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Old 08-12-2020, 07:36 PM   #1
eric8
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Valve cover grommet part #

Looking to find a GM nos passenger side rear valve cover grommet for a 77 C10 with factory 350. Need to know the GM part number please.
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Old 08-12-2020, 07:46 PM   #2
kwmech
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Re: Valve cover grommet part #

I've been able to get those at NAPA
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Old 08-12-2020, 07:54 PM   #3
eric8
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Re: Valve cover grommet part #

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Originally Posted by kwmech View Post
I've been able to get those at NAPA
Yeah I've just been less than impressed with the quality of anything from the parts stores. Ebay has a lot of NOS GM stuff like this but I just don't know the GM part number or nomenclature to search by.
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Old 08-12-2020, 08:33 PM   #4
bhc41051
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Re: Valve cover grommet part #

There are two listed 3994239 and 3989350.
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Old 08-12-2020, 08:38 PM   #5
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Re: Valve cover grommet part #

There are two listed 3994239 and 3989350.
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Old 08-12-2020, 08:46 PM   #6
eric8
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Re: Valve cover grommet part #

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Originally Posted by bhc41051 View Post
There are two listed 3994239 and 3989350.
Thanks! Looks like 3994239 is for the passenger side I showed in the photo. 3989350 is for the driver's side (the D shaped grommet that the pcv valve fits into). May I ask what resource you use to look up GM part numbers for our trucks?
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Old 08-12-2020, 09:55 PM   #7
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Re: Valve cover grommet part #

Thanks to forum member "hatzie" for the manuals http://67-72chevytrucks.com/vboard/s...d.php?t=545416
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