65 305e Fuel Pump Question

[Ed Snyder]

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.

[AZKen]

Originally Posted by Funky61

Look under the passenger side seat area (under the truck, inside frame rail, to see if you have one of these canister filters.

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.

[LEWISMATKIN]

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.

[AZKen]

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.

[ronn]

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

[LEWISMATKIN]

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

[snazzypig]

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

[LEWISMATKIN]

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