BREAKING: GM is officially recalling the L87

[nomech]

Having trouble signing into the GM website. I have been regularly checking the status of the recall for my Yukon and haven't had any trouble logging in until this morning. Now I keep getting an error message when I attempt to log-in. Is this happening for anyone else?

I can login, but then I see this

Unable to Connect

We're having trouble loading your products right now. Check your connection, wait a moment, and then try again.

 

[jfoj]

Again, a lot of letters, without answering my question. What do you measure if there is no sensor?))) the weather on Mars? You wrote a whole story here about how and what the oil temperature changes depending on the engine load))) and there is no oil temperature sensor.

Vladimir,

I answered your question multiple times.

I guess you must need to translate, I am sure your English is better than my Russian, but you need to understand this.

Very simple, the L84 and L87 have a COMBINED Oil Pressure/Oil Temperature Sensor. I believe this may have been added due to DFM on these engines.

See link included below.

Why do you feel these engines DO NOT have an oil temperature sensor? Is this because you are using some lower priced OBDII scan tool that does not support the Expanded/Enhanced dataset?? and indicates there is no Oil Temperature or it is somehow calculated? You cannot rely on some scan tool to determine what is or is not included as a sensor or parameter in a vehicles data stream. I have had to have long conversions with scan tool vendors about problems with their software, this is nothing new, I have been doing this for years!

Kind of like you claimed the DFM does not function in Tow Mode, it does, but I guess you are trying to figure out this by using your OBDII tool?

One of the reasons I explain a lot in detail is to not only answer someone's question, but also to EDUCATE others that may be viewing a topic or thread. Understand that I actually have more years automotive experience than you have had birthdays. I made my living, and a pretty good one at that, working in the automotive industry for many years. I have worked in shops, for manufacturers, for myself, as a consultant and was ASE Certified as a Master Automotive Technician for many years as well. Had to take multiple ASE Recertification's over the years.

I posted the part number in an earlier reply to you about this subject, I will post it AGAIN.

Please see this part in the link below:

Combined Oil Pressure/Oil Temperature Sensor for the L84/L87 Engines

Do you not believe a GM parts database??

What will it take to convince you that your vehicle has an Oil Temperature sensor?

Are you aware that the 2025 models or at least some of the 2025 models now display or offer a gauge that displays Engine Oil Temperature? Unfortunately I have no idea why GM did not provide Engine Oil Temperature on pre-2025 models and I have no idea why GM only provided vague bar graph values for pre-2025 models with no numeric readout for the gauges they did display. The 2025 models include a bar graph along with a numerical readout for things like Engine Coolant Temperature, Engine Oil Pressure and Engine Oil Temperature. On pre-2025 models only the Transmission Fluid temperature was a numeric readout. This is all based on my experience with the Yukons, maybe this is different for some of the Chevrolets or the 2500+ series trucks.

 

[Vladimir2306]

Vladimir,

I answered your question multiple times.

I guess you must need to translate, I am sure your English is better than my Russian, but you need to understand this.

Very simple, the L84 and L87 have a COMBINED Oil Pressure/Oil Temperature Sensor. I believe this may have been added due to DFM on these engines.

See link included below.

Why do you feel these engines DO NOT have an oil temperature sensor? Is this because you are using some lower priced OBDII scan tool that does not support the Expanded/Enhanced dataset?? and indicates there is no Oil Temperature or it is somehow calculated? You cannot rely on some scan tool to determine what is or is not included as a sensor or parameter in a vehicles data stream. I have had to have long conversions with scan tool vendors about problems with their software, this is nothing new, I have been doing this for years!

Kind of like you claimed the DFM does not function in Tow Mode, it does, but I guess you are trying to figure out this by using your OBDII tool?

One of the reasons I explain a lot in detail is to not only answer someone's question, but also to EDUCATE others that may be viewing a topic or thread. Understand that I actually have more years automotive experience than you have had birthdays. I made my living, and a pretty good one at that, working in the automotive industry for many years. I have worked in shops, for manufacturers, for myself, as a consultant and was ASE Certified as a Master Automotive Technician for many years as well. Had to take multiple ASE Recertification's over the years.

I posted the part number in an earlier reply to you about this subject, I will post it AGAIN.

Please see this part in the link below:

Combined Oil Pressure/Oil Temperature Sensor for the L84/L87 Engines

Do you not believe a GM parts database??

What will it take to convince you that your vehicle has an Oil Temperature sensor?

Are you aware that the 2025 models or at least some of the 2025 models now display or offer a gauge that displays Engine Oil Temperature? Unfortunately I have no idea why GM did not provide Engine Oil Temperature on pre-2025 models and I have no idea why GM only provided vague bar graph values for pre-2025 models with no numeric readout for the gauges they did display. The 2025 models include a bar graph along with a numerical readout for things like Engine Coolant Temperature, Engine Oil Pressure and Engine Oil Temperature. On pre-2025 models only the Transmission Fluid temperature was a numeric readout. This is all based on my experience with the Yukons, maybe this is different for some of the Chevrolets or the 2500+ series trucks.

I have provided a photo from a laptop where the official GM diagnostic program is located. This shows that the readings of the oil temperature sensor are calculated, and not the data from the physical sensor

 

[jfoj]

I have provided a photo from a laptop where the official GM diagnostic program is located. This shows that the readings of the oil temperature sensor are calculated, and not the data from the physical sensor

I have no idea what to tell you.

I have multiple tools that display the Oil Temperature for the L87 and they have been cross checked on 2 different 2025 models that display the oil temperature and the values match between my tools at what the vehicle displays. I cross checked my tools on the 2025 model because it actually will display the Oil Temperature. I assume the 2021-2024 models do not display Oil Temperature as my 2024 Yukon does not display the Oil Temp on the dash, but I can pull the data from the connector under the dash. As I mentioned the 2 function sensor is new for the L84 and L87. It may be used on other newer engines, but I have not dug deep to see every platform that uses a 2 function sensor.

It is possible there is just a "bug" in the software that you have access to and for some reason what is displayed is "Calculated" because there is a problem with the syntax or the calculation behind the interface?? Possibly the software is not properly updated from the prior L83/L86 platform that did not have the 2 function sensor.

This is where people fall down the in the well hole. They believe the software or the "Specs" without doing a deep dive and cross checking things.

Seems if this is "Official" GM software, someone needs to contact support and get it sorted out.

EDIT UPDATE, I went back and looked closely at the header in your picture of the software, you do not have "Official" GM software, what you are using is HP Tuners VCM software which is pretty much a hack software. It is reverse engineered and likely the software developers have not sorted out the entire dataset for the L87. Maybe they did a PID scan and they have not spend the Annual $50,000 USD licensing fee for the official GM dataset.

Additionally if there is another brand tool that is updated use it to pull the data. Tools like Snap On, Autel, Launch and some others should display the data if the tool is up to date.

I find bugs and problems in software all the time and depending on the situation, I will contact the supplier and outline the issue and request a fix. I have been doing this for years and years. Nothing new in the software and automotive tool world.

If is not uncommon for me to be very skeptical with any software tool, I usually try to compare the tool with other tools to verify readings, especially readings that seem out of line. And based on the HP Tuners VCM suite that is being used, if I had purchased or licensed this software, I would be all over the vendor like flies on a cowpie in a hot field in the sun to fix their software.

I am not a very nice or patient person when I pay for something and get told things like "this is normal". I am hounding Autel at the moment for something stupid they did and they keep telling me it is "normal". They are so foolish they cannot understand how big of a problem they have on their hands. This is not my first trip down this trail.

 

[ArcherAve]

So if you spent 80-120k for a vehicle then you should have shopped around unless you got an Escalade cause my dealership has NEVER had an 80K 6.2 truck. Loss of propulsion is not gonna get you killed unless you are driving some insane speed or driving like speed racer.

Loss of propulsion can easily result in serious injuries/fatalities with even the most skilled driver on a highway. You can't control what happens behind you.

 

[JTGZ71]

I can login, but then I see this

Unable to Connect

We're having trouble loading your products right now. Check your connection, wait a moment, and then try again.

I was able to login with no issues this afternoon. When I pull up the recall info, it still shows "Incomplete. Remedy not available."