From what I have seen you need to rework your harness and chime box...Not bashing but I have heard they dont do well with the BCM on the 355 trucks...Good luck with the vendorship !!
2015 Chevrolet Colorado LT , Ext. Cab
Silver Ice Metallic
3.6 V6 DOHC 6 Speed Auto.
17" Blade Silver Metallic Aluminum Wheels
3:42 Gear G80 Auto. Locking Rear with Tow Package
8" Mylink Entertainment Center
GM Performance Exhaust