On a 2007 Equinox, the wires go to the seat sensor. It isn't just a switch it actually sends the passengers weight information to the system to tell it if there is a person in the seat and how hard it should deploy the airbags to handle that weight. There are 4 wires to the module. One is Red with a white stripe, that is battery power, another is Black with a white stripe and that is the ground. The two green wires are the data lines to the SRS module that tells it how much the person in the seat weighs.
Now if you have the 2005 version there is no sensor.
Image (Click to make bigger)
Saturday, November 21st, 2020 AT 1:12 AM