How to test Colorado Home › Community › Launch X431 General Information › How to test Colorado Tagged: X431 How to This topic has 0 replies, 1 voice, and was last updated 6 years ago by Launchtech. Viewing 1 post (of 1 total) Author Posts November 7, 2018 at 11:49 am #851 LaunchtechKeymaster 1. Before 2015, GM->Manually Select->(C)2012->LD Trk, MPV,Incomplete->Chevrolet Truck->S(VIN 5th) 2.After 2015, GM->->Manually Select->(E)2014->LD Trk, MPV,Incomplete ->Chevrolet Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In