OIL COOLER LINES - Check yours now! Urgent 2019 owners

[clowe1243]

Joining the club, mine just started (or atleast was noticed).  Thanks to this post, I was a little more relieved it wasn't just me (Out of warranty a while now).  The cover that is under it caught oil for quite a bit.  If it wasn't for for removing the cover while inspecting my lifts bolt, would have never noticed.  No burning oil, no drips in my parking spots.  My best guess is it was so little, I never caught low oil on the dip stick.

Google and the recall in cold climates tells me its weather related; couple cold years in DMV recently.  2019 6.2L with 55k miles.  Besides going custom AN hoses and fittings, and even aftermarket oil cooler, cant find an upgrade.  It is what it is, 7 years is this is my only issue thus far, I'll take it.

Still don't understand why they want to drop the coolant hose for the swap.  But my replacement will be here tomorrow, I'm sure I will figure it out why...lol.

[66ss3964spd]

Also in the DMV, but haven't noticed anything on mine. But mine is a '23 and has just under 27K miles on it so maybe I have time. Regardless, I'll have a look at them in the next week or two.

 

Let us know how your swap out goes.

[clowe1243]

On 3/17/2026 at 11:35 AM, 66ss3964spd said:

Also in the DMV, but haven't noticed anything on mine. But mine is a '23 and has just under 27K miles on it so maybe I have time. Regardless, I'll have a look at them in the next week or two.

 

Let us know how your swap out goes.

Swap went well.  But I know now why they want to lower coolant hose and radiator fans removed.  It was a pita routing them the correct way.  Thanks to the lift, the front diff wasn't in the way much at all.  Took about 4 hours of swapping position between under the hood, under the truck, and inside the fender, over and over again.  If this happens again, I will be doing AN lines at the rubber hoses.

Edited March 25 by clowe1243

[richard wysong]

it will happen again, I went through 4 sets over the life of my 98 K2500, less than 200k when I wore it out and scrapped it. Gm parts everytime

[66ss3964spd]

18 hours ago, clowe1243 said:

Took about 4 hours of swapping position between under the hood, under the truck, and inside the fender, over and over again.

Well that sounds like approximately zero fun, especially if one doesn't have access to a lift.

 

Curious, though, that you mention the transfer case. I'd have thought the engine, and even trans, cooler lines would be well forward of the transfer case.

[richard wysong]

I bet he meant the front differential

[clowe1243]

On 3/24/2026 at 12:24 PM, 66ss3964spd said:

Well that sounds like approximately zero fun, especially if one doesn't have access to a lift.

 

Curious, though, that you mention the transfer case. I'd have thought the engine, and even trans, cooler lines would be well forward of the transfer case.

 

On 3/24/2026 at 1:18 PM, richard wysong said:

I bet he meant the front differential

 I meant front diff...smh...lol