Once I had 3Bs part number I looked it up on rock auto and it listed the applicable trucks it would fit. it listed several chevy and gmc trucks. These are good to know when the next hard-to-find part comes along.
I found out why I did not find it in my searches. When I searched I put in the 3G truck thinking it would be the most likely candidate. However that was the one truck not listed for this hose. I pick mine up at Napa tomorrow first thing. $13 each is pretty good.
