2011-2016 Chevy/GMC 6.6L Duramax LML & LGH Aftertreatment Fuel Injector | Alliant Power AP63592 New
This is the Alliant Power AP63592, a new aftertreatment fuel injector for the 2011 to 2016 GM 6.6L Duramax: the LML in the Chevy Silverado and GMC Sierra 2500HD and 3500HD, and the LGH in the Chevy Express and GMC Savana 2500 and 3500 vans. GM calls it the indirect fuel injector. It replaces GM 19421482 and the older 12661071 and 12636099, and it crosses to Standard Motor Products FJ1378 and Dorman 904-436. It is a direct fit for the factory emissions system, and the mating harness connector is GM 13580230. This is not one of the eight engine injectors.
This is an emissions part for the factory exhaust system. It sprays a small amount of diesel into the exhaust so the particulate filter can burn itself clean. When it sticks, leaks or clogs, regenerations fail, the soot load climbs and the truck sets exhaust aftertreatment fuel injector codes. Check the feed line, the wiring and the connector before you replace it, and fix any exhaust leak at the injector seat.
Confirm Fitment Before You Order
The 2017 and newer L5P uses a different aftertreatment injector: GM lists another part number for it, and that one is AP63593. Send us your VIN or the GM number on your old injector (19421482, 12661071 or 12636099) before you order. Send the VIN for a 2010 Express or Savana 6.6L van too: GM lists the same injector for 2010 vans with engine VIN code L, but this part is listed for 2011 to 2016. Call 530-668-0818 and we will confirm the exact match at no charge before anything ships.
Specifications
| Part number | AP63592 |
| Brand | Alliant Power |
| Condition | New, genuine, in original packaging |
| Warranty | Manufacturer’s own warranty applies. Call us and we handle the claim. |
| Type | Aftertreatment (indirect) fuel injector for the exhaust system |
| Engine | GM 6.6L Duramax V8 diesel, LML and LGH |
| Model years | 2011 to 2016 |
| Vehicles | Chevy Silverado and GMC Sierra 2500HD and 3500HD, Chevy Express and GMC Savana 2500 and 3500 |
| Replaces GM | 19421482, 12661071, 12636099 |
| Mating harness connector | GM 13580230 |
| Per vehicle | 1 |
| Shipping weight | 2 lb |
Fits / Applications
- 2011-2016 Chevrolet Silverado 2500HD and 3500HD, 6.6L Duramax LML
- 2011-2016 GMC Sierra 2500HD and 3500HD, 6.6L Duramax LML
- 2011-2016 Chevrolet Express 2500 and 3500, 6.6L Duramax LGH
- 2011-2016 GMC Savana 2500 and 3500, 6.6L Duramax LGH
- 2010 Express and Savana 6.6L vans with engine VIN code L: GM lists the same injector, confirm by VIN
- For the factory exhaust aftertreatment system. One per vehicle.
Let the exhaust cool before you start. Clean the seat in the exhaust, fit a new gasket or seal where the truck uses one, torque to the GM figures and check the fuel feed line for leaks. Clear the codes and run a service regeneration with a scan tool to confirm the repair.
Part Numbers & Cross Reference
Alliant Power AP63592 · GM 19421482 · GM, older number 12661071 · GM, older number 12636099 · Standard Motor Products FJ1378 · Dorman 904-436
Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.
Frequently Asked Questions
Which trucks does the AP63592 fit?
2011 to 2016 Chevy Silverado and GMC Sierra 2500HD and 3500HD with the 6.6L Duramax LML, and 2011 to 2016 Chevy Express and GMC Savana vans with the 6.6L Duramax LGH. For a 2010 diesel van, call 530-668-0818 with your VIN.
What GM numbers does the AP63592 replace?
GM 19421482, and the older 12661071 and 12636099 that it took over from. It also crosses to Standard Motor Products FJ1378 and Dorman 904-436.
Is this one of the engine injectors?
No. It is the single injector in the exhaust system that doses fuel for particulate filter regeneration. GM lists it as the indirect fuel injector.
Will it fit my 2017 or newer L5P?
No. GM lists a different injector for the L5P, and that one is AP63593. Call 530-668-0818 with your VIN if you are not sure which one you have.
Related Parts
- 2011-2016 Chevy/GMC 6.6L Duramax LML Fuel Injector | Bosch 0986435410 | Genuine Bosch Remanufactured
- 2011-2016 Chevy/GMC 6.6L Duramax LML Common-Rail Fuel Injector | Bosch 0445117010 New
- 2011-2016 Chevy/GMC 6.6L Duramax LML Left (Driver) Fuel Rail with Sensor | Bosch F00RL01027 New
- 2011-2016 Chevy/GMC 6.6L Duramax LML Remanufactured CP4 Injection Pump | Bosch 0986437421
- GM 6.6L Duramax LML Fuel Contamination Kit | Alliant Power AP57004 (Pump Included)
- GM 6.6L Duramax LML Fuel Contamination Kit | Alliant Power AP57004NP (No Pump)
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 test and diagnose in-house before you buy. See our common rail injector testing and rebuild service.
UPS to all 50 states, including Alaska and Hawaii. Your rate shows at checkout. Questions on fitment? Call 530-668-0818.
Pricing covers the unit itself. Any applicable sales tax is additional; shipping is calculated at checkout. Buying tax-exempt? Qualifying diesel repair shops, fleets, farms, and agricultural operations can purchase tax-free. Set up tax-exempt purchasing once and every qualifying order is tax-free going forward.
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