[Dirk13]

Do as you please. I don’t own one my good buddy is the lead diesel mechanic at a dealership and I was talking to him about the Cadillac Escalade in the 3.0 diesel for my family and he said don’t do it. That 3.0 is nothing but problems. Said they had several whole motor replacements and that they are very problematic. He also said they will not be making the 3.0 any longer. I’ll assume the 2022 will be the last run. I don’t follow the inline 6 but I do know a few people with them. Most not all of those people have had nothing but issues. I don’t know if it’s the engine itself or all the”clean diesel” parts. I was just sharing the intel.

Must be something in the water over there. Not everyone has problems with 3.0 and I have not read on any forum about one single motor replacement.

The LM2 is not being discontinued. If someone told you that then they misinterpreted the memo that stated it was temporarily not available to order. All you have to do is go look at chevy/gmc website as they still advertise it. They paused it temporarily due to the supply chain issues that are affecting everything.

 

[tdhanses]

Do as you please. I don’t own one my good buddy is the lead diesel mechanic at a dealership and I was talking to him about the Cadillac Escalade in the 3.0 diesel for my family and he said don’t do it. That 3.0 is nothing but problems. Said they had several whole motor replacements and that they are very problematic. He also said they will not be making the 3.0 any longer. I’ll assume the 2022 will be the last run. I don’t follow the inline 6 but I do know a few people with them. Most not all of those people have had nothing but issues. I don’t know if it’s the engine itself or all the”clean diesel” parts. I was just sharing the intel.

They aren’t allowing you to order it currently as there is a parts supply issue, it hasn’t been dropped and is on the 2022 engine list, so he must of misread the press release from GM.

Have to say I’m glad I don’t know you, mine has been flawless in 19k mikes 😁 just kidding with you.

 

[Zuni]

Adding to the list of trucks afflicted by this. 8600 miles, 2020 Silverado RST blew its rear main, same warnings reduced performance shortly followed by oil pressure warning. Dealer said about a week to fix. Here is my concern and question to others: Did you manage to get anything changed re: the warranty? Mine was bone dry when I got off the four lane highway I was on, so it ran at least for a few minutes probably with no oil in it. Last thing I want is an engine grenading after the powertrain warranty goes out

 

[redwngr]

Powertrain is 100,000 miles so you've got a little over 90,000 miles (145,000 km) to decide if you want to run it after the warranty expires.

 

[Sevarg]

My rear main went out 4 weeks ago. Just over 13,000. Took the dealer four weeks to repair; supply chain issues. Has to be a design flaw issue. Will GM correct and are we looking at more of the same going forward? Also, a friend has a GMC with the same motor. Saw a Facebook post of his 4 days ago. Same issue, less than 8000 miles. This is not good.

 

[Dirk13]

My rear main went out 4 weeks ago. Just over 13,000. Took the dealer four weeks to repair; supply chain issues. Has to be a design flaw issue. Will GM correct and are we looking at more of the same going forward? Also, a friend has a GMC with the same motor. Saw a Facebook post of his 4 days ago. Same issue, less than 8000 miles. This is not good.

Could be poor quality parts, poor machining, improper installation, or some kind of design deficiency. I think the TSB indicated improper install, damaging the seal. You’re not likely to ever get the full and complete story.

While this issue is major, I think the percentage of trucks it affects is low.

 

[redwngr]

Based on the bulletin info it seems like the issue may be the way the seal was installed.

 

[TyeeCharters]

I’ve had a nightmare with my truck. After months of trying to fix oil leak, they finally think they have it down to a oil galley plug. This will be the 4th time rear main seal has been replaced, I guess the plug is behind the seal. Thought I’d share, as this seems to be another possible source of the dreaded oil leaks with the new LM2.

 

[BOWTIE67]

I’ve had a nightmare with my truck. After months of trying to fix oil leak, they finally think they have it down to a oil galley plug. This will be the 4th time rear main seal has been replaced, I guess the plug is behind the seal. Thought I’d share, as this seems to be another possible source of the dreaded oil leaks with the new LM2.

Just know for the 4th time for the same fix qualifies you for the lemon law in most states i believe. FYI. Not that you want to take that road but you sound pretty frustrated.

 

[TyeeCharters]

Just know for the 4th time for the same fix qualifies you for the lemon law in most states i believe. FYI. Not that you want to take that road but you sound pretty frustrated.

Yes it’s been a rough go with this truck for me. I guess this current fix attempt will be a deciding factor. It’s well into Washington lemon law, but hoping a resolution works with GM. Waiting on a 1$ part, to put the transmission back in and re test for leaks.

 

[BOWTIE67]

Yes it’s been a rough go with this truck for me. I guess this current fix attempt will be a deciding factor. It’s well into Washington lemon law, but hoping a resolution works with GM. Waiting on a 1$ part, to put the transmission back in and re test for leaks.

Good luck. I hope it works out for you which ever way you choose in the end.

 

[STILLNOTRUCK]

I'm reluctant to buy first or second year of any new engine platform, I'm surprised you did as a 40 year master tech lol

"master tech" just means he can pass a test...

 

[Avidangler]

Hi all, I have a new (I have had it 7 days) AT4 3.0 w/ a rear main seal failure at 300 miles. Had the truck 7 days. At dealer now for extensive dismantling and repairs.
Anyone else have leaks very early on with this engine? I am worried about a defect in the block machining where that seal fits.

I had an oil leak show up with about 12,000 miles, the dealership pulled the trans and transfer case to replace a seal ( that I think was a recall they didn’t tell me about) when they installed the trans they screwed up the torque converter, the snout broke off and was rattling around. They pulled trans again and rewelded the snout and installed again, took truck home and had a vibration, back to the dealership again where they decided to replace the converter, after 8 weeks of waiting for the new converter I finally have the truck back and it’s on so far. I probably left out some details but I did t want the lid thread too long !!

 

[09BLKDUALLY]

I had an oil leak show up with about 12,000 miles, the dealership pulled the trans and transfer case to replace a seal ( that I think was a recall they didn’t tell me about) when they installed the trans they screwed up the torque converter, the snout broke off and was rattling around. They pulled trans again and rewelded the snout and installed again, took truck home and had a vibration, back to the dealership again where they decided to replace the converter, after 8 weeks of waiting for the new converter I finally have the truck back and it’s on so far. I probably left out some details but I did t want the lid thread too long !!

Sounds more like a do it yourself shop not a GM dealership, I hope you don't have to take it anywhere other than oil changes in the future.

 

[Hate2looz]

Rewelded the snout on a torque converter?! I mean WTF! I would NEVER have accepted that fix. Hopefully they didn’t screw something else up in the transmission with their little ‘fix’ (this is what I would be really concerned about!)…

 

[TyeeCharters]

I had an oil leak show up with about 12,000 miles, the dealership pulled the trans and transfer case to replace a seal ( that I think was a recall they didn’t tell me about) when they installed the trans they screwed up the torque converter, the snout broke off and was rattling around. They pulled trans again and rewelded the snout and installed again, took truck home and had a vibration, back to the dealership again where they decided to replace the converter, after 8 weeks of waiting for the new converter I finally have the truck back and it’s on so far. I probably left out some details but I did t want the lid thread too long !!

I hope you have better luck than I’m having. That rear main seal job is pretty extensive in getting to it and seating properly. I had sensor issues several times following and related to the process. Now they are replacing the wire harness and more sensors. I have had issues with this truck from day one, that started with the windows humming when raised or lowered. Rear main was 4 complete attempts, and was said actually to be a oil galley plug that had failed. Every time I take the truck in, (which not including regular service is 9 times with about 6 months in total shop time in 39k miles) I ask that the truck be returned to new condition, (ie) replacing parts removed with new parts, after all it is a new truck. I’m certain the warranty work on truck has easily gotten into the 15-20k range in labor. Not to mention rental car and lost time.

 

[Steve482]

2022 AT4 LTD oil leak at 17000 KM took to dealer. 2.5 weeks replaced timing chain cover oil pan etc. They pulled cab and engine to do work. 4000 KM later oil leaking. 2.6 more weeks.. Re did, plus when talking with GM they were told to check pressure on crankcase. it was 5 times what it should be. Cause was a casting issue with turbo which caused the undo pressure, so turbo was replaced as well. Now 1500 KM after the check engine light just came on Hopefully it's something minor.... I will Say the dealer has been fantastic and provided a 2022 ATA to drive during both fixes.

 

[Hate2looz]

For you guys that are having all sorts of issues with your trucks (especially from day 1), you would think that GM would want to buy back a few of these problem child vehicles, do a deep dive into them and analyze them to see what is the cause of the constant reoccurring issues...
I mean, they expect this of OEM parts suppliers when they have issues with their parts (and it's likely possible that there is some sort of random unknown issues with components causing the problems), so IMHO GM should be analyzing these problem vehicles with the engineers to determine what the heck is actually going on. It's highly unlikely that the dealerships are actually going to solve some of these issues (ie: determine root cause).

 

[MOt4]

2020 at4 with15000 miles and it started dumping oil. Told its the rear main seal. In the shop now

 

[AS707]

My 2021 GMC Sierra 1500 AT4 3.0 Duramax started to leak oil. Took it in for oil change and they said they didn't see anything. 3 days later its leaking more oil than before. Took it in again and they said they'll look at it. The next day I stop in and they said its complicated and that I shouldn't be driving it. They don't have a loaner and GM can get me a rental being problem hasn't been diagnosed. So been paying out of pocket for rental myself. 3 weeks later after hounding GM and GM service shop they found the leak, motor cover/case is leaking. It will be a few days before fixed. I don't trust the GM service shop its in to fix it correctly being they failed to see the huge oil stains and drippings from undercarriage 2 past times when its been in for service. And the fact its taken this long to diagnose. Next GM service shop is 3-4 hours away. I've asked for a buy back if possible and just rather get a Toyota Tundra. Just the fact that I've never had an issue at Toyota service shop in my area. Owned 3 Toyota Trucks and still have 1. Also contacted a lawyer to see what can be done. I just feel the shop has been negligent and how can I continue to trust them on my truck or that any future issues may arise from this issue. My warranty is over next year and would hate to be out of luck if it persists like the others here. It's also having long crank issues. They been saying they heard anything about it and now they said they'll look into it. It's a real nice truck, just over it. Rather have a good truck with great service shop to match.