Cruze 2015 Diesel tail light wiring diagram.

From what I remember, this was a plug-n-play install. I shortened some of the wires, hence the soldering station.
Also, for as long as I can remember, GM has used the same colored wires for the taillight harness. I believe it may me an industry standard.

Dark green=right turn/stop
Yellow =left turn/stop
Brown=parking lights
Light green=backup lights

The brake lights are a little different=
It depends on if the car shares brake and turn signal bulbs, which the Cruze does not. I believe the brake light wire should be blue, but I am not sure.
On the systems that share bulb duties, the brake light signal coming out of the brake switch is white. It goes up to the turn signal switch. The turn signal switch directs the brake signal into the turn signal wiring, green and yellow wires. The third brake light on these systems is a blue wire out of the brake light switch, that is why I believe blue should go to the brake lights. But I haven't confirmed that on my Cruze.

Hope this helps.


-Brad