I'm not familiar with how a aftermarket harness is set up. If it's just a stand alone harness then you won't have any of the factory stuff working such as gauges and stuff. Better to give Nelson or whom ever a call. Cruise control depends on the type of throttle body you use. Dbw or dbc either way it's not hard to keep. I really prefer the Dbw especially for the cruuse.
97 RCSB . 2WD . 5.3 . 4l60E . E-FANS . PNP 706s . TSP 228R . 3600 STALL . HD2 . VETTE SERVO . 3.73s . 2" DROP
TURBO IN THE WORKS