I know this topic has probably been beat to death but I have

been debating for awhile on whether to install dual filtration on my 01 duramax and possibly a lift pump or just leaving It alone. I just invested good amount of money into replacing injectors and want to protect my investment since I plan on keeping the truck for awhile.

Adding a second fuel filter has too restrict fuel flow somewhat and I would think this might shorten the life of the fuel pump. Maybe a lift pump might solve any issue with fuel restriction maybe it's not something to worry about.

The mechanic who installed my injectors said I would get better filtration without a lift pump because fuel is being pulled rather than pushed through the filter, but that I may get some more life out of the fuel pump.

Any good info would be appreciated