I need to know what the gm part# is for the 350 tuned port esc module on an 87-89 car. The esc module is the flat shaped black plastic module with 4 wires running to it, and it's mounted behind the brake booster on the driver's side of the firewall. Could someone with an original 350 tuned port car take a look and tell me what the number is? Thanks.

 

GM P/N 16038331 is the upgraded ESC module.