Question on 6.2L Engine tests

[ruise]

Hello, I have a 2024 Yukon Denali with 11K miles on it. I have had ZERO problems with my vehicle. By the way, this is my 7th Yukon; I really enjoy this vehicle.

I have been reading some of the posts on engine failure and some mention "passing or failing the test," so I am asking what tests should I ask my service department to perform?? Also, I am just about due for a second oil change. What oil should I make sure they are using?

Any and all assistance will be greatly appreciated.

 

[Doubeleive]

the gold standard 5/30 (used worldwide), you can order a oil fill cap to note the same.
Still might not save you, it's a roll of the dice

 

[ReaperHWK]

Yours looks like it’s a recall vehicle; the dealer has a TSB for the test. Give them a call.

 

[ruise]

When I enter my VIN number into the GM website, it states "No active recalls" Should I still ask them about my engine when I take it in for the oil change?

 

[ReaperHWK]

When I enter my VIN number into the GM website, it states "No active recalls" Should I still ask them about my engine when I take it in for the oil change?

I was under the assumption that all 2024 6.2 were under recall; however there could be a build date cutoff. I would still ask if I were you…..

 

[ruise]

I was under the assumption that all 2024 6.2 were under recall; however there could be a build date cutoff. I would still ask if I were you…..

Yes, I will. Thanks so much!! BTW, mine was special ordered and built in September of '24.

 

[BacDoc]

Think you’re are past the cut off date.

I changed the oil in my Tahoe at 1k miles, 4k miles and then at 7k so I had 3 oil changes before my truck hit 11k miles.
Some might say that is excessive but I know it doesn’t hurt to do frequent oil changes.

You are still under warranty and you should just take it to the dealer and have them change the oil.
What they use will not void warranty although many of us prefer using 5-30W or the 0-40W if your truck “passed” the pico test.

Also good advice is to change the oil at 3k to 4k miles and don’t even wait until OLM tells you to.

 

[GMCnewbee]

The test is called a PICO Test. If your vehicle falls under the recall your Dealer should know and will perform the test at no charge. If you pass the test you will be given an oil and filter change and switched to 0W-40 oil. If you do not pass the test .....

 

[ruise]

The test is called a PICO Test. If your vehicle falls under the recall your Dealer should know and will perform the test at no charge. If you pass the test you will be given an oil and filter change and switched to 0W-40 oil. If you do not pass the test .....

Thank you!

 

[ruise]

I just spoke with both the General Manager of my local dealership and the service department to confirm that my engine is NOT on the recall list. Should I still be worried???

 

[Fless]

No. It doesn't look like you're putting that many miles on it, and you have a long time of warranty yet. Drive it and enjoy it.

 

[tsuintx]

No. It doesn't look like you're putting that many miles on it, and you have a long time of warranty yet. Drive it and enjoy it.

This.

 

[DontTaseMeBro]

I was under the assumption that all 2024 6.2 were under recall; however there could be a build date cutoff. I would still ask if I were you…..

Yes, there is a date cut off. May 31st of 2024.

 

[sorrentino]

Thank you!

If your engine passes the test you get a 10 year, 100,000 mile warranty on your engine. You can see the new warranty on your Chev app. I consider that a real piece of mind. Never-the-less, to stay on top of things, I do change my oil every 3500 miles and see a sample to Blackstone labs for analysis.

 

[ruise]

If your engine passes the test you get a 10 year, 100,000 mile warranty on your engine. You can see the new warranty on your Chev app. I consider that a real piece of mind. Never-the-less, to stay on top of things, I do change my oil every 3500 miles and see a sample to Blackstone labs for analysis.

Thanks @sorrentino. What are they looking for in the oil sample?? So, you're saying that if they did the PICO test on my engine (even though it is not on the recall list) and it passes, I will get 10 year, 100,000 miles on it???

 

[KMeloney]

Thanks @sorrentino. What are they looking for in the oil sample?? So, you're saying that if they did the PICO test on my engine (even though it is not on the recall list) and it passes, I will get 10 year, 100,000 miles on it???

If your VIN is not on the list, then the engine was built after the cut-off date [for the recall], and GM believes that your engine is not in danger of failing (and therefore won't perform the PICO test). So, that test wasn't and won't be performed.

That said, some '24 (outside of the window) and '25 6.2s are rumored to have failed. And, engines that have passed the PICO test have also failed. You just have to hope that we're in the majority of owners whose engines don't fail.

 

[Fless]

Thanks @sorrentino. What are they looking for in the oil sample?? So, you're saying that if they did the PICO test on my engine (even though it is not on the recall list) and it passes, I will get 10 year, 100,000 miles on it???

They wouldn't perform the PICO test on an engine that's outside of the recall window. And for those engines in the recall that pass the PICO test the extended warranty is NOT on the entire engine.

 

[schmit55]

If your VIN is not on the list, then the engine was built after the cut-off date [for the recall], and GM believes that your engine is not in danger of failing (and therefore won't perform the PICO test). So, that test wasn't and won't be performed.

That said, some '24 (outside of the window) and '25 6.2s are rumored to have failed. And, engines that have passed the PICO test have also failed. You just have to hope that we're in the majority of owners whose engines don't fail.

25s and 26s are failing just as often

 

[Fless]

25s and 26s are failing just as often

Do you have a source for this info?

 

[blanchard7684]

Thanks @sorrentino. What are they looking for in the oil sample?? So, you're saying that if they did the PICO test on my engine (even though it is not on the recall list) and it passes, I will get 10 year, 100,000 miles on it???

Oil analysis is easy to do.

It will show if metallic debris is increasing, decreasing, or holding steady. It is a good health check.

It also shows the condition of the oil itself. Additive concentrations, viscosity, fuel dilution, oxidation level.

It is wise to move to a more aggressive maintenance schedule in the engine oil. Going at or before 5000 miles will really help that 6.2. And also moving up at least one viscosity grade to 5w30. ( obviously use a full synthetic. Not a blend. Not something with group iii mineral oil. Full pao base oil and a dexos certificate)

Many here recommend the 0w40. The 6.2 puts a large load at low rpm on connecting rod bearings. This is the realm of needing higher oil viscosity.

Some people have reservations about using a viscosity grade that isn’t specified. Worries over warranty denial etc. predominate. It is understandable. If you are using a good synthetic oil and changing it on a very aggressive schedule ( 3k to 4k) and using full synthetic oil you are still going to improve your odds greatly. There are vanishingly small numbers of people who have “enthusiast” levels of vehicle maintenance and also experienced bearing failure. That Venn diagram is very very small.

Other items: get an anti-dfm system from Carbyte or range. In meantime drive in L9– it shuts off dfm altogether. This will keep lifters from experiencing the dfm dance. ( keeping the oil clean will also aide in minimizing lifter failure.) The lifters are another sensitive area on these engines.

And also get a catch can. Direct injection systems get the intake ports real dirty real quick. This can lead to oil consumption, , oil degradation, and poor performance. If bad enough the valves can get stuck and cause a lifter failure . These are super cheap and easy to install. My 10 yr old did mine with my supervision.

Lastly commit to running a bottle or two of Techron every oil change cycle. This will also help keep the combustion chamber clean.

It is true irony that despite all the tech advancement in these engines, you have to revert to a 1970’s maintenance schedule.

The oem maintenance schedule is not designed to maximize engine life.

It is designed to minimize “life cycle costs” over a specified vehicle life span usually 150,000 to 175,000 miles. It’s the absolute minimum of maintenance needed to get the vehicle to 150,000-175,000 miles. It is a good starting guide.