2007 sierra classic remote start

I just did an '07 Classic- it still uses the old style bypass like in a '99-02 GM truck or so-- So I used the GMattII That basically supplies the right resistance to bypass the Hall effect resistors in the ignition switch- very straight forward- I found it easier to access the wires att he BCM- and since there were no electric doorlocks- there was no need to put an expensive module in just to do the bypass-- no factory alarms to deal with either- a very simple job-- the GMattII ($7 ) has the variable pot to match up the resistance built into it.