Merchant Automotive 10815 Lower Radiator Pipe O-Ring (At Radiator) (2011-2016 6.6L Duramax)
Fits: Chevrolet • GMC
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By ordering the Merchant Automotive 10815 Lower Radiator Pipe O-Ring (At Radiator) (2011-2016 6.6L Duramax) you will earn 8 DIESEL DOLLARS in your SDS Fuel Tank!
The Merchant Automotive 10815 Lower Radiator Pipe O-Ring is an OE-style seal that fits in the lower radiator hose where it connects to the radiator on 2011-2016 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L LML Duramax. A leak at that joint is commonly just this seal, not the whole hose.
Fitment
Fits 2011-2016 GM 6.6L LML Duramax trucks: Chevrolet Silverado 2500HD and 3500HD and GMC Sierra 2500HD and 3500HD. It goes at one spot, the lower hose connection at the radiator, which is the At Radiator in the product name. It is not listed for the earlier LB7, LLY, LBZ or LMM engines or for the 2017-and-newer L5P. Verify fitment by VIN or call us before you order, and see the rest of our Duramax parts if you are already into the cooling system.
Why this part
When coolant shows up at the lower radiator connection, it is easy to assume the hose has failed and order a complete assembly. Merchant Automotive points out that a leak at this spot is commonly just the seal. The 10815 replaces that O-ring by itself, so you do not have to replace the entire hose assembly to stop the leak.
It is an OE-style replacement that maintains the factory function, so the joint goes back together the way it came from the factory. If the hose or pipe itself is damaged, that is a separate repair, but start with the seal. It is the simplest fix for this leak and often the only one the joint needs.
What you get
- Lower radiator pipe O-ring for the radiator end of the lower hose, Merchant Automotive part number 10815
- OE-style, direct-fit replacement
Features, as Merchant Automotive lists them:
- Direct-Fit Installation
- OE-Style Replacement
- High-Quality Construction
About Merchant Automotive
Merchant Automotive is a Holland, Michigan parts maker that has focused on the 6.6L Duramax and its Allison transmission since 2004. Most of their catalog targets a known weak spot on these trucks, from transfer case pump housings to fuel filter heads, instead of trying to cover every make on the road.
Frequently asked questions
Do I need a new lower radiator hose too?
Usually not. A leak at the lower hose connection to the radiator is commonly just the seal, and this O-ring fixes it without replacing the entire hose assembly. Replace the hose only if the hose itself is damaged.
Which end of the lower pipe does this go on?
The radiator end. The 10815 fits in the lower hose at the connection to the radiator.
Will it fit my 2017 L5P or 2010 LMM?
It is listed for the 2011-2016 LML only. If you have a different engine, call us with your VIN and we will check what fits.
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 10815 Lower Radiator Pipe O-Ring (At Radiator) (2011-2016 6.6L Duramax) you will earn 8 DIESEL DOLLARS in your SDS Fuel Tank!