06/03/2026
GM L5P injector sealing issues can lead to blow-by, leaks, reduced power, and repeat repairs.
The new GM Duramax L5P Robby ProKit is engineered to restore the injector cylinder head seat fast — creating a clean, factory-spec sealing surface without valve cover removal.
✔ Restores injector seats in as little as 15 seconds
✔ Helps prevent blow-by, leaks, and performance loss
✔ Resurfaces the aluminum seat — not just loose debris
✔ Available as ProKit or ProKit Plus with injector puller
For diesel shops handling GM L5P injector replacement or seal-related issues, Robby helps get the repair right the first time.
👉 See how Robby works: https://promaxxtool.com/products/gm-dmx-l5p-duramax-l5p-fuel-injector-seal-puller-combo-kit?_pos=1&_sid=4df1ea207&_ss=r&variant=52005230969106