2011-2016 6.6L LML Duramax LGH Indirect 9th Injector Alliant AP63592

The Alliant Power AP63592 is a new indirect 9th injector for 2011–2016 GM LML/LGH Duramax applications. Alliant’s Hydrocarbon Injector supports the related engine system by restoring fit, function, and serviceability.

Features & Benefits

New Alliant Power Indirect 9th Injector (Alliant P/N AP63592)
Fit, form, and function tested to meet or exceed original-equipment standards (per Alliant Power)
Direct replacement for 12661071 / 19421482
Backed by Alliant Power’s 36-month, unlimited-mileage warranty

Application

Chevrolet Silverado 2500 HD / Silverado 3500 HD (2011–2016)
GMC Sierra 2500 HD / Sierra 3500 HD (2011–2016)
Chevrolet Express 2500 / Express 3500 / Express 4500 (2010–2016)
GMC Savana 2500 / Savana 3500 / Savana 4500 (2010–2016)

Always verify fitment against your VIN, engine, and OE part number before ordering.

Cross-Reference / Replaces

General Motors: 12661071, 19421482
Alliant Power: AP63592

Warranty: Alliant Power’s published warranty policy (rev. Aug 2025) covers new fuel injectors for 36 months with unlimited miles, parts & labor.[...]