Have a 2007 Escalade EXT with 6.2 V8. Vehicle quits after running highway and co

Hello, hands on diagnostic testing is required. I would check for fuel pressure, fuel delivery, ignition spark, air intake flow, and ensure proper performance in all these areas. Using a diagnostic tool, checking for any trouble codes and monitoring operation is needed.

I had the same issue with my 07. After replacing multiple expensive and taking the truck to 2 different Cadillac dealerships. They finally followed the coding back to the timing chain. This is after replacing the fuel pump & the throttle position sensor