07 Tahoe 5.3

Good day , I am wondering if someone can help me . I currently don't have HP tuners and am using a diablo intune . I will probably be getting HP tuners pretty soon to fix a decel surge problem. I recently rebuilt this 5.3 with TSP stage 1 low lift truck cam (208/214 .550/.550 112 LSA). The engine runs good except when coming to a stop the idle will surge from around 500 rpm up to 900. Does anyone have experience tuning a 5.3 with this cam and do you think this is something I can tune out? Thanks in advance.