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International Automotive Technicians Network
Re: GM Passlock & Tuners
Posted to Technical Discussion Forum on 12/4/2019

Don a relatively inexpensive and easy to install "fix" would be to wire in a 2.2k ohm resistor between the passlock sensor signal circuit and the passlock sensor ground circuit. The passlock module is looking for a fixed return voltage signal from the passlock... Login to read more.