Oil in Coolant Reservoir!

[Parky_Blurb9705]

Checking to see if anyone has experienced this with their Duramax. At lunch I noticed some oil behind the front driver side tire. It was all over the control arm and wheel liner. Upon further inspection I found the coolant reservoir was completely full with thick black oil. After some research online i found there is a somewhat known issue with the oil cooler cracking and causing this. My truck only has 52k miles on it so its under warranty, but I'm not sure what all an issue like this will cause down the road. Has anyone had this happen and if so, what was done to resolve it and were there any lasting issuse afterward?

 

AT4 Forum Fav 👍

KBH Center Console Lid Armrest Cover for GMC Sierra - Grab one through Amazon!

[R467X]

Yep known issue. What oil filter do you use? Is it the oem one? That oem oil filter was talked about as the usual cause for that failure.

Also are you all stock or weight loss?

The dealer solution to this is to run a cleaner through and replace all hoses, radiator, oil cooler etc. very costly.

 

[Parky_Blurb9705]

The truck has a 4" lift but is stock otherwise. OEM oil filter... Whatever the dealer installed when servicing it.

 

[R467X]

The truck has a 4" lift but is stock otherwise. OEM oil filter... Whatever the dealer installed when servicing it.

Very likely it's that OEM filter that caused it. I'll try and find the video for you to look at from a while back

 

[R467X]

 

[Parky_Blurb9705]

Much appreciated. I couldn't find any threads talking about this.

 

[Parky_Blurb9705]

Now I just got to figure out of this thing will be worth keeping or if it will be nothing but problems from here on.

 

[R467X]

I'd say keep it until the warranty is up... This isnt the 6.2 or 3.0 we are talking about ..