73+80 e38 ECM, used 07-14 trucks/suv
https://www.maxxecu.com/webhelp/wirings-pluginecu-chevrolet_corvette_c6_e38_ecm.html
x+y+z E67 ECM used 2007+ envoy, trailblazer, saab 97x, rainier, impala ss, and others