The factory injectors in the first iteration of the Duramax engines, dubbed the LB7, had an extremely high failure rate, so much so that GM extended the warranty on the injectors after the fact. Fortunately, the original manufacturer of the injectors, Bosch, determined the root cause of the failures and rectified the issues with a revised design. If you're in need of replacing one, two, or all of your injectors, these are a genuine Bosch, brand new (not remanufactured) replacement injector. And because these truly are brand new, there is no core charge and no need to send in your original injector(s).

IMPORTANT NOTE:

• When replacing the injector(s), it is extremely important to also replace the injector line(s) to each replaced injector. It has been proven that the injector lines will contain debris, and once disassembled, will loosen any of this debris, sending it through your brand new injectors, inevitably destroying each, which will not be covered under warranty.