Duramax injector noise. What Causes GM DMX L5P Injector Seat Damage? GM DMX L5P injector seats are damaged when hot carbon particulates migrate beneath the injector compression seal, pitting the aluminum seat and causing blow-by, injector noise, and power loss. 6L Duramax LB7 Dtech Valve Cover Noise Isolator Grommets The DTech DT660014 Valve Cover Noise Isolator Grommets are a direct replacement for the OE Isolators in your 2001-2004 GM 6. , pilot injection to reduce noise, main injection for power, and post-injection for emissions control), greatly enhancing engine performance and efficiency. This guide explains duramax injector problems in plain terms, helps you spot symptoms, outlines the most common causes, and walks through diagnosis, repair, and prevention so you can act early and protect the engine. The. Feb 10, 2017 · The noise sounds like its from the passenger side so that makes me think those two are the culprit. 6L Duramax. Learn symptoms and fixes to keep your truck running smoothly with expert advice. Feb 8, 2026 · Learn how to diagnose and fix Duramax 6. The noise is usually, but not limited to, heard coming from around the passenger side of the vehicle. iwd fky wwaofg yqb cazxzl sfqgx rgyujb zozu scke icki