Oil Cooler lines

Cheekster96 · January 27

2022 2500HD gasser...Big Red.

Howdy all.

Found a small oil leak coming from one of the oil cooling lines on Big Red. Came out to the garage the other day and saw a little oil puddle below the truck.

Are these cooler lines one piece? Looks like a joint connecting lines together. I found no leak at the cooler and felt no leak coming from the rad. It would seem odd that they would be two connected lines vs a single line.

In any case...needs to be addressed. Warranty should cover this, correct? '22 with 13K miles.

Any thoughts?

Lee

Another JR · January 28

Several people here have reported this issue on these trucks. It’s not a new issue for GM. It certainly would be covered if you are in the initial 3 year 36k phase of the warranty. I don’t know if they would cover it under the subsequent powertrain warranty. Have your dealer check to see if there is a TSB on it - there might be an additional warranty for it.

Another JR · January 28

Forgot to answer your first question. Yes they are an assembly you buy as one part. The lines I’m familiar with have a metal section at each end and a flex hose in the middle. They eventually leak at the swaged connection between the hose and the hard line. I’m on my fourth set of oil cooler lines on my 93 K2500. The OEM parts last longer than cheaper aftermarket ones.

Edited January 28 by Another JR

Cheekster96 · January 28

Great info...thanks!

I went to the NHTA site and entered my vin and got 0 hits. Was trying to find any TSBs on it.

I'll give the dealer a call tomorrow.

Where would I find a parts diagram for this hose and/or oil cooler and lines?

Thanks again.

Lee

Another JR · January 28

There may be better sources, but I usually just get on gmpartsdirect.com, enter my truck configuration, and search by my best guess at the part name. It usually works. Then once I have a part number I do an internet search on that to see multiple sources and sometimes even hits on tutorials for replacement.