Hi, I can't activate new Schrader 33500 EZ sensors with 2 different tools (KTi 77990A and Autokcan EL-50448, from Amazon). Both tools work fine with the original GM tpms, on Cruze 2017 and Cruze 2018. Any idea of what's wrong ?
I am not familiar with the multifreq sensors. I think you hit right on the nail ("How do you tell it to transmit at 433MHz?") as my best programming tool (KTi p.s.t 71990A) is too limited compared to the tool shown above. I guess the Kti scans many freqs (315, 433) but can't force the sensor to work specifically on 433 MHZ. High level tools are not cheap, so I think I will buy AcDelcos that work with my current tools. Thank you for your post, very appreciated. BelAir 1962
I had trouble setting the winters with my EL-50448. For some reason, the Cruze only responded when I touched the unit's antenna against the tire right where the transmitter would be (at the base of the valve stem). FWIW