Hello, I am a mechanic who actually serviced and rotated the tires on a NV 2500 today. Oddly enough, Alldata provided no answers, and I came across this post before I managed to find the owners manual with the detailed instructions. I figured I'd give my input and hopefully be of some help. dneiding and the owners manual instructions do work, however you need to follow the instructions literally word for word and do EXACTLY as the instructions say. A detail dneiding did not mention, that was in the manual, is that you have to deflate EACH tire a minimum of 10 psi in a time frame of 30 seconds. I assume maybe some people leave the left rear tire as is at 80 psi, what I did was inflated that tire to 95 psi, then when I got around to deflating that tire, brought it back down to 80. Not sure if it matter whether the ignition is on or off, but I left the key in the run position during the entire process. The deflation process is what initiates the TPMS to go into what I call the TPMS sensor recalibration procedure. I then deflated the tires as specified, taking at least 30 seconds per tire, and taking at least 10 psi in those 30 seconds. Once you deflate all 4 tires as specified, the TPMS light will blink and will be in recalibration mode. Follow the instructions in the manual to reset the TPMS from the dash using the knob, and wait about a minute. You should hear the 3 chimes and see the light blink. The TPMS sensors will now be recalibrated to their new positions. Adjust tire pressure to specs, and for the me, the TPMS light went away instantly.after setting the last tire to the correct PSI. Also, someone mentioned having time to wait 30 minutes with the key on, this procedure took about 5 minutes total. Once you deflate the tires accordingly, the vehicle stays in the sensor recalibration mode for 30 minutes, as long as you have the the ignition on. Like I said, procedure needs to be follow exactly as it says. I was able to get this done on the first try. Hope this helps.
