BREAKING: GM is officially recalling the L87

[Vladimir2306]

By the way, interesting information in this topic has been mentioned more than once about the temperature of the oil level in the engine. I have a question, where is she from? my scanner doesn't see such a sensor, and I found a screenshot that there is no physical oil temperature sensor on 6.2, and the data there is calculated.

 

[BacDoc]

Can you expand on this? Were they brief with their answers? Did they roll their eyes?

I think it is very understandable that the vehicle owners have questions and while I understand that GM dealers are likely sick of repeating themselves, they are in a service industry. You can't have everyone bring their vehicles in for service at dealer prices but not want to help those same customers when a recall exists. That's GM's problem (to make right with the dealers) the customer shouldn't have to deal with 'low morale' of the dealer. Not only that, but the customer is also not in a good spot, either.

Yes they did roll their eyes and very evasive when I asked if they had any trucks that died and are waiting on engines. Almost like a politician that never really answers the question.

This is coming from a dealership that historically has bent over backwards for customers and strives for customer service. When I first bought my 6.2l Tahoe about a year ago I asked them about issues with these vehicles and they told me they had engine failure on some in last couple years. They said it was so uncommon to see this problem and they had no trucks in the shop at that time or recently for engine failure.
This lead me to believe that the failure rate was statistically so low that I wouldn’t worry about it - that was then. Something definitely is going on.

As Lance Armstrong said when asked about his competitors in the blatant doping/EPO era - Not normal!

 

[GMCChevy]

There's been number of people here who've had bad 6.2s. It would be interesting to know but probably hard to tell now since they've been replaced how how many of those engines fall within GMs window.

 

[jfoj]

By the way, interesting information in this topic has been mentioned more than once about the temperature of the oil level in the engine. I have a question, where is she from? my scanner doesn't see such a sensor, and I found a screenshot that there is no physical oil temperature sensor on 6.2, and the data there is calculated.

It appears that the oil pressure sensor is a combined oil pressure and oil temperature sensor. While this may be useful, I was a bit shocked that the oil pressure sensor is also configured as an oil temperature sensor as well. I would think the oil temperature should be more sensed in the oil sump than at the end of an oil galley that probably does have constant flow.

Most of the oil temperature sensors that I have seen in the past were sump mounted combination oil level and oil temperature sensors. This was pretty common for BMW and other German models from my experience. Unclear if the GM oil level sensor has the ability to monitor temperature and if GM would have used the 2 sensors in combination to arrive at an oil temperature.

As for your scan tool, most standard OBDII/EOBD tools WILL NOT read the enhanced or extended sensor date. OBDII/EOBD typically does not focus on oil temperature. GM also has the highest cost to license their enhanced data set information and most cheaper tools will not pay the GM licensing fees.

To view the enhanced or extended sensor data for any make or model, you would not use the OBDII/EODB portion of the tool. You would need to choose the specific module or component you want to monitor. So the Engine module needs to be selected, then the Live data for the Engine module would then need to be displayed. While you can see a subset of Live data when choosing OBDII/EOBD, this is just a subset of standard data that OBDII/EOBD is formatted to monitor. Other data needs a more advanced tool and support for the manufacturers specific dataset.

Additionally almost all OBDII/EOBD data needs calculations to provide the data in a readable numeric form to temperature, pressure, time, speed and so forth. Almost every OBDII/EOBD PID has a formula associated with it to provide a useful data output.

GM 6.2l Oil Pressure & Temperature Sensor

 

[CorvairGeek]

It appears that the oil pressure sensor is a combined oil pressure and oil temperature sensor. While this may be useful, I was a bit shocked that the oil pressure sensor is also configured as an oil temperature sensor as well. I would think the oil temperature should be more sensed in the oil sump than at the end of an oil galley that probably does have constant flow.

Most of the oil temperature sensors that I have seen in the past were sump mounted combination oil level and oil temperature sensors. This was pretty common for BMW and other German models from my experience. Unclear if the GM oil level sensor has the ability to monitor temperature and if GM would have used the 2 sensors in combination to arrive at an oil temperature.

As for your scan tool, most standard OBDII/EOBD tools WILL NOT read the enhanced or extended sensor date. OBDII/EOBD typically does not focus on oil temperature. GM also has the highest cost to license their enhanced data set information and most cheaper tools will not pay the GM licensing fees.

To view the enhanced or extended sensor data for any make or model, you would not use the OBDII/EODB portion of the tool. You would need to choose the specific module or component you want to monitor. So the Engine module needs to be selected, then the Live data for the Engine module would then need to be displayed. While you can see a subset of Live data when choosing OBDII/EOBD, this is just a subset of standard data that OBDII/EOBD is formatted to monitor. Other data needs a more advanced tool and support for the manufacturers specific dataset.

Additionally almost all OBDII/EOBD data needs calculations to provide the data in a readable numeric form to temperature, pressure, time, speed and so forth. Almost every OBDII/EOBD PID has a formula associated with it to provide a useful data output.

GM 6.2l Oil Pressure & Temperature Sensor

An odd looking one too. My 2019 L86 had the 3 wire connector sensor they used for over a decade.