stereo wiring harness question

[Game Over]

newbie here,

planning on replacing my stock HU with Pioneer DVH-5000MP & DEQ-7600 Double Din configuration, but haven't had the luck of finding the right wiring harness for the H3, always says none available. Now I tried searching under chevrolet colorado & GMC Canyon and the Metra Model VT-GMRC-01 came out for both. now my question is since H3 is based on 'em, if 'm not mistaken do u guys think they share the same wiring harness as well ? BTW for the guys that have done this themselves, attached is the pic..also don't care much for OnStar coz 'm not sure if I'd be able to use it over here in Germany, so hardwiring advices are more than welcome.

thanks