I have a 2000 Silverado Oil Life Month. It went off with 2500 miles on the odometer. I’m not sure if the OLM was reset when the oil was changed in March (Mobile Full Synthetic High Mileage). Does the OLM count miles or is it an intelligent OLM?
2000 Silverado Oil Life Monitor????
- Thread starter otis24
- Start date
It is a semi intelligent system It takes into count things such as miles driven, idle time, oil and coolant temps for example and makes it's decisions based on that. It does not test the oil itself - just takes data from sensors and makes decisions. There is a mileage limit on most that won't allow you to go over a certain mileage. My 06 Sierra seems to always recommend and oil change between 5-6500 miles. If you were to overheat bad enough the oil life will go right to 0%. As years have gone by the systems have gotten better with use of additional data points as well.
Your 2000 Silverado OLM is not just a mileage counter. It actually is an intelligent one. There are no hard limits to the OCI it will suggest based on driving conditions, but GM does say to change the oil if the light doesn't come on after a year. However, this isn't actually programmed into your car's OLM.
Reset the light by turning the key on (but not starting it) and then hit the gas pedal to the floor 3 times within 5 seconds. Some cars of that time period also let you reset the light by pushing the trip meter reset button until the change oil light flashes.
What are your driving conditions? Do you actually use it as a truck? If so, I can see it suggesting a short OCI under 3k.
GM started programming hard limits into the OLM around 2011, when they introduced dexos oil after having timing chain failures with the HFV6. These will limit the OCI to 7500 miles or a year, whichever comes first, except on the Volt, which has a limit of 2 years and no mileage limit. If it overheats, which the OLM defines as the coolant temp hitting 260F, it immediately goes to 0%
Reset the light by turning the key on (but not starting it) and then hit the gas pedal to the floor 3 times within 5 seconds. Some cars of that time period also let you reset the light by pushing the trip meter reset button until the change oil light flashes.
What are your driving conditions? Do you actually use it as a truck? If so, I can see it suggesting a short OCI under 3k.
GM started programming hard limits into the OLM around 2011, when they introduced dexos oil after having timing chain failures with the HFV6. These will limit the OCI to 7500 miles or a year, whichever comes first, except on the Volt, which has a limit of 2 years and no mileage limit. If it overheats, which the OLM defines as the coolant temp hitting 260F, it immediately goes to 0%
@otis24
Here's the OLM data for 2007 Yukon Denali w/6.2L gas engine and for my 2002 Corvette w/5.7L gas engine.
07 Yukon OLM data:
25% remaining after 8100 miles
50% remaining after 6200 miles
35% remaining after 7800 miles
25% remaining after 8600 miles
13% remaining after 10,200 miles
31% remaining after 6750 miles
??% remaining after 8600 miles
39% remaining after 7600 miles
51% remaining after 5100 miles
02 C5 Corvette OLM data:
66% remaining after 5,100 miles
51% remaining after 7,200 miles
27% remaining after 9,300 miles
57% remaining after 5,800 miles
So no more than 5k miles (50%) between changes with the Yukon;
and 10k miles (20%) with the C5.
Here's the OLM data for 2007 Yukon Denali w/6.2L gas engine and for my 2002 Corvette w/5.7L gas engine.
07 Yukon OLM data:
25% remaining after 8100 miles
50% remaining after 6200 miles
35% remaining after 7800 miles
25% remaining after 8600 miles
13% remaining after 10,200 miles
31% remaining after 6750 miles
??% remaining after 8600 miles
39% remaining after 7600 miles
51% remaining after 5100 miles
02 C5 Corvette OLM data:
66% remaining after 5,100 miles
51% remaining after 7,200 miles
27% remaining after 9,300 miles
57% remaining after 5,800 miles
So no more than 5k miles (50%) between changes with the Yukon;
and 10k miles (20%) with the C5.
My Silverado doesn’t get used as a “truck” very often. It may have been used more heavily by the previous owner. My mechanic changed the oil when I purchased it. I had him check it over. It needed two knock sensors, which also meant intake gaskets. Replaced plugs, differential oil, catalytic converter. Since the oil monitor wasn’t signaling at the time he serviced it, it probably wasn’t on holis radar to reset it. When I have 7500 miles on the oil, I will change it and reset again.
@otis24
Gas mileage and oil sump capacity are big influences on oil change intervals (OCI) with my 2 GM LS powered vehicles.
Yukon averages about 16 mpg,
Corvette averages about 26 mpg.
Both have 6 qt oil sumps.
I did overheat my 07 Yukon once briefly a few yrs ago when a plastic heater hose T fitting broke. OLM did not reset to zero.
Gas mileage and oil sump capacity are big influences on oil change intervals (OCI) with my 2 GM LS powered vehicles.
Yukon averages about 16 mpg,
Corvette averages about 26 mpg.
Both have 6 qt oil sumps.
I did overheat my 07 Yukon once briefly a few yrs ago when a plastic heater hose T fitting broke. OLM did not reset to zero.
You are correct. I kept it a bit simple but you filled in the details lol
That is interesting that the olm didn't go to zero. I was involved in the GM SUV's but that generation I don't remember exactly but I know if it gets HOT enough and sets the overheat code P0217 then the OLM will go right to zero because the oil will have degraded enough to be changed. So while you overheated it must not have hit the temp limit for the code P0217 to trigger.
Correct
No codes when mine overheated.
