Re: 65 305e Fuel Pump Question
 

In my 50 years of driving V6 powered GMCs, I've only experienced one fuel pump failure while driving. I credit most of that good fortune to using nothing but ethanol-free gasoline. The one failure I did have happened in stop-and-go traffic on the interstate in Seattle. Pulling onto the shoulder would have been difficult at best due to vehicles all around me. Fortunately I overcame my initial panic and remembered to flip on the toggle switch for my backup electric fuel pump. The engine restarted before I had even coasted to a stop, so I didn't even get honked at.

Thus, my recommendations -- use ethanol-free gas and install a backup electric fuel pump for emergencies.

Re: 65 305e Fuel Pump Question
 

Good idea to check for the original style filter, but remember he bypassed everything when doing the gas can trick. That is how you troubleshoot. Isolate a part so as to either eliminate it as a cause, or prove it is the cause.

Re: 65 305e Fuel Pump Question
 

fellas, the original AC-Delco fuel pump # for all 305-432 & 478 gas pumps are as follows: 1960-65 4755; 66-74 40050. This was the only two numbers we stocked at the dealership and for years afterward. I hope this helps with the identification process.:thumbsup::thumbsup::thumbsup:

Re: 65 305e Fuel Pump Question
 

Unfortunately, most, not all, A/C Delco parts are made off shore. Mostly China. Only N.O.S. will be USA. N.O.S. fuel pump can have a dried out diaphragm.

Re: 65 305e Fuel Pump Question
 

Just installed this weekend, Precision #M20021; fits as advertised!

Re: 65 305e Fuel Pump Question
 

azken, I only provided the ac/delco #'s for a reference point and where the break in production was in the pumps.

Re: 65 305e Fuel Pump Question
 

Lewis, Just to avoid any confusion, wasn't the 60-65 fuel pump #4754?
Thanks.

Re: 65 305e Fuel Pump Question
 

you are right, snazzy. I have fat-finger syndrome again.