03 esclade

we did a large install on a 03 esclade four months ago and interfaced the onstar system with the bypass interfaced the steering wheel controls with a bypass bypassed the pass lock 2 with a bypass and interfaced the door locks with a bypass from dei, they had a vehicile notice that a sensor for a leveling system was bad but are telling me that thier shop computor can not communicate with the on board computor, any one else had a simular experience? their shop forman is asking me if I can supply a diagrahm of where we interfaced with the truck, that would be a job,bad thing for us it was an out of state install any way let me know if you have seen this thanks.

[they had a vehicile notice that a sensor for a leveling system was bad but are telling me that thier shop computor can not communicate with the on board computor, ] ??? not quite understanding what is wrong?       Cruisin Security And Sounds

the shop says that they are unable to reset the warning lights on the dash after installing sensor. I'mjust curious if anyone else has had this problmand discoed their by pass, I useda perhipial plgmd bypass for the pass lock and tied into the purple wire close to the obd connector.