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2020 3.0 Duramax Front Crank Oil Seal Leak

Jaketab
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Jaketab Enthusiast

Jaketab

Posted
Posted

2020 3.0 Duramax with 31000 miles.  Anyone had a problem with the front oil seal leaking?  Was the repair successful?

Local dealer repaired under warranty.  Got it in time just before the 3/36 expired.

  GMC Invoice.pdf

redwngr Senior Enthusiast

redwngr

Posted
Posted

3.0 has a 100,000 mile powertrain warranty. 

 

Bumper to bumper is the same as the gas trucks

  • 5 months later...
Frictionzonekid New Member

Frictionzonekid

Posted
Posted

Currently in process of replaceing front crank seal on my 2020 LM2. 160,000km.. been leaking for about 10,000 km now.

Its a little lengthy repair due to the inability to access front crank seal with todays compact design.

Seal is not actualy leaking, rather the metal seal/assembly cover plate.

No gasket is specified from dealer, the seal/gasket is red RTV high temp silicone bead to form gasket.

 

 

IMG_20231224_115400.jpg

diyer2 Senior Enthusiast

diyer2

Posted
Posted

GM has been using silicone instead of gaskets more now. It is causing oil leaks per my son, a mechanic. 

newdude Senior Enthusiast

newdude

Posted
Posted
8 hours ago, Frictionzonekid said:

Currently in process of replaceing front crank seal on my 2020 LM2. 160,000km.. been leaking for about 10,000 km now.

Its a little lengthy repair due to the inability to access front crank seal with todays compact design.

Seal is not actualy leaking, rather the metal seal/assembly cover plate.

No gasket is specified from dealer, the seal/gasket is red RTV high temp silicone bead to form gasket.

 

 

 

 

GM uses p/n 19369831 which is ThreeBond 1217H RTV which is a gray silicone high temp.  

  • 5 weeks later...
TonyBoss Enthusiast

TonyBoss

Posted
Posted

My 2021 AT4 with the 3.0 has developed this leak at 50K. Is this covered under power train warranty? Thanks. 

  • 5 weeks later...
TonyBoss Enthusiast

TonyBoss

Posted
Posted

Took to the dealer and they fixed under warranty. Only took 4 days and I also had the transmission serviced while they had it. Worked out great. 

  • 4 months later...

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