[clinebarger]

There is no conventional way to hook up the TV cable on a "Drive By Wire" engine.

I have heard talk of using the throttle pedal to run the TV cable, However even if you got geometry worked out.....The pedal would be stiff.

A '07 Suburban had either a 4L60E or a 6L80E.

Look over your harness, You will have 2 large connectors for the E38 ECM.

If you have a 3rd large connector (See Pic), That is for a T42 TCM....Meaning the engine originally had a 4L60E. Hopefully you have the TCM as well.

If no TCM Connector can be found, It had a 6L80E...The TCM is part of the Valve Body on 6 speed autos.