The correct Wiring harness for the 2007 Chevrolet Cobalt Coupe is the Custom Fit Trailer Wiring, item # 118407. This harness is designed specifically for the 2 door model.
The T-One Vehicle Wiring Harness, item # 118398, has different connectors to match the connectors on the 4 door sedan models of the Cobalt. view full answer...