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**Hoytbowhunter** · 10-11-2019, 05:54 PM

Can someone tell me what this black cap is for that's missing. and where I can find it on line. Thanks for the help.
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**daniel7930** · 10-11-2019, 09:12 PM

Quote:

Originally Posted by Hoytbowhunter

Can someone tell me what this black cap is for that's missing. and where I can find it on line. Thanks for the help.
Attachment 4456141
Attachment 4456143

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Looks like the quick connect for ac

**daniel7930** · 10-11-2019, 09:14 PM

But I don’t think that is the ac.

**Eloc309** · 10-11-2019, 10:01 PM

That is the low pressure fuel test port.
Should be able to buy the plastic cap from the dealer or online.

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**impulse** · 10-11-2019, 10:15 PM

Not sure exactly what it is, but I'd bet $$$ to donuts you'd find a decent fit among this $8 assortment on Amazon. Plus a few handy spares...

https://www.amazon.com/gp/product/B07NY21H43

For me, I'd spend the $8 just to try, before I'd spend any more time chasing down parts.

**Eloc309** · 10-11-2019, 10:34 PM

Also, if that test port ever leaks you can unscrew it and cap it off with this...

https://dirtyhookerdiesel.com/i-1490...-port-cap.html

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**Hoytbowhunter** · 10-12-2019, 12:19 PM

Quote:

Originally Posted by Eloc309

That is the low pressure fuel test port.
Should be able to buy the plastic cap from the dealer or online.

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Found it at Advance auto thanks for the help.

**Eloc309** · 10-12-2019, 12:28 PM

Quote:

Originally Posted by Hoytbowhunter

Found it at Advance auto thanks for the help.

You bet!

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10-11-2019, 05:54 PM	#1
Hoytbowhunter Registered Users-pm+ Join Date: Jun 15 2016 Age: 59 Posts: 409 Rep Power: 0	2015 Duramax missing part Can someone tell me what this black cap is for that's missing. and where I can find it on line. Thanks for the help. Sent from my iPad using Tapatalk

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10-11-2019, 09:14 PM	#3
daniel7930 Registered Users-pm+ Join Date: Jun 15 2011 Location: san antonio Age: 42 Posts: 1,592 Rep Power: 9211375	But I don’t think that is the ac.

10-11-2019, 10:01 PM	#4
Eloc309 Registered Users-pm+ Join Date: Jan 16 2011 Age: 49 Posts: 318 Rep Power: 1072906	That is the low pressure fuel test port. Should be able to buy the plastic cap from the dealer or online. Sent from my iPhone using Tapatalk

10-11-2019, 10:15 PM	#5
impulse '81 Aggie Join Date: Mar 17 2010 Location: Sea Isle in Galveston, TX Age: 64 Posts: 1,527 Rep Power: 15769883	Not sure exactly what it is, but I'd bet $$$ to donuts you'd find a decent fit among this $8 assortment on Amazon. Plus a few handy spares... https://www.amazon.com/gp/product/B07NY21H43 For me, I'd spend the $8 just to try, before I'd spend any more time chasing down parts.

10-11-2019, 10:34 PM	#6
Eloc309 Registered Users-pm+ Join Date: Jan 16 2011 Age: 49 Posts: 318 Rep Power: 1072906	Also, if that test port ever leaks you can unscrew it and cap it off with this... https://dirtyhookerdiesel.com/i-1490...-port-cap.html Sent from my iPhone using Tapatalk

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