2009 Opel GT pinouts
The connector/pinout information may be applied to the Opel (show all pinouts) model GT
Opel OBD II diagnostic interface pinout for Opel GT produced after 2007
Chevrolet (2007-2010) Cobalt, Chevy HHR, Pontiac G5 Head Unit pinout for Opel GT of 2006 - 2010 years p/n 25834576, 20795334, 20835358, 20919528