BoreCOMETIC MLX (Multi Layer Stopper) gaskets utilize an integrated stopper layer for combustion chamber sealing and improved clamp load around the cylinder without increasing bore distortion. MLX technology can be found in some head gaskets and are made from the same materials as our MLS Head Gaskets. No sealants or re torque required. This Part Fits: Year Make Model Submodel 2017 2020 Chevrolet Silverado 2500 HD High Country 2017 2020 Chevrolet
COMETIC MLX (Multi-Layer Stopper) gaskets utilize an integrated stopper layer for combustion chamber sealing and improved clamp load around the cylinder without increasing bore distortion. MLX technology can be found in some head gaskets and are made from the same materials as our MLS Head Gaskets. No sealants or re-torque required.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2020 | Chevrolet | Silverado 2500 HD | High Country |
| 2017-2020 | Chevrolet | Silverado 2500 HD | LT |
| 2017-2020 | Chevrolet | Silverado 2500 HD | LTZ |
| 2017-2020 | Chevrolet | Silverado 2500 HD | WT |
| 2017-2020 | Chevrolet | Silverado 3500 HD | High Country |
| 2017-2020 | Chevrolet | Silverado 3500 HD | LT |
| 2017-2020 | Chevrolet | Silverado 3500 HD | LTZ |
| 2017-2020 | Chevrolet | Silverado 3500 HD | WT |
| 2020 | GMC | Sierra 2500 HD | AT4 |
| 2017-2020 | GMC | Sierra 2500 HD | Base |
| 2017-2020 | GMC | Sierra 2500 HD | Denali |
| 2017-2020 | GMC | Sierra 2500 HD | SLE |
| 2017-2020 | GMC | Sierra 2500 HD | SLT |
| 2020 | GMC | Sierra 3500 HD | AT4 |
| 2017-2020 | GMC | Sierra 3500 HD | Base |
| 2017-2020 | GMC | Sierra 3500 HD | Denali |
| 2017-2020 | GMC | Sierra 3500 HD | SLE |
| 2017-2020 | GMC | Sierra 3500 HD | SLT |
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 18 reviews
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Product Reviews
★★★★★ 5
Effective,low dose melatonin
Purchased this product again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
★★★★★ 3
Three Stars
Will help you sleep.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 8, 2016
★★★★★ 5
Good
The only melatonin that works for me
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
★★★★★ 5
Source Naturals Melatonin is the best!
My husband and I have been using Source Naturals Melatonin for almost 25 years. I have tried a few other brands, and I definitely think Source Naturals is the best! I once saw a program on Discovery channel about how Melatonin is an important heart antioxidant, and that after age 40 the Melatonin in our system goes way down. We had also just moved to a high altitude town, and I was having great difficulty sleeping because of the high altitude. We started taking Source Naturals Melatonin, and I was able to sleep like a baby. I really recommend the time release especially, and we also take a 1 mg sublingual lozenge to fall asleep more quickly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 27, 2017
★★★★★ 5
surprised!
I actually didn't realize I had ordered "time released" version. I thought these were just normal melatonin. But now that I've tried these, I love them so much better than the regular version! Helps me sleep better through the night. No taste, love this brand of Source Naturals.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 17, 2025
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