If you have a RED led on your GCIO means that your software is not booting up. Do you have any indication on SMLCD display? If not do a double check on your GCIO slots. IC10,11,24,25. When GCIO is changed, sometimes this ones are replaced in the wrong spot. If your sw is good you supose to see on your SMLCD something like this: SMLCD is connecting, PCT/SCT are ok...If not do the checks on the GCIO. If looks good you need to order the software from ADAMS based on your GO number. If multiple car in the group you need also the system number. Good luck!