Quote:
Originally Posted by 1971gmcshortbed
You can rotate them, if you don't re-learn the new positions it will not automatically learn their new location. Lets say if you rotate and cross the non driven wheels and your left rear goes low it will tell you the right front is low because that is where it thinks it is.
On most G.M. cars/trucks you can re-learn them by initializing the re-learn and dropping the pressure on each tire in order, LF, RF, RR, and LR last. It will honk when it learns the new location.
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The body control module knows where they were at and as soon as you change their position - corner of the vehicle that they were on - they will set off the tire monitor light - in most cases.
By putting on the emergency brake before turning on the key and then only turning on the key to on and pressing the reset / relearn button and then when it beeps - you have to add or subtract air for at least 4 seconds until it recognizes that sensor starting with the right front and then going to the left front and then going to the left rear and then back to the right rear.
At that point - you have at least 15 seconds to turn off the key and release the parking brake. You have as much as a minute between tires when you are manually resetting the monitors and then the system shuts down and then you have to start all over again. Once you do all that, you can go back and reset all the tire pressures and then check the pressures against the tire monitors in the vehicle information center. If the tire pressure is more then 3 lbs more or less then all the rest or if you have one that is reading really low - chances are you are still going to have problems with it.
The way around that is to turn on the key and add air until the pressure comes up to at least 40 PSI - regardless of what the air pressure gauge says on the tire.
Once you get the monitors up, you can turn off the key and bleed down the pressure back to what it should be and the monitor should read the correct pressure after that.
What ever you do - do not remove the valve core from the stem when you mount or dismount the tires. The stem and valve core is known to strip out and when you remove the core and put the wrong one back in - you can damage the monitor / sensor and then it will cost you.
You can call BOB at Brookville Chevrolet if you would like to know how to shut off the tire monitors or if it is possible. (814) 849-8313