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Old 11-04-2017, 10:57 AM   #1
glenbjackson
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637 v8 1975 GMC 7500 fuel pump?????

i have a 637 v8 engine and i need a fuel pump i have looked up the motor but not much info on it. im wondering if the pump from the 478 or the 401 engine would fit? Also does anybody have a part number?

Last edited by glenbjackson; 11-04-2017 at 01:47 PM.
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Old 11-04-2017, 11:11 AM   #2
geezer#99
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Re: 637 v8 1975 GMC 7500 fuel pump?????

If anybody knows, this guy will.
http://6066gmcguy.com/
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Old 11-06-2017, 11:27 AM   #3
TJ's Chevy
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Re: 637 v8 1975 GMC 7500 fuel pump?????

X2 with Geezer....and Ebay is a great place for those And if you can find a service manual for the 637 that will supply you a part number.
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Old 11-06-2017, 04:27 PM   #4
glenbjackson
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Re: 637 v8 1975 GMC 7500 fuel pump?????

Yes i have manual, checked ebay and that site. They don't have the specific part number for the v8 that's why I'm wondering if the v6 pump will fit? I can find those pumps...the v6 part number
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