Andretti and Cadillac
As US car manufacturers usually utilized 3rd party engine designer, builder, assembler and tuner partner for racing engines, Cadillac may seeking their 3rd party engine designer, builder, assembler and tuner partner for better engine development just like Ford with Red Bull Powertrains Technology in Formula 1 as well as Roush Yates Engines in NASCAR and Chevrolet with Hendrick and Earnhardt Childress in NASCAR as well as Ilmor in IndyCar Series.