I had the same plug on my old GT.I believe it is for an L67 MAP sensor.GM decided to let it be in some GTs but it helps if you plan to top swap, its just plug and play considering you buy the MAP extension harness.
Map sensors are three wire. That's no map sensor. May have been the plug in for the Cali emissions soleniod.
I drink..so consider that when reading my posts.
2010 Audi A6 Dual IC's
#2
Re: Have a feeling this is sposed to be plugged in someplace. Help Please!