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GMC V6 and V12 Engines Engine repair and rebuilding

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  #21  
Old June 25th, 2019, 10:51 PM
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Default 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.
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  #22  
Old June 26th, 2019, 01:11 AM
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Default Re: 65 305e Fuel Pump Question

Quote:
Originally Posted by Funky61 View Post
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.
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  #23  
Old June 26th, 2019, 02:45 AM
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Default 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.
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  #24  
Old June 26th, 2019, 04:49 AM
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Default 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.
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  #25  
Old July 8th, 2019, 01:32 AM
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Default Re: 65 305e Fuel Pump Question

Just installed this weekend, Precision #M20021; fits as advertised!
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  #26  
Old December 3rd, 2019, 02:51 AM
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Default 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.
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  #27  
Old December 3rd, 2019, 05:44 PM
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Default Re: 65 305e Fuel Pump Question

Lewis, Just to avoid any confusion, wasn't the 60-65 fuel pump #4754?
Thanks.
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  #28  
Old December 4th, 2019, 01:30 AM
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Default Re: 65 305e Fuel Pump Question

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