DmaxStore Fuel Filter Adapter CAT Donaldson Upgrade 2017-2026 L5P & 2020-2026 LM2/LZ0

Upgrade your fuel filtration system with this DmaxStore Fuel Filter Adapter, designed for 2017–2026 GM Duramax diesel engines, including 2017+ 6.6L L5P and 2020+ 3.0L LM2/LZ0 platforms.

This adapter replaces the factory fuel filter and allows you to run a high-efficiency CAT 2-micron filter or a Donaldson 4-micron fuel filter with water separation, providing improved filtration and enhanced fuel system protection.

Built from CNC-machined billet aluminum with a black anodized finish, this adapter installs easily in place of the factory filter—no permanent modifications required.

Build Your Kit / Select Option:
Adapter Only (No Filter)
Adapter + CAT 1R-0750 (2-Micron Filter)
Adapter + Donaldson P553203 (4-Micron Filter/Water Separator)

Features & Benefits:
- Machined in the USA
- Black anodized finish for corrosion resistance
- Engraved with replacement filter part numbers for easy servicing
- Compatible with stock trucks — no tuning required
- Includes installation socket tool (36mm or 1/2" drive compatible)
- Direct replacement for factory paper-style fuel filter
- Helps prevent filter collapse and potential fuel system damage
- Maintains proper fuel flow across PTC heater (cold weather performance)

Compatible Filters:
- CAT 1R-0750 (2-Micron Fuel Filter)
- Donaldson P553203 (4-Micron Fuel Filter / Water Separator)

Important Notes (Read Before Purchasing):
- CAT 1R-0750 does NOT include water separation
- Recommended to run with a lift pump system (FASS / AirDog)
- Designed to maintain proper fuel heating function in cold weather

Fitment Applications:
2017–2026 Silverado/Sierra 2500HD / 3500HD 6.6L L5P Duramax
2020-2026 GM 1500 Trucks & SUV's 3.0L LM2 / LZ0 Duramax