Merchant Automotive 10413 Fuel Injector Return Line Seals (2011-2016 6.6L Duramax)
Fits: Chevrolet • GMC
Diesel Dollars is Southern Diesel Supply's Loyalty Program. Purchasing with Us Earns you 1 Point for every 1 Dollar spent to use for future buys!
By ordering the Merchant Automotive 10413 Fuel Injector Return Line Seals (2011-2016 6.6L Duramax) you will earn 10 DIESEL DOLLARS in your SDS Fuel Tank!
Merchant Automotive 10413 is a set of eight fuel injector return line seals for GM trucks with the 2011-2016 6.6L LML Duramax. Any time the injector return line comes off, the seals should be replaced to avoid fuel leaks, and this kit contains 8 seals.
Fitment
These seals are listed for the 6.6L LML Duramax in 2011-2016 GM trucks. They are a direct fit for the LML return line. For a 2004.5-2010 LLY, LBZ or LMM, use the return line seals listed for those years instead; this part number is listed for the LML only. Check your engine by VIN or call us before you order.
Why this part
Return line seals are small parts with one job: keep fuel from leaking where the return line connects. Merchant Automotive's guidance is simple. Every time the fuel injector return line is removed, the seals should be replaced in order to avoid fuel leaks.
That makes this kit a part to have on the bench before you start any LML job that disturbs the return line, including injector replacement. Having the 8 seals ready means the line goes back on with fresh seals, instead of reusing old ones because the new ones were not there.
If the job is a full injector swap, browse our injectors page for the rest of the parts.
What you get
- 8 fuel injector return line seals
Features:
- Direct Fit
- Help Avoid Fuel Leaks
Manufacturer Warranty: 1 Year Limited
Installation notes
Replace the seals every time the fuel injector return line is removed. Swap them at each connection as the line goes back on rather than reusing any of the originals, and check for leaks at startup.
About Merchant Automotive
Merchant Automotive is a Holland, Michigan company founded in 2004 that builds parts for one platform: the 6.6L Duramax and the Allison transmission bolted to it. Its fuel system line runs from injector return lines and fuel hose kits to fuel filter head rebuild kits. Shop more from Merchant Automotive or see all Duramax parts.
Frequently asked questions
How many seals come in kit 10413?
The kit contains 8 seals for the LML fuel injector return line.
Do I really need new seals if the old ones look fine?
Yes. Merchant Automotive says the seals should be replaced every time the fuel injector return line is removed, in order to avoid fuel leaks. How a seal looks on the bench does not change that.
What warranty comes with these seals?
They carry a 1 Year Limited manufacturer warranty.
Questions on fitment? Call the shop at the number in the header. We install everything we sell.
Diesel Dollars is Southern Diesel Supply's Loyalty Program. Purchasing with Us Earns you 1 Point for every 1 Dollar spent to use for future buys!
By ordering the Merchant Automotive 10413 Fuel Injector Return Line Seals (2011-2016 6.6L Duramax) you will earn 10 DIESEL DOLLARS in your SDS Fuel Tank!