GM OEM Reverse Backup Sensor Control Module #23444865

hey this is how to diagnose a faulty parking sensor on each vehicles different mine's a 2001 expedition here's your parking sensor right here you put it in reverse it should be pin side the cabin I'll show you so here's how it will work it I'm going to put the key in and put put it to the on position not you're not actually starting the truck press your brake good put it in reverse and you can hear it revert parking brake sensors working so what we're going to do now I'm going to get a bit a block here oat on that tire just to stop it we're going to do the same thing key to the on position you're not actually trying the truck turning the truck on put it in reverse now if it ain't working obviously it's not beeping inside so you'll come put your ear right next to each sensor if it's working your hero you're hit you'll hear a ticking sound on each sensor for the one that ain't ticking is