Can anyone give me the part # for this line? It the line that runs from the purge solenoid to the firewall, has the green smoke test cap on it. Any info would be much appreciated.

 

That's gonna be a dealer part. I highly doubt the aftermarket is going to make that. And most likely they will have to order it.

 

Is there any way of finding out the dealer part number?

 

Not too many online parts lookups that are that detailed for obscure / oddball parts. That includes online GM parts sellers / dealers.
Best bet is to go to a Chevy or GMC dealer and order it. They can have stuff in a day or two.

 

Dealer had part number, going by their part number it looks like the line in not made with the green cap now at least this one didn't have it and that was from the dealer. Thanks for your input. 12658354

 

don't know if this will help but I found this

https://www.gmpartsdirect.com/oem-pa...bC12OC1nYXM%3D

hope this helped