[Oldtruckfanatic]

Im not too familiar with suburbans but it wont matter where the harness is run. All that wire does is go from the fuse box to the switch and from the switch to the backup lights usually via the tail light harness. On automatics the switch is on the column and on floor shift manuals its on the transmission so there will likely be a plug underneath that doesnt go anywhere that will need a jumper or splice to complete the circuit after you redirect the power through the column switch. unless its cut off.