Homeless by Choice wrote:
I have a 2015 Chevy 3500, DRW. It has some kind of tire malfunction warning devise built into it. I don't know what it is or how it functions.
I can't answer your questions, but I can help you with the above comment.
Whether they're a dummy-light system, or a fully monitor-able PSI TPMS system, they work through your Key-Fob receiver. Dummy-light systems are just that... dummy lights at low pressure, with a TPMS sensor in each tire.
The ones from the factory that display actual pressure/PSI also work through the Keyless Entry receiver via TPMS sensors in each tire. They will transmit every so often, not constantly. You could, in theory, get a quick leaker, and be flat before the system realizes it. Just keep that in mind.
They only transmit when in motion. It's not like they're sitting there pinging all night when your car is in the garage. After several thousand miles, the batteries inside each sensor go dead and you have to replace them. It's about the same time you need new tires. And no, you can't just replace the batteries - they're sealed in epoxy.
When the tire dealer install new ones, they reprogram your Keyless Entry receiver the same way as if you needed a new door keyfob. usually by either a series of honks by the horn, or a dash display saying which sensor to program when.
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