IF your OE radio was the source of activating RSE (by hitting the source button) you can use this harness. If activation was somewhere else like the rear controls, then no you can't
Meta GMOS-014 - GM Onstar/ RSE/ and retain the warning chimes module
The GMOS-014 is designed to retain Onstar/ Rear seat entertainment (RSE)/ and retain the warning chimes that are normally lost when the OEM radio is removed. It also provides a 12 volt accessory output for aftermarket radio operation.
The GMOS-014 provides a mute/ parking brake/ vss or speed sense and reverse output to make installing an aftermarket navigation radio simpler and less time consuming.