Bosch Authorized remanufactured common rail injector for the 2011-2016 Chevrolet and GMC 6.6L Duramax LML. Rebuilt on Bosch equipment to the original build specification and end-of-line flow-tested, so the eight injectors in a set deliver within tolerance of one another instead of pulling one cylinder rich and another lean.

The LML runs the highest rail pressure of any Duramax that came before it, and it is unforgiving of a tired hole. A rough or loping idle, a hard hot start, a cylinder-balance or injector-circuit code, fuel in the oil, or a haze of white smoke on a cold morning all point here. It is also the generation most often damaged by a CP4 pump failure — if your pump let go, the injectors downstream almost never survive it, which is why we list the LML contamination kits alongside this part.

Specifications

Fits / Applications

• 2011-2016 Chevrolet Silverado 2500HD / 3500HD — 6.6L Duramax LML
• 2011-2016 GMC Sierra 2500HD / 3500HD — 6.6L Duramax LML
• 2011-2016 Chevrolet / GMC cab & chassis and van applications running the LML
• LML only — this is not the injector for LB7, LLY, LBZ or LMM. Those are separate part numbers and we list all four.
• Eight injectors per engine — the Duramax is a V8, so a full replacement is a set of eight

Part Numbers & Cross Reference

Bosch 0986435410  ·  GM 12661212 / 12639277  ·  Alliant Power reference BOS8676

Original-equipment numbers on these platforms change with engine serial, model year and emissions tier, so we do not publish a blanket interchange list that might send you the wrong part. Send us your engine serial number or VIN and we will confirm the exact match against your build before anything ships — that check is free and takes a few minutes.

Why Buy From Valley Fuel Injection

We are a diesel fuel-injection and turbocharger shop in Woodland, CA — rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. When you call, you talk to the people who test these units. We verify fitment against your engine serial, VIN or build date before anything ships, so the right part arrives the first time.

Not sure the injectors are the problem? We flow-test and diagnose injector complaints in-house — see our injector testing service before you buy a full set.