Accessing the GM OLM PID with a scantool

[brianl703]

Has anyone done this, specically with Alex Peper's OBD2 Vehicle Explorer?

My mom's 2004 Malibu Classic does not have the GM OLM..at least there is no dashboard indicator or reset switch for it..but I wonder if the ECU still supports the "oil life remaining" PID and if it could be accessed with a scantool, and if it's still counting down...

I might just have to bring my notebook PC down there and try it..

 

[Al]

I don't think its a displayed value..but I could be wrong. I put it on my sons 2000 GrandAm and don't recall that value. I do have the enhanced version of GM on my ScanTool.

 

[brianl703]

Alex Peper's website says that it supports the "Oil Life Remaining" PID enhanced GM data item.

I'm going to try pulling that data this weekend, I'll summarize the results in this thread.

 

[SPITMAN]

Check your user's manual. Some of the GM vehicles from that area have the OLM expressed as a percentage remaining as one of the functions of the odometer (eg: as you step through the settings by pressing on the odometer control stalk on the display you will display total distance, trip A, trip B, OLM).

 

[Starbreaker666]

Being it's a '04 im sure it has the OLM... Just not the DIC(Drivers Info Center). My '04 monte just lets you kow when to change but does not have the DIC unfortunatly.

 

[TomJones76]

brianl703:
4 miles to work is severe under most carmaker's definitions. "Most drives are under 10 minutes" is pretty common boilerplate.

 

[brianl703]

Ford states that is only considered severe "when outside temperatures remain below freezing".

GM says something like "especially when temperatures are below freezing".

So I'm pretty sure that's severe in winter, not so sure about summer.

 

[brianl703]

I checked the user's manual, it says nothing about the OLM. I too would have expected it to be in the odometer display, but I get "trip" and "total distance" as I push the button on the display, that's it.

It has the same instrument cluster as the 2003-previous Malibu (which, as far as I can tell, did not come with the OLM either) and so what I think is that the instrument cluster does not have the ability to display the OLM, but the function is still enabled in the PCM and can be accessed with a scantool. Of course, if it is, I still have to figure out how to reset it...

 

[brianl703]

The reason I'm wondering about the OLM is that the car is generally only driven 4 miles to work and 4 miles back home again, and I'm not sure if that's considered "severe" or not, so I'd like to see what the OLM says. Maybe I should just get an oil analysis done..

 

[brianl703]

The GM OLM PID *is* accessible with Alex Peper's OBD2 Vehicle Explorer and does exist on the 2004 Chevrolet Malibu Classic.

When I checked it today, it was at 0.5% oil life remaining, which apparently really means 0% oil life remaining.

I'd considered the problem of how to reset it. Because this car doesn't "officially" have the GM OLM, no provision had been made to reset it: The button to push in the fusebox wasn't there, the trip odometer didn't support anything having to do with the OLM...using the radio to reset it like some GM cars do? Forget it, the base-model radio isn't that sophisticated and even if it were the uplevel radio it probably still couldn't do it.

So I used Google to search for "GM OLM RESET" and found, in an article on http://www.gmtechlink.com a method that GM suggests for some models:

Turn the ignition to on without starting the engine, then push the accelerator pedal to the floor 3 times within 5 seconds.

I reasoned that this would most likely work, as the accelerator pedal is connected directly to the PCM wherin resides the GM OLM software and all of the other methods seem to go through the body control module first.

So I tried it. It took a couple of tries, apparently if you go too fast it won't register and won't reset the OLM. Or maybe it needs more than 3 times..either way, I got it to reset by pushing the gas pedal to the floor several times.

When it did reset the OLM, it went to 100.5% oil life remaining. I have no idea why it always adds .5% to the oil life remaining.

I'm going to check it again in a couple of weeks and see how much it's dropped. That'll give me an idea of just how severe my mom's driving really is.