Wiring Harness for 2019 Buick Enclave | GMPartOnline Home 2019 Buick Enclave Wiring Harness. Wiring Harness for 2019 Buick Enclave. 2019 Buick Enclave Change Vehicle. Categories. All; Fuse & Relay; Headlamp Components; Heated Seats; High Mounted Stop Lamp; Horn; Ignition Lock; Wire Harness INSTRUMENT PANEL, W/PRE CRASH; $136. Wire Harness HEADLAMP HARNESS, Buick Enclave Trailer Wiring | etrailer Trailer Wiring Harness Installation - 2009 Buick Enclave. Today on this 2009 Buick Enclave we will be installing wiring harness part number 118450. The connection points for our wiring harness are located directly behind the tail light assemblies on both of the drivers and passengers sides.